/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-data/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:25:09,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:25:09,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:25:09,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:25:09,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:25:09,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:25:09,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:25:09,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:25:09,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:25:09,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:25:09,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:25:09,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:25:09,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:25:09,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:25:09,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:25:09,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:25:09,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:25:09,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:25:09,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:25:09,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:25:09,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:25:09,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:25:09,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:25:09,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:25:09,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:25:09,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:25:09,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:25:09,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:25:09,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:25:09,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:25:09,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:25:09,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:25:09,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:25:09,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:25:09,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:25:09,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:25:09,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:25:09,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:25:09,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:25:09,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:25:09,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:25:09,397 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 23:25:09,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:25:09,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:25:09,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:25:09,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:25:09,431 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:25:09,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:25:09,431 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:25:09,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:25:09,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:25:09,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:25:09,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:25:09,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:25:09,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:25:09,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:25:09,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:25:09,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:25:09,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:25:09,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:25:09,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:25:09,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:25:09,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:25:09,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:25:09,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:25:09,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:25:09,438 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:25:09,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:25:09,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:25:09,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:25:09,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:25:09,787 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:25:09,788 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/running_example.i [2020-10-14 23:25:09,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49b5d822/9237402a78644a0d9910857cd6df84ab/FLAG8ea0bf140 [2020-10-14 23:25:10,423 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:25:10,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/running_example.i [2020-10-14 23:25:10,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49b5d822/9237402a78644a0d9910857cd6df84ab/FLAG8ea0bf140 [2020-10-14 23:25:10,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49b5d822/9237402a78644a0d9910857cd6df84ab [2020-10-14 23:25:10,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:25:10,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:25:10,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:25:10,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:25:10,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:25:10,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:25:10" (1/1) ... [2020-10-14 23:25:10,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4339ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:10, skipping insertion in model container [2020-10-14 23:25:10,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:25:10" (1/1) ... [2020-10-14 23:25:10,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:25:10,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:25:11,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:25:11,209 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:25:11,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:25:11,312 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:25:11,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11 WrapperNode [2020-10-14 23:25:11,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:25:11,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:25:11,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:25:11,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:25:11,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (1/1) ... [2020-10-14 23:25:11,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:25:11,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:25:11,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:25:11,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:25:11,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (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 23:25:11,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:25:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:25:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:25:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:25:11,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:25:11,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:25:11,444 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:25:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:25:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:25:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:25:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:25:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:25:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:25:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:25:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:25:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:25:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:25:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:25:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:25:11,449 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:25:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:25:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:25:11,452 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:25:11,453 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:25:11,454 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:25:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:25:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:25:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:25:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:25:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:25:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:25:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:25:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:25:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:25:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:25:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:25:11,987 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:25:11,987 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 23:25:11,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:25:11 BoogieIcfgContainer [2020-10-14 23:25:11,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:25:11,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:25:11,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:25:11,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:25:11,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:25:10" (1/3) ... [2020-10-14 23:25:11,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191cc54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:25:11, skipping insertion in model container [2020-10-14 23:25:11,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:25:11" (2/3) ... [2020-10-14 23:25:11,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191cc54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:25:11, skipping insertion in model container [2020-10-14 23:25:11,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:25:11" (3/3) ... [2020-10-14 23:25:12,000 INFO L109 eAbstractionObserver]: Analyzing ICFG running_example.i [2020-10-14 23:25:12,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:25:12,020 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:25:12,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:25:12,059 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:25:12,059 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:25:12,059 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:25:12,060 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:25:12,060 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:25:12,060 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:25:12,060 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:25:12,061 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:25:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 23:25:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:25:12,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:12,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:12,087 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1790475303, now seen corresponding path program 1 times [2020-10-14 23:25:12,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:12,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923979979] [2020-10-14 23:25:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:12,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:12,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:12,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:25:12,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:12,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-14 23:25:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:12,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:12,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:25:12,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:12,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:25:12,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:25:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:12,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:12,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:12,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:25:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:12,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:12,720 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 23:25:12,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923979979] [2020-10-14 23:25:12,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:25:12,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:25:12,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122188381] [2020-10-14 23:25:12,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:25:12,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:25:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:25:12,747 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-14 23:25:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:12,907 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-10-14 23:25:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:25:12,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-14 23:25:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:12,921 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:25:12,921 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:25:12,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:25:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-14 23:25:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:25:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-14 23:25:12,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 12 [2020-10-14 23:25:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:12,972 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-14 23:25:12,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:25:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-14 23:25:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:25:12,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:12,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:12,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:25:12,975 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:12,975 INFO L82 PathProgramCache]: Analyzing trace with hash 147079127, now seen corresponding path program 1 times [2020-10-14 23:25:12,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:12,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958041842] [2020-10-14 23:25:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:13,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:25:13,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-14 23:25:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:25:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:25:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:13,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:13,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:25:13,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:13,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:13,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:13,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958041842] [2020-10-14 23:25:13,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:13,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:25:13,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966234398] [2020-10-14 23:25:13,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:25:13,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:25:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:25:13,475 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 7 states. [2020-10-14 23:25:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:13,691 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2020-10-14 23:25:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:13,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:25:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:13,693 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:25:13,693 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:25:13,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:25:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-10-14 23:25:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:25:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-14 23:25:13,703 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2020-10-14 23:25:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:13,704 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-14 23:25:13,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:25:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-14 23:25:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:25:13,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:13,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:13,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:25:13,706 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash 470360634, now seen corresponding path program 1 times [2020-10-14 23:25:13,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:13,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940991612] [2020-10-14 23:25:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:13,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:25:13,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 23:25:13,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:25:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:25:13,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:13,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:13,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:13,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:13,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:13,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:25:13,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:13,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:13,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:13,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:13,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:13,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940991612] [2020-10-14 23:25:13,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:13,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:25:13,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629233174] [2020-10-14 23:25:13,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:25:13,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:25:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:25:13,898 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 6 states. [2020-10-14 23:25:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:14,085 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-10-14 23:25:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:25:14,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:25:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:14,087 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:25:14,087 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:25:14,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:25:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-14 23:25:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:25:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-10-14 23:25:14,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 20 [2020-10-14 23:25:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:14,097 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-10-14 23:25:14,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:25:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-10-14 23:25:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:25:14,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:14,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:14,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:25:14,099 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash 977312820, now seen corresponding path program 1 times [2020-10-14 23:25:14,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:14,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99848240] [2020-10-14 23:25:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:14,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:14,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:25:14,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 23:25:14,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:14,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:25:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:25:14,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:14,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:14,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:14,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:14,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:14,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:14,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:14,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:14,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:14,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99848240] [2020-10-14 23:25:14,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:14,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:25:14,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647837988] [2020-10-14 23:25:14,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:25:14,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:25:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:25:14,571 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 7 states. [2020-10-14 23:25:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:14,833 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-14 23:25:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:25:14,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:25:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:14,842 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:25:14,842 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:25:14,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:25:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-14 23:25:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:25:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-14 23:25:14,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 22 [2020-10-14 23:25:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:14,863 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-14 23:25:14,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:25:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-14 23:25:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:25:14,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:14,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:14,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:25:14,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:14,867 INFO L82 PathProgramCache]: Analyzing trace with hash 977314742, now seen corresponding path program 1 times [2020-10-14 23:25:14,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:14,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541512903] [2020-10-14 23:25:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:14,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:14,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:15,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:25:15,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:25:15,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-14 23:25:15,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:15,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:25:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:15,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:25:15,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:15,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:15,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:15,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:25:15,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:15,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:15,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:15,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:15,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:15,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:15,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541512903] [2020-10-14 23:25:15,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:15,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:25:15,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644169086] [2020-10-14 23:25:15,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:25:15,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:15,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:25:15,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:25:15,307 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 7 states. [2020-10-14 23:25:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:15,496 INFO L93 Difference]: Finished difference Result 96 states and 132 transitions. [2020-10-14 23:25:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:15,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:25:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:15,498 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:25:15,498 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:25:15,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:25:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-14 23:25:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 23:25:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-10-14 23:25:15,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 22 [2020-10-14 23:25:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:15,511 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-10-14 23:25:15,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:25:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-10-14 23:25:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:25:15,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:15,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:15,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:25:15,512 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 167966194, now seen corresponding path program 1 times [2020-10-14 23:25:15,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:15,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57018729] [2020-10-14 23:25:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:15,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:15,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:25:15,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:25:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-14 23:25:15,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:15,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:25:15,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:16,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:16,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:16,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:16,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:16,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:25:16,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:16,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:16,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:16,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57018729] [2020-10-14 23:25:16,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:16,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:16,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177097593] [2020-10-14 23:25:16,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:16,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:16,064 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 8 states. [2020-10-14 23:25:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:16,476 INFO L93 Difference]: Finished difference Result 111 states and 150 transitions. [2020-10-14 23:25:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:16,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:25:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:16,478 INFO L225 Difference]: With dead ends: 111 [2020-10-14 23:25:16,479 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:25:16,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:25:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2020-10-14 23:25:16,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:25:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-10-14 23:25:16,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 22 [2020-10-14 23:25:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:16,509 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-10-14 23:25:16,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-10-14 23:25:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:25:16,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:16,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:16,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:25:16,516 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash 238325853, now seen corresponding path program 2 times [2020-10-14 23:25:16,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:16,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215451590] [2020-10-14 23:25:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:16,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:16,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:16,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:25:16,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-14 23:25:16,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:16,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:16,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:16,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:25:16,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:17,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:17,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:17,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:25:17,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:17,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:17,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215451590] [2020-10-14 23:25:17,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:17,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:17,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818299469] [2020-10-14 23:25:17,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:17,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:17,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:17,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:17,049 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-10-14 23:25:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:17,432 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2020-10-14 23:25:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:17,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:25:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:17,435 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:25:17,435 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:25:17,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:25:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2020-10-14 23:25:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:25:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 111 transitions. [2020-10-14 23:25:17,471 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 111 transitions. Word has length 22 [2020-10-14 23:25:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:17,472 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 111 transitions. [2020-10-14 23:25:17,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2020-10-14 23:25:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:25:17,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:17,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:17,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:25:17,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 238327775, now seen corresponding path program 1 times [2020-10-14 23:25:17,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:17,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901869345] [2020-10-14 23:25:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:17,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:17,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:17,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:25:17,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:17,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-14 23:25:17,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:17,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:25:17,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:17,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:17,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:17,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:17,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:17,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:17,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:17,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:17,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:17,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:17,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:17,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:17,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901869345] [2020-10-14 23:25:17,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:17,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:17,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771743144] [2020-10-14 23:25:17,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:17,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:17,962 INFO L87 Difference]: Start difference. First operand 79 states and 111 transitions. Second operand 8 states. [2020-10-14 23:25:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:18,174 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2020-10-14 23:25:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:18,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 23:25:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:18,176 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:25:18,176 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:25:18,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:25:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-10-14 23:25:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:25:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2020-10-14 23:25:18,192 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 22 [2020-10-14 23:25:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2020-10-14 23:25:18,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2020-10-14 23:25:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:25:18,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:18,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:18,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:25:18,197 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2035848896, now seen corresponding path program 1 times [2020-10-14 23:25:18,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:18,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217959136] [2020-10-14 23:25:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:18,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:18,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:25:18,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:25:18,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:18,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:18,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:25:18,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:18,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:18,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:18,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:18,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:18,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:18,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:18,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:18,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:18,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:18,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:18,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:18,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:18,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217959136] [2020-10-14 23:25:18,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:18,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:18,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258680008] [2020-10-14 23:25:18,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:18,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:18,629 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 9 states. [2020-10-14 23:25:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:18,948 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2020-10-14 23:25:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:25:18,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:25:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:18,950 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:25:18,951 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:25:18,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:25:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2020-10-14 23:25:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:25:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 134 transitions. [2020-10-14 23:25:18,969 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 134 transitions. Word has length 24 [2020-10-14 23:25:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:18,969 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 134 transitions. [2020-10-14 23:25:18,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 134 transitions. [2020-10-14 23:25:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:25:18,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:18,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:18,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:25:18,976 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2035846974, now seen corresponding path program 1 times [2020-10-14 23:25:18,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:18,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203422198] [2020-10-14 23:25:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:19,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:19,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:19,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:19,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:25:19,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:19,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:25:19,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:19,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:19,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:19,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:19,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:19,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:19,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:19,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:19,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:19,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:19,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203422198] [2020-10-14 23:25:19,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:19,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:19,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892042489] [2020-10-14 23:25:19,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:19,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:19,411 INFO L87 Difference]: Start difference. First operand 95 states and 134 transitions. Second operand 9 states. [2020-10-14 23:25:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:19,734 INFO L93 Difference]: Finished difference Result 156 states and 220 transitions. [2020-10-14 23:25:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:25:19,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:25:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:19,736 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:25:19,736 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 23:25:19,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 23:25:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 103. [2020-10-14 23:25:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:25:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 145 transitions. [2020-10-14 23:25:19,763 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 145 transitions. Word has length 24 [2020-10-14 23:25:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:19,763 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 145 transitions. [2020-10-14 23:25:19,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 145 transitions. [2020-10-14 23:25:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:25:19,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:19,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:19,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:25:19,765 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1978590594, now seen corresponding path program 1 times [2020-10-14 23:25:19,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:19,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343355579] [2020-10-14 23:25:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:20,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:25:20,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:20,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-14 23:25:20,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:20,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:20,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:20,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:25:20,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:20,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:20,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:20,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:20,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:20,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:20,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:20,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:20,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343355579] [2020-10-14 23:25:20,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:20,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:20,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453051138] [2020-10-14 23:25:20,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:20,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:20,273 INFO L87 Difference]: Start difference. First operand 103 states and 145 transitions. Second operand 9 states. [2020-10-14 23:25:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:20,593 INFO L93 Difference]: Finished difference Result 138 states and 191 transitions. [2020-10-14 23:25:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:25:20,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:25:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:20,597 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:25:20,597 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 23:25:20,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 23:25:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2020-10-14 23:25:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 23:25:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-10-14 23:25:20,606 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 24 [2020-10-14 23:25:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:20,607 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-10-14 23:25:20,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-10-14 23:25:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:25:20,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:20,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:20,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:25:20,609 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1986609468, now seen corresponding path program 1 times [2020-10-14 23:25:20,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:20,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588583647] [2020-10-14 23:25:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:20,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:21,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:21,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:25:21,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:25:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:25:21,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:21,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:21,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:21,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:21,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588583647] [2020-10-14 23:25:21,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:21,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:21,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96067643] [2020-10-14 23:25:21,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:21,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:21,385 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 8 states. [2020-10-14 23:25:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:21,610 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-10-14 23:25:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:21,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 23:25:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:21,613 INFO L225 Difference]: With dead ends: 173 [2020-10-14 23:25:21,613 INFO L226 Difference]: Without dead ends: 145 [2020-10-14 23:25:21,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-14 23:25:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-14 23:25:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:25:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 154 transitions. [2020-10-14 23:25:21,628 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 154 transitions. Word has length 26 [2020-10-14 23:25:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:21,628 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 154 transitions. [2020-10-14 23:25:21,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 154 transitions. [2020-10-14 23:25:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:25:21,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:21,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:21,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:25:21,629 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1177260920, now seen corresponding path program 1 times [2020-10-14 23:25:21,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:21,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706604968] [2020-10-14 23:25:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:21,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:22,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:22,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:25:22,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:25:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 23:25:22,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:22,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:22,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:22,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:22,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:25:22,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:22,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:22,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:22,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:22,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:22,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:22,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:22,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:22,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:22,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:22,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706604968] [2020-10-14 23:25:22,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:22,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:25:22,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144030484] [2020-10-14 23:25:22,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:25:22,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:25:22,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:25:22,497 INFO L87 Difference]: Start difference. First operand 110 states and 154 transitions. Second operand 7 states. [2020-10-14 23:25:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:22,684 INFO L93 Difference]: Finished difference Result 178 states and 252 transitions. [2020-10-14 23:25:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:25:22,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-14 23:25:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:22,686 INFO L225 Difference]: With dead ends: 178 [2020-10-14 23:25:22,686 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 23:25:22,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 23:25:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 23:25:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 95. [2020-10-14 23:25:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:25:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2020-10-14 23:25:22,698 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 26 [2020-10-14 23:25:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:22,698 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2020-10-14 23:25:22,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:25:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2020-10-14 23:25:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:25:22,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:22,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:22,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:25:22,700 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:22,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1609413667, now seen corresponding path program 2 times [2020-10-14 23:25:22,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:22,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372999429] [2020-10-14 23:25:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:22,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:23,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:23,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:25:23,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-14 23:25:23,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:23,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:25:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:23,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:23,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:23,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:23,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:23,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:23,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:23,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:23,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:23,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:25:23,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372999429] [2020-10-14 23:25:23,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:23,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:25:23,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144338964] [2020-10-14 23:25:23,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:25:23,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:25:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:25:23,217 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand 7 states. [2020-10-14 23:25:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:23,429 INFO L93 Difference]: Finished difference Result 191 states and 266 transitions. [2020-10-14 23:25:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:23,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 23:25:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:23,431 INFO L225 Difference]: With dead ends: 191 [2020-10-14 23:25:23,431 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 23:25:23,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:25:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 23:25:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-14 23:25:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-14 23:25:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2020-10-14 23:25:23,445 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 28 [2020-10-14 23:25:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:23,445 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2020-10-14 23:25:23,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:25:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2020-10-14 23:25:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:25:23,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:23,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:23,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:25:23,456 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1528741190, now seen corresponding path program 2 times [2020-10-14 23:25:23,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:23,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003066606] [2020-10-14 23:25:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:23,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:23,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:23,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:25:23,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:23,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-14 23:25:23,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:23,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:23,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:25:23,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:23,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:23,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:23,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:23,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:23,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:23,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:23,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:23,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:23,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003066606] [2020-10-14 23:25:23,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:23,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:25:23,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991613245] [2020-10-14 23:25:23,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:25:23,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:23,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:25:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:25:23,916 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand 10 states. [2020-10-14 23:25:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:24,276 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2020-10-14 23:25:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:25:24,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:25:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:24,279 INFO L225 Difference]: With dead ends: 141 [2020-10-14 23:25:24,279 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 23:25:24,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:25:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 23:25:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 124. [2020-10-14 23:25:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:25:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2020-10-14 23:25:24,292 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 28 [2020-10-14 23:25:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:24,294 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2020-10-14 23:25:24,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:25:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2020-10-14 23:25:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:25:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:24,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:24,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:25:24,295 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:24,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1528743112, now seen corresponding path program 2 times [2020-10-14 23:25:24,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:24,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85611717] [2020-10-14 23:25:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:24,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:24,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:24,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:25:24,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:24,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-14 23:25:24,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:24,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:24,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:25:24,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:24,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:24,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:24,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:24,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:24,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:24,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:25:24,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:24,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:24,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:24,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:24,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85611717] [2020-10-14 23:25:24,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:24,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:25:24,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078053343] [2020-10-14 23:25:24,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:25:24,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:25:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:25:24,894 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand 10 states. [2020-10-14 23:25:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:25,667 INFO L93 Difference]: Finished difference Result 184 states and 244 transitions. [2020-10-14 23:25:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:25,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:25:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:25,669 INFO L225 Difference]: With dead ends: 184 [2020-10-14 23:25:25,670 INFO L226 Difference]: Without dead ends: 165 [2020-10-14 23:25:25,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-14 23:25:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2020-10-14 23:25:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 23:25:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2020-10-14 23:25:25,694 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 28 [2020-10-14 23:25:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:25,695 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2020-10-14 23:25:25,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:25:25,695 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2020-10-14 23:25:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:25:25,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:25,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:25,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:25:25,697 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1585999492, now seen corresponding path program 2 times [2020-10-14 23:25:25,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:25,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716601800] [2020-10-14 23:25:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:25,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:26,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:25:26,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:26,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-14 23:25:26,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:26,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:26,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:26,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:25:26,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:26,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:26,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:26,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:26,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:26,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:26,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:26,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:26,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:26,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:26,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716601800] [2020-10-14 23:25:26,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:26,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:26,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490146965] [2020-10-14 23:25:26,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:26,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:26,344 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand 8 states. [2020-10-14 23:25:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:26,638 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2020-10-14 23:25:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:26,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 23:25:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:26,641 INFO L225 Difference]: With dead ends: 177 [2020-10-14 23:25:26,641 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 23:25:26,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 23:25:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-10-14 23:25:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:25:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2020-10-14 23:25:26,668 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 28 [2020-10-14 23:25:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:26,668 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2020-10-14 23:25:26,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2020-10-14 23:25:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:25:26,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:26,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:26,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:25:26,670 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash -525995879, now seen corresponding path program 2 times [2020-10-14 23:25:26,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:26,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676864441] [2020-10-14 23:25:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:27,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:25:27,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:27,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:25:27,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:27,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:27,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:27,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:27,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:27,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:27,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:27,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:27,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:25:27,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676864441] [2020-10-14 23:25:27,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:27,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:27,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898390061] [2020-10-14 23:25:27,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:27,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:27,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:27,413 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand 8 states. [2020-10-14 23:25:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:27,615 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2020-10-14 23:25:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:27,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 23:25:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:27,617 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:25:27,617 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 23:25:27,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:27,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 23:25:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-10-14 23:25:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 23:25:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 171 transitions. [2020-10-14 23:25:27,638 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 171 transitions. Word has length 30 [2020-10-14 23:25:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:27,638 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 171 transitions. [2020-10-14 23:25:27,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 171 transitions. [2020-10-14 23:25:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:25:27,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:27,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:27,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:25:27,640 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:27,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1335344427, now seen corresponding path program 1 times [2020-10-14 23:25:27,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:27,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461217404] [2020-10-14 23:25:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:27,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:28,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:28,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:25:28,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:25:28,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 23:25:28,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:28,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:28,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:25:28,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:28,359 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-14 23:25:28,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:28,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:28,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:28,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:28,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:28,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:28,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 23:25:28,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461217404] [2020-10-14 23:25:28,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:28,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:25:28,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599850383] [2020-10-14 23:25:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:25:28,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:25:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:25:28,423 INFO L87 Difference]: Start difference. First operand 132 states and 171 transitions. Second operand 8 states. [2020-10-14 23:25:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:28,858 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2020-10-14 23:25:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:28,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 23:25:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:28,859 INFO L225 Difference]: With dead ends: 142 [2020-10-14 23:25:28,859 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:25:28,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:25:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2020-10-14 23:25:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-14 23:25:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2020-10-14 23:25:28,870 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 30 [2020-10-14 23:25:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:28,871 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2020-10-14 23:25:28,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:25:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2020-10-14 23:25:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:25:28,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:28,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:28,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:25:28,872 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:28,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:28,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1614159849, now seen corresponding path program 3 times [2020-10-14 23:25:28,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:28,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319324913] [2020-10-14 23:25:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:28,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:29,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:29,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:25:29,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:29,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 23:25:29,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:29,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:29,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:29,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:29,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:25:29,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:29,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:29,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:29,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:29,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:29,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:29,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:29,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319324913] [2020-10-14 23:25:29,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:29,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:29,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040375632] [2020-10-14 23:25:29,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:29,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:29,319 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand 9 states. [2020-10-14 23:25:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:29,769 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2020-10-14 23:25:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:25:29,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 23:25:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:29,771 INFO L225 Difference]: With dead ends: 145 [2020-10-14 23:25:29,771 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:25:29,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:25:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:25:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-14 23:25:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:25:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2020-10-14 23:25:29,786 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 30 [2020-10-14 23:25:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:29,786 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2020-10-14 23:25:29,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2020-10-14 23:25:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:25:29,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:29,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:29,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:25:29,788 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:29,788 INFO L82 PathProgramCache]: Analyzing trace with hash 173779906, now seen corresponding path program 2 times [2020-10-14 23:25:29,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:29,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984340333] [2020-10-14 23:25:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:29,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:29,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:30,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:25:30,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:30,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:30,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:30,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:30,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:30,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:30,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:30,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:30,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:30,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984340333] [2020-10-14 23:25:30,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:30,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:30,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564659294] [2020-10-14 23:25:30,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:30,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:30,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:30,811 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 9 states. [2020-10-14 23:25:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:31,091 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-10-14 23:25:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:31,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 23:25:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:31,093 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:25:31,094 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 23:25:31,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:25:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 23:25:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2020-10-14 23:25:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:25:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2020-10-14 23:25:31,106 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 30 [2020-10-14 23:25:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:31,106 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2020-10-14 23:25:31,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2020-10-14 23:25:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:25:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:31,107 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:31,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:25:31,107 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash 656732581, now seen corresponding path program 3 times [2020-10-14 23:25:31,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:31,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19000246] [2020-10-14 23:25:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:31,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:31,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:25:31,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:25:31,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:25:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:32,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:32,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:32,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:32,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:32,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:25:32,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:32,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:32,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:32,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:25:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:32,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19000246] [2020-10-14 23:25:32,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:32,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:32,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528122073] [2020-10-14 23:25:32,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:32,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:32,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:32,109 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand 9 states. [2020-10-14 23:25:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:32,376 INFO L93 Difference]: Finished difference Result 181 states and 237 transitions. [2020-10-14 23:25:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:25:32,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-14 23:25:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:32,379 INFO L225 Difference]: With dead ends: 181 [2020-10-14 23:25:32,379 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:25:32,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:25:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 125. [2020-10-14 23:25:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:25:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2020-10-14 23:25:32,393 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 32 [2020-10-14 23:25:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:32,393 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2020-10-14 23:25:32,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2020-10-14 23:25:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:25:32,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:32,394 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] [2020-10-14 23:25:32,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:25:32,394 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:32,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash -152615967, now seen corresponding path program 1 times [2020-10-14 23:25:32,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:32,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304004023] [2020-10-14 23:25:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:32,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:33,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:34,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:34,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:25:34,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:25:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-14 23:25:34,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:34,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:34,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:25:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:34,750 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-14 23:25:34,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:34,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:34,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:34,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:34,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:34,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:34,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:34,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:34,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:34,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:34,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:25:34,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304004023] [2020-10-14 23:25:34,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:34,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:34,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474067696] [2020-10-14 23:25:34,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:34,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:34,814 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand 9 states. [2020-10-14 23:25:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:35,275 INFO L93 Difference]: Finished difference Result 188 states and 251 transitions. [2020-10-14 23:25:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:25:35,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-14 23:25:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:35,277 INFO L225 Difference]: With dead ends: 188 [2020-10-14 23:25:35,277 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 23:25:35,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:25:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 23:25:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 146. [2020-10-14 23:25:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 23:25:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2020-10-14 23:25:35,291 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 32 [2020-10-14 23:25:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:35,291 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2020-10-14 23:25:35,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2020-10-14 23:25:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:25:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:35,292 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:35,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:25:35,293 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1138713012, now seen corresponding path program 4 times [2020-10-14 23:25:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:35,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722002440] [2020-10-14 23:25:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:35,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:35,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:35,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:25:35,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-14 23:25:35,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:35,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:25:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:35,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:25:35,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:35,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:35,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:35,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:35,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:35,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:35,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:35,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:35,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:35,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:35,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722002440] [2020-10-14 23:25:35,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:35,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:25:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438820022] [2020-10-14 23:25:35,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:25:35,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:25:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:35,816 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand 11 states. [2020-10-14 23:25:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:36,252 INFO L93 Difference]: Finished difference Result 171 states and 224 transitions. [2020-10-14 23:25:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:25:36,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 23:25:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:36,254 INFO L225 Difference]: With dead ends: 171 [2020-10-14 23:25:36,254 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 23:25:36,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:25:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 23:25:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 150. [2020-10-14 23:25:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 23:25:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2020-10-14 23:25:36,267 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 32 [2020-10-14 23:25:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:36,268 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2020-10-14 23:25:36,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:25:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2020-10-14 23:25:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:25:36,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:36,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:36,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:25:36,269 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1138711090, now seen corresponding path program 3 times [2020-10-14 23:25:36,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:36,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308724789] [2020-10-14 23:25:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:36,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:36,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:36,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:25:36,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:36,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-14 23:25:36,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:36,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:36,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:25:36,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:36,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:25:36,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:36,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:36,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:36,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:36,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:36,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:36,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:36,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:36,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:36,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308724789] [2020-10-14 23:25:36,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:36,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:25:36,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066990001] [2020-10-14 23:25:36,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:25:36,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:25:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:36,888 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand 11 states. [2020-10-14 23:25:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:37,489 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-10-14 23:25:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:25:37,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-14 23:25:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:37,491 INFO L225 Difference]: With dead ends: 183 [2020-10-14 23:25:37,491 INFO L226 Difference]: Without dead ends: 165 [2020-10-14 23:25:37,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:25:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-14 23:25:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2020-10-14 23:25:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 23:25:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 200 transitions. [2020-10-14 23:25:37,504 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 200 transitions. Word has length 32 [2020-10-14 23:25:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:37,505 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 200 transitions. [2020-10-14 23:25:37,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:25:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 200 transitions. [2020-10-14 23:25:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:25:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:37,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:37,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:25:37,506 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2008819857, now seen corresponding path program 5 times [2020-10-14 23:25:37,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:37,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178181410] [2020-10-14 23:25:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:37,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:37,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:25:37,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-14 23:25:37,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:37,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:25:37,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:37,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:25:37,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:38,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:38,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:38,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:38,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:38,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:38,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:38,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:38,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178181410] [2020-10-14 23:25:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:38,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:25:38,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993011570] [2020-10-14 23:25:38,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:25:38,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:25:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:38,225 INFO L87 Difference]: Start difference. First operand 150 states and 200 transitions. Second operand 12 states. [2020-10-14 23:25:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:38,900 INFO L93 Difference]: Finished difference Result 174 states and 228 transitions. [2020-10-14 23:25:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:38,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 23:25:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:38,902 INFO L225 Difference]: With dead ends: 174 [2020-10-14 23:25:38,902 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 23:25:38,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 23:25:38,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2020-10-14 23:25:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 23:25:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2020-10-14 23:25:38,915 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 34 [2020-10-14 23:25:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:38,917 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2020-10-14 23:25:38,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:25:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2020-10-14 23:25:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:25:38,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:38,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:38,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:25:38,918 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:38,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2008817935, now seen corresponding path program 4 times [2020-10-14 23:25:38,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:38,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543662310] [2020-10-14 23:25:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:38,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:39,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:39,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:25:39,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:39,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-14 23:25:39,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:39,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:25:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:39,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:25:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:39,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:39,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:39,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:39,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:39,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:39,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:39,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:39,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:39,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543662310] [2020-10-14 23:25:39,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:39,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:25:39,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267993545] [2020-10-14 23:25:39,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:25:39,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:39,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:25:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:39,808 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand 12 states. [2020-10-14 23:25:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:40,470 INFO L93 Difference]: Finished difference Result 207 states and 278 transitions. [2020-10-14 23:25:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:40,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 23:25:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:40,472 INFO L225 Difference]: With dead ends: 207 [2020-10-14 23:25:40,472 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 23:25:40,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:25:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 23:25:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2020-10-14 23:25:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 23:25:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2020-10-14 23:25:40,483 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 34 [2020-10-14 23:25:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:40,484 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2020-10-14 23:25:40,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:25:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2020-10-14 23:25:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:25:40,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:40,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:40,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:25:40,485 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1951561555, now seen corresponding path program 1 times [2020-10-14 23:25:40,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:40,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998037862] [2020-10-14 23:25:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:40,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:40,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:40,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:25:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:25:40,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:41,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:41,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:41,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:41,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:41,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:41,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:41,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:41,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998037862] [2020-10-14 23:25:41,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:41,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:25:41,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594048304] [2020-10-14 23:25:41,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:25:41,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:25:41,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:41,156 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand 12 states. [2020-10-14 23:25:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:41,855 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-14 23:25:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:41,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-14 23:25:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:41,858 INFO L225 Difference]: With dead ends: 179 [2020-10-14 23:25:41,858 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 23:25:41,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:41,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 23:25:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2020-10-14 23:25:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-14 23:25:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 211 transitions. [2020-10-14 23:25:41,870 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 211 transitions. Word has length 34 [2020-10-14 23:25:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:41,871 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 211 transitions. [2020-10-14 23:25:41,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:25:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 211 transitions. [2020-10-14 23:25:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:25:41,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:41,872 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:41,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:25:41,872 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 845765574, now seen corresponding path program 1 times [2020-10-14 23:25:41,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:41,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038234803] [2020-10-14 23:25:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:43,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:43,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:25:43,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:25:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:25:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:43,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:43,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:43,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:43,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:43,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:25:43,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038234803] [2020-10-14 23:25:43,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:43,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:43,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49990858] [2020-10-14 23:25:43,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:43,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:43,177 INFO L87 Difference]: Start difference. First operand 158 states and 211 transitions. Second operand 9 states. [2020-10-14 23:25:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:43,478 INFO L93 Difference]: Finished difference Result 246 states and 327 transitions. [2020-10-14 23:25:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:25:43,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-14 23:25:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:43,482 INFO L225 Difference]: With dead ends: 246 [2020-10-14 23:25:43,482 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 23:25:43,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:25:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 23:25:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2020-10-14 23:25:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 23:25:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 212 transitions. [2020-10-14 23:25:43,497 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 212 transitions. Word has length 34 [2020-10-14 23:25:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:43,498 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 212 transitions. [2020-10-14 23:25:43,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 212 transitions. [2020-10-14 23:25:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:25:43,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:43,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:43,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:25:43,499 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1553079017, now seen corresponding path program 2 times [2020-10-14 23:25:43,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:43,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945768604] [2020-10-14 23:25:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:43,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:44,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:44,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:25:44,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:25:44,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-14 23:25:44,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:44,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:25:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:44,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:25:44,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:44,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:44,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:44,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:44,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:44,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:25:44,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945768604] [2020-10-14 23:25:44,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:44,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:25:44,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397161438] [2020-10-14 23:25:44,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:25:44,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:25:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:44,739 INFO L87 Difference]: Start difference. First operand 159 states and 212 transitions. Second operand 11 states. [2020-10-14 23:25:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:45,290 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2020-10-14 23:25:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:45,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-14 23:25:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:45,292 INFO L225 Difference]: With dead ends: 230 [2020-10-14 23:25:45,293 INFO L226 Difference]: Without dead ends: 228 [2020-10-14 23:25:45,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-14 23:25:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2020-10-14 23:25:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-14 23:25:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2020-10-14 23:25:45,311 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 36 [2020-10-14 23:25:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:45,312 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2020-10-14 23:25:45,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:25:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2020-10-14 23:25:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:25:45,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:45,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:45,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:25:45,313 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1553080939, now seen corresponding path program 4 times [2020-10-14 23:25:45,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:45,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565622226] [2020-10-14 23:25:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:46,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:46,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:25:46,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:25:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-14 23:25:46,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:46,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:25:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:46,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:25:46,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:46,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:46,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:46,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:46,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:46,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:46,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:46,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:46,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:46,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:46,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:25:46,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565622226] [2020-10-14 23:25:46,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:46,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:25:46,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117269626] [2020-10-14 23:25:46,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:25:46,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:25:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:25:46,594 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand 11 states. [2020-10-14 23:25:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:47,286 INFO L93 Difference]: Finished difference Result 378 states and 529 transitions. [2020-10-14 23:25:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:25:47,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-14 23:25:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:47,289 INFO L225 Difference]: With dead ends: 378 [2020-10-14 23:25:47,289 INFO L226 Difference]: Without dead ends: 320 [2020-10-14 23:25:47,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-14 23:25:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 269. [2020-10-14 23:25:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-14 23:25:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2020-10-14 23:25:47,311 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 36 [2020-10-14 23:25:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:47,312 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2020-10-14 23:25:47,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:25:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2020-10-14 23:25:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:25:47,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:47,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:47,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:25:47,314 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1610337319, now seen corresponding path program 2 times [2020-10-14 23:25:47,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:47,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571180836] [2020-10-14 23:25:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:47,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:48,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:25:48,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:25:48,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:48,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:48,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:48,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:48,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:48,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:48,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571180836] [2020-10-14 23:25:48,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:48,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:48,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404488433] [2020-10-14 23:25:48,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:48,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:48,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:48,245 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 9 states. [2020-10-14 23:25:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:48,483 INFO L93 Difference]: Finished difference Result 419 states and 584 transitions. [2020-10-14 23:25:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:25:48,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-14 23:25:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:48,486 INFO L225 Difference]: With dead ends: 419 [2020-10-14 23:25:48,486 INFO L226 Difference]: Without dead ends: 255 [2020-10-14 23:25:48,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:25:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-14 23:25:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2020-10-14 23:25:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-14 23:25:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 330 transitions. [2020-10-14 23:25:48,503 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 330 transitions. Word has length 36 [2020-10-14 23:25:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:48,504 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 330 transitions. [2020-10-14 23:25:48,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 330 transitions. [2020-10-14 23:25:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:25:48,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:48,505 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:48,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:25:48,505 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2103255125, now seen corresponding path program 5 times [2020-10-14 23:25:48,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:48,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799334710] [2020-10-14 23:25:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:48,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:49,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:49,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:49,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:25:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:49,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:49,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:49,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:49,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:49,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:49,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:49,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:49,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:49,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799334710] [2020-10-14 23:25:49,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:49,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:25:49,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257641481] [2020-10-14 23:25:49,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:25:49,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:25:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:25:49,693 INFO L87 Difference]: Start difference. First operand 243 states and 330 transitions. Second operand 10 states. [2020-10-14 23:25:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:50,137 INFO L93 Difference]: Finished difference Result 390 states and 536 transitions. [2020-10-14 23:25:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:25:50,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 23:25:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:50,141 INFO L225 Difference]: With dead ends: 390 [2020-10-14 23:25:50,141 INFO L226 Difference]: Without dead ends: 332 [2020-10-14 23:25:50,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:25:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-14 23:25:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 294. [2020-10-14 23:25:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-14 23:25:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 405 transitions. [2020-10-14 23:25:50,170 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 405 transitions. Word has length 36 [2020-10-14 23:25:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:50,170 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 405 transitions. [2020-10-14 23:25:50,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:25:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 405 transitions. [2020-10-14 23:25:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:25:50,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:50,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:50,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:25:50,172 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1382363623, now seen corresponding path program 3 times [2020-10-14 23:25:50,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:50,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091766715] [2020-10-14 23:25:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:50,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:51,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:51,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:52,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2448 [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:25:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:25:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:52,883 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-14 23:25:52,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:52,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:52,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:52,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:52,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:52,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:52,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:52,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:25:52,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091766715] [2020-10-14 23:25:52,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:52,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:25:52,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021768070] [2020-10-14 23:25:52,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:25:52,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:25:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:25:52,967 INFO L87 Difference]: Start difference. First operand 294 states and 405 transitions. Second operand 10 states. [2020-10-14 23:25:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:53,879 INFO L93 Difference]: Finished difference Result 355 states and 480 transitions. [2020-10-14 23:25:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:25:53,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 23:25:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:53,882 INFO L225 Difference]: With dead ends: 355 [2020-10-14 23:25:53,882 INFO L226 Difference]: Without dead ends: 353 [2020-10-14 23:25:53,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:25:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-14 23:25:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 194. [2020-10-14 23:25:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-14 23:25:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 255 transitions. [2020-10-14 23:25:53,901 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 255 transitions. Word has length 36 [2020-10-14 23:25:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:53,902 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 255 transitions. [2020-10-14 23:25:53,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:25:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 255 transitions. [2020-10-14 23:25:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:25:53,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:53,903 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:53,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:25:53,903 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash 464366204, now seen corresponding path program 3 times [2020-10-14 23:25:53,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:53,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437630948] [2020-10-14 23:25:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:53,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:53,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:54,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:54,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:25:54,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 23:25:54,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:25:54,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:55,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:55,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:55,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:25:55,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437630948] [2020-10-14 23:25:55,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:55,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:25:55,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701016205] [2020-10-14 23:25:55,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:25:55,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:55,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:25:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:25:55,044 INFO L87 Difference]: Start difference. First operand 194 states and 255 transitions. Second operand 9 states. [2020-10-14 23:25:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:55,305 INFO L93 Difference]: Finished difference Result 215 states and 280 transitions. [2020-10-14 23:25:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:25:55,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-14 23:25:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:55,307 INFO L225 Difference]: With dead ends: 215 [2020-10-14 23:25:55,307 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 23:25:55,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:25:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 23:25:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-14 23:25:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 23:25:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2020-10-14 23:25:55,324 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 38 [2020-10-14 23:25:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:55,324 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2020-10-14 23:25:55,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:25:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2020-10-14 23:25:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:25:55,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:55,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:55,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:25:55,326 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:55,326 INFO L82 PathProgramCache]: Analyzing trace with hash -189126004, now seen corresponding path program 3 times [2020-10-14 23:25:55,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:55,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998624141] [2020-10-14 23:25:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:55,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:25:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:25:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:55,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:55,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:55,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:55,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:55,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:55,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:55,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:55,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:25:55,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998624141] [2020-10-14 23:25:55,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:55,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:25:55,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487231109] [2020-10-14 23:25:55,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:25:55,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:55,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:25:55,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:25:55,969 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand 12 states. [2020-10-14 23:25:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:56,302 INFO L93 Difference]: Finished difference Result 252 states and 329 transitions. [2020-10-14 23:25:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:25:56,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-14 23:25:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:56,306 INFO L225 Difference]: With dead ends: 252 [2020-10-14 23:25:56,306 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 23:25:56,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:25:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 23:25:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2020-10-14 23:25:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-14 23:25:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 308 transitions. [2020-10-14 23:25:56,325 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 308 transitions. Word has length 38 [2020-10-14 23:25:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:56,325 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 308 transitions. [2020-10-14 23:25:56,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:25:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 308 transitions. [2020-10-14 23:25:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:25:56,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:56,326 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:56,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:25:56,326 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash -189124082, now seen corresponding path program 6 times [2020-10-14 23:25:56,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:56,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904434531] [2020-10-14 23:25:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:56,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:56,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:56,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:56,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:25:56,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:25:56,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:57,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:57,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:57,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:57,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:57,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:57,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904434531] [2020-10-14 23:25:57,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:57,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:25:57,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031139956] [2020-10-14 23:25:57,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:25:57,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:25:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:25:57,053 INFO L87 Difference]: Start difference. First operand 231 states and 308 transitions. Second operand 13 states. [2020-10-14 23:25:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:57,617 INFO L93 Difference]: Finished difference Result 442 states and 597 transitions. [2020-10-14 23:25:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:25:57,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 23:25:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:57,620 INFO L225 Difference]: With dead ends: 442 [2020-10-14 23:25:57,620 INFO L226 Difference]: Without dead ends: 401 [2020-10-14 23:25:57,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:25:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-14 23:25:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 271. [2020-10-14 23:25:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 23:25:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 364 transitions. [2020-10-14 23:25:57,639 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 364 transitions. Word has length 38 [2020-10-14 23:25:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:57,639 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 364 transitions. [2020-10-14 23:25:57,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:25:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 364 transitions. [2020-10-14 23:25:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:25:57,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:57,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:57,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:25:57,641 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:57,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1200243254, now seen corresponding path program 4 times [2020-10-14 23:25:57,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:57,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240381673] [2020-10-14 23:25:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:58,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:58,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:25:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:25:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:58,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:58,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:58,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:58,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:25:58,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:58,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:58,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:58,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240381673] [2020-10-14 23:25:58,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:58,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:25:58,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514201494] [2020-10-14 23:25:58,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:25:58,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:25:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:25:58,325 INFO L87 Difference]: Start difference. First operand 271 states and 364 transitions. Second operand 13 states. [2020-10-14 23:25:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:25:59,174 INFO L93 Difference]: Finished difference Result 398 states and 529 transitions. [2020-10-14 23:25:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:25:59,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 23:25:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:25:59,177 INFO L225 Difference]: With dead ends: 398 [2020-10-14 23:25:59,178 INFO L226 Difference]: Without dead ends: 396 [2020-10-14 23:25:59,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:25:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-14 23:25:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 306. [2020-10-14 23:25:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-14 23:25:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 415 transitions. [2020-10-14 23:25:59,208 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 415 transitions. Word has length 38 [2020-10-14 23:25:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:25:59,208 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 415 transitions. [2020-10-14 23:25:59,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:25:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 415 transitions. [2020-10-14 23:25:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:25:59,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:25:59,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:25:59,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:25:59,210 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:25:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:25:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -67216395, now seen corresponding path program 6 times [2020-10-14 23:25:59,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:25:59,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318846814] [2020-10-14 23:25:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:25:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:59,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:59,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:25:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:25:59,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:25:59,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:25:59,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:25:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:25:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:25:59,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:25:59,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:25:59,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:25:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:25:59,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:25:59,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:25:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:25:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:25:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:25:59,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:25:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:25:59,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318846814] [2020-10-14 23:25:59,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:25:59,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:25:59,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310793750] [2020-10-14 23:25:59,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:25:59,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:25:59,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:25:59,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:25:59,976 INFO L87 Difference]: Start difference. First operand 306 states and 415 transitions. Second operand 13 states. [2020-10-14 23:26:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:01,000 INFO L93 Difference]: Finished difference Result 345 states and 461 transitions. [2020-10-14 23:26:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:26:01,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 23:26:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:01,007 INFO L225 Difference]: With dead ends: 345 [2020-10-14 23:26:01,007 INFO L226 Difference]: Without dead ends: 343 [2020-10-14 23:26:01,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-14 23:26:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 325. [2020-10-14 23:26:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 23:26:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2020-10-14 23:26:01,035 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 38 [2020-10-14 23:26:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:01,036 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2020-10-14 23:26:01,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2020-10-14 23:26:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:26:01,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:01,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:01,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:26:01,037 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash -67214473, now seen corresponding path program 5 times [2020-10-14 23:26:01,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:01,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958842825] [2020-10-14 23:26:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:01,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:01,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:26:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:01,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-14 23:26:01,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:01,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:26:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:01,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:26:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:26:02,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:02,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:02,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:02,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:02,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958842825] [2020-10-14 23:26:02,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:02,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:02,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203112624] [2020-10-14 23:26:02,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:02,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:02,189 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand 13 states. [2020-10-14 23:26:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:02,987 INFO L93 Difference]: Finished difference Result 384 states and 518 transitions. [2020-10-14 23:26:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:02,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 23:26:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:02,993 INFO L225 Difference]: With dead ends: 384 [2020-10-14 23:26:02,994 INFO L226 Difference]: Without dead ends: 350 [2020-10-14 23:26:02,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:26:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-14 23:26:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 325. [2020-10-14 23:26:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-14 23:26:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 440 transitions. [2020-10-14 23:26:03,023 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 440 transitions. Word has length 38 [2020-10-14 23:26:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:03,023 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 440 transitions. [2020-10-14 23:26:03,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 440 transitions. [2020-10-14 23:26:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:26:03,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:03,024 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:03,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:26:03,024 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash -9958093, now seen corresponding path program 2 times [2020-10-14 23:26:03,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:03,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984838445] [2020-10-14 23:26:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:03,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:03,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:26:03,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:03,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-14 23:26:03,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:03,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:26:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:26:03,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:03,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:03,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:03,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:03,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:03,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984838445] [2020-10-14 23:26:03,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:03,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:03,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606552993] [2020-10-14 23:26:03,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:03,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:03,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:03,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:03,911 INFO L87 Difference]: Start difference. First operand 325 states and 440 transitions. Second operand 13 states. [2020-10-14 23:26:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:04,816 INFO L93 Difference]: Finished difference Result 347 states and 463 transitions. [2020-10-14 23:26:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:04,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 23:26:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:04,818 INFO L225 Difference]: With dead ends: 347 [2020-10-14 23:26:04,818 INFO L226 Difference]: Without dead ends: 345 [2020-10-14 23:26:04,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-14 23:26:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 324. [2020-10-14 23:26:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-14 23:26:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 439 transitions. [2020-10-14 23:26:04,848 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 439 transitions. Word has length 38 [2020-10-14 23:26:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:04,848 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 439 transitions. [2020-10-14 23:26:04,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 439 transitions. [2020-10-14 23:26:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:26:04,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:04,850 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:04,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:26:04,850 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1429151864, now seen corresponding path program 7 times [2020-10-14 23:26:04,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:04,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966778413] [2020-10-14 23:26:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:04,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:04,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:06,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:06,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:26:06,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 23:26:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1834 [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:26:06,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:07,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:07,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:07,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:07,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:07,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:07,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:07,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:26:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:07,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966778413] [2020-10-14 23:26:07,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:07,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:26:07,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400791813] [2020-10-14 23:26:07,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:26:07,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:07,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:26:07,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:26:07,033 INFO L87 Difference]: Start difference. First operand 324 states and 439 transitions. Second operand 10 states. [2020-10-14 23:26:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:07,439 INFO L93 Difference]: Finished difference Result 425 states and 575 transitions. [2020-10-14 23:26:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:26:07,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-14 23:26:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:07,441 INFO L225 Difference]: With dead ends: 425 [2020-10-14 23:26:07,442 INFO L226 Difference]: Without dead ends: 398 [2020-10-14 23:26:07,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-14 23:26:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 354. [2020-10-14 23:26:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-14 23:26:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 480 transitions. [2020-10-14 23:26:07,489 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 480 transitions. Word has length 40 [2020-10-14 23:26:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:07,489 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 480 transitions. [2020-10-14 23:26:07,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:26:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 480 transitions. [2020-10-14 23:26:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:26:07,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:07,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:07,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:26:07,491 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1619848920, now seen corresponding path program 7 times [2020-10-14 23:26:07,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:07,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761283560] [2020-10-14 23:26:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:07,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:07,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:07,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:26:07,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:07,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-14 23:26:07,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:07,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:26:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:07,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:26:07,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:08,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:08,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:08,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:08,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:08,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:08,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:08,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:08,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:08,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:26:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:08,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761283560] [2020-10-14 23:26:08,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:08,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:26:08,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353412306] [2020-10-14 23:26:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:26:08,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:26:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:26:08,228 INFO L87 Difference]: Start difference. First operand 354 states and 480 transitions. Second operand 12 states. [2020-10-14 23:26:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:09,027 INFO L93 Difference]: Finished difference Result 413 states and 559 transitions. [2020-10-14 23:26:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:26:09,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 23:26:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:09,031 INFO L225 Difference]: With dead ends: 413 [2020-10-14 23:26:09,031 INFO L226 Difference]: Without dead ends: 379 [2020-10-14 23:26:09,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-14 23:26:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 370. [2020-10-14 23:26:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-14 23:26:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 499 transitions. [2020-10-14 23:26:09,068 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 499 transitions. Word has length 40 [2020-10-14 23:26:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:09,071 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 499 transitions. [2020-10-14 23:26:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:26:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 499 transitions. [2020-10-14 23:26:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:26:09,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:09,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:09,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:26:09,073 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -876767761, now seen corresponding path program 4 times [2020-10-14 23:26:09,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:09,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737135362] [2020-10-14 23:26:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:09,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:09,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:10,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:10,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:26:10,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:26:10,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-14 23:26:10,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:10,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:26:10,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:26:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:10,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:10,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:10,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737135362] [2020-10-14 23:26:10,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:10,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:26:10,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606583563] [2020-10-14 23:26:10,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:26:10,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:26:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:26:10,673 INFO L87 Difference]: Start difference. First operand 370 states and 499 transitions. Second operand 12 states. [2020-10-14 23:26:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:11,367 INFO L93 Difference]: Finished difference Result 399 states and 530 transitions. [2020-10-14 23:26:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:26:11,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 23:26:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:11,371 INFO L225 Difference]: With dead ends: 399 [2020-10-14 23:26:11,371 INFO L226 Difference]: Without dead ends: 397 [2020-10-14 23:26:11,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:26:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-14 23:26:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 368. [2020-10-14 23:26:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-14 23:26:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 495 transitions. [2020-10-14 23:26:11,401 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 495 transitions. Word has length 40 [2020-10-14 23:26:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:11,402 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 495 transitions. [2020-10-14 23:26:11,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:26:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 495 transitions. [2020-10-14 23:26:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:26:11,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:11,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:11,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:26:11,403 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash -876765839, now seen corresponding path program 8 times [2020-10-14 23:26:11,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:11,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779650624] [2020-10-14 23:26:11,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:11,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:12,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:26:12,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:12,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:12,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:12,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:12,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:12,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:12,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:12,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:12,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779650624] [2020-10-14 23:26:12,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:12,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:26:12,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652637249] [2020-10-14 23:26:12,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:26:12,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:26:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:26:12,705 INFO L87 Difference]: Start difference. First operand 368 states and 495 transitions. Second operand 12 states. [2020-10-14 23:26:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:13,567 INFO L93 Difference]: Finished difference Result 590 states and 802 transitions. [2020-10-14 23:26:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:26:13,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 23:26:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:13,571 INFO L225 Difference]: With dead ends: 590 [2020-10-14 23:26:13,571 INFO L226 Difference]: Without dead ends: 501 [2020-10-14 23:26:13,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:26:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-14 23:26:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 298. [2020-10-14 23:26:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-14 23:26:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 393 transitions. [2020-10-14 23:26:13,599 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 393 transitions. Word has length 40 [2020-10-14 23:26:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:13,599 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 393 transitions. [2020-10-14 23:26:13,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:26:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 393 transitions. [2020-10-14 23:26:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:13,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:13,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:13,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:26:13,601 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1181405486, now seen corresponding path program 5 times [2020-10-14 23:26:13,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:13,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079735033] [2020-10-14 23:26:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:14,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:14,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:14,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:14,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:14,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:14,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:14,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079735033] [2020-10-14 23:26:14,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:14,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:14,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838247848] [2020-10-14 23:26:14,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:14,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:14,702 INFO L87 Difference]: Start difference. First operand 298 states and 393 transitions. Second operand 13 states. [2020-10-14 23:26:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:15,389 INFO L93 Difference]: Finished difference Result 368 states and 479 transitions. [2020-10-14 23:26:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:26:15,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-14 23:26:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:15,394 INFO L225 Difference]: With dead ends: 368 [2020-10-14 23:26:15,394 INFO L226 Difference]: Without dead ends: 366 [2020-10-14 23:26:15,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:26:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-14 23:26:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2020-10-14 23:26:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-14 23:26:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 444 transitions. [2020-10-14 23:26:15,425 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 444 transitions. Word has length 42 [2020-10-14 23:26:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:15,425 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 444 transitions. [2020-10-14 23:26:15,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 444 transitions. [2020-10-14 23:26:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:15,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:15,426 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:15,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:26:15,427 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1181403564, now seen corresponding path program 9 times [2020-10-14 23:26:15,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:15,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293771669] [2020-10-14 23:26:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:15,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:16,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:16,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:26:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:16,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:16,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:16,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:16,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293771669] [2020-10-14 23:26:16,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:16,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:16,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738841035] [2020-10-14 23:26:16,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:16,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:16,675 INFO L87 Difference]: Start difference. First operand 335 states and 444 transitions. Second operand 13 states. [2020-10-14 23:26:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:17,421 INFO L93 Difference]: Finished difference Result 402 states and 530 transitions. [2020-10-14 23:26:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:26:17,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-14 23:26:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:17,424 INFO L225 Difference]: With dead ends: 402 [2020-10-14 23:26:17,424 INFO L226 Difference]: Without dead ends: 380 [2020-10-14 23:26:17,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:26:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-14 23:26:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 352. [2020-10-14 23:26:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-14 23:26:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 466 transitions. [2020-10-14 23:26:17,458 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 466 transitions. Word has length 42 [2020-10-14 23:26:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:17,459 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 466 transitions. [2020-10-14 23:26:17,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 466 transitions. [2020-10-14 23:26:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:17,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:17,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:17,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:26:17,461 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1124147184, now seen corresponding path program 5 times [2020-10-14 23:26:17,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:17,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409525730] [2020-10-14 23:26:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:17,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:17,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:18,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:18,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:18,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 858 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:18,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:18,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:18,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:18,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:18,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:18,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:18,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409525730] [2020-10-14 23:26:18,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:18,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:18,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615632159] [2020-10-14 23:26:18,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:18,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:18,798 INFO L87 Difference]: Start difference. First operand 352 states and 466 transitions. Second operand 13 states. [2020-10-14 23:26:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:19,630 INFO L93 Difference]: Finished difference Result 440 states and 576 transitions. [2020-10-14 23:26:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:19,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-14 23:26:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:19,633 INFO L225 Difference]: With dead ends: 440 [2020-10-14 23:26:19,633 INFO L226 Difference]: Without dead ends: 438 [2020-10-14 23:26:19,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:26:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-14 23:26:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 383. [2020-10-14 23:26:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-14 23:26:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 512 transitions. [2020-10-14 23:26:19,666 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 512 transitions. Word has length 42 [2020-10-14 23:26:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:19,666 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 512 transitions. [2020-10-14 23:26:19,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 512 transitions. [2020-10-14 23:26:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:19,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:19,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:19,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:26:19,668 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1190329362, now seen corresponding path program 6 times [2020-10-14 23:26:19,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:19,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087704175] [2020-10-14 23:26:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:20,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:20,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:20,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:20,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:20,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:20,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:20,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:20,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:20,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:20,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087704175] [2020-10-14 23:26:20,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:20,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:26:20,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911234943] [2020-10-14 23:26:20,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:26:20,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:20,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:26:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:26:20,696 INFO L87 Difference]: Start difference. First operand 383 states and 512 transitions. Second operand 13 states. [2020-10-14 23:26:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:21,836 INFO L93 Difference]: Finished difference Result 490 states and 648 transitions. [2020-10-14 23:26:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:26:21,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-14 23:26:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:21,839 INFO L225 Difference]: With dead ends: 490 [2020-10-14 23:26:21,839 INFO L226 Difference]: Without dead ends: 488 [2020-10-14 23:26:21,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:26:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-14 23:26:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 381. [2020-10-14 23:26:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-14 23:26:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 508 transitions. [2020-10-14 23:26:21,875 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 508 transitions. Word has length 42 [2020-10-14 23:26:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:21,876 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 508 transitions. [2020-10-14 23:26:21,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:26:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 508 transitions. [2020-10-14 23:26:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:21,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:21,877 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:21,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:26:21,878 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1828962516, now seen corresponding path program 10 times [2020-10-14 23:26:21,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:21,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184611024] [2020-10-14 23:26:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:22,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:22,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:24,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:24,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:24,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:26:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2291 [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:24,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:24,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:24,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:24,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:24,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184611024] [2020-10-14 23:26:24,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:24,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:26:24,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068656156] [2020-10-14 23:26:24,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:26:24,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:26:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:26:24,439 INFO L87 Difference]: Start difference. First operand 381 states and 508 transitions. Second operand 11 states. [2020-10-14 23:26:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:24,820 INFO L93 Difference]: Finished difference Result 650 states and 874 transitions. [2020-10-14 23:26:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:26:24,821 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-14 23:26:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:24,823 INFO L225 Difference]: With dead ends: 650 [2020-10-14 23:26:24,823 INFO L226 Difference]: Without dead ends: 551 [2020-10-14 23:26:24,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:26:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2020-10-14 23:26:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 441. [2020-10-14 23:26:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-14 23:26:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 592 transitions. [2020-10-14 23:26:24,857 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 592 transitions. Word has length 42 [2020-10-14 23:26:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:24,857 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 592 transitions. [2020-10-14 23:26:24,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:26:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 592 transitions. [2020-10-14 23:26:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:24,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:24,859 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:24,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:26:24,859 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1312238971, now seen corresponding path program 8 times [2020-10-14 23:26:24,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:24,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608204394] [2020-10-14 23:26:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:24,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:25,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:25,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:25,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:25,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-14 23:26:25,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:25,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:25,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:26,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:26,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:26,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:26,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:26,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:26,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:26,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:26,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:26,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608204394] [2020-10-14 23:26:26,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:26,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:26:26,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760173782] [2020-10-14 23:26:26,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:26:26,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:26:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:26:26,091 INFO L87 Difference]: Start difference. First operand 441 states and 592 transitions. Second operand 14 states. [2020-10-14 23:26:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:27,130 INFO L93 Difference]: Finished difference Result 463 states and 615 transitions. [2020-10-14 23:26:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:26:27,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-14 23:26:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:27,133 INFO L225 Difference]: With dead ends: 463 [2020-10-14 23:26:27,133 INFO L226 Difference]: Without dead ends: 461 [2020-10-14 23:26:27,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:26:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-14 23:26:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 442. [2020-10-14 23:26:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-14 23:26:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 594 transitions. [2020-10-14 23:26:27,177 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 594 transitions. Word has length 42 [2020-10-14 23:26:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:27,178 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 594 transitions. [2020-10-14 23:26:27,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:26:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 594 transitions. [2020-10-14 23:26:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:27,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:27,179 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:27,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:26:27,179 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1312240893, now seen corresponding path program 6 times [2020-10-14 23:26:27,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:27,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776862963] [2020-10-14 23:26:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:27,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:27,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:28,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:28,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:28,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:28,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:28,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:28,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:28,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:28,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776862963] [2020-10-14 23:26:28,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:28,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:26:28,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219471890] [2020-10-14 23:26:28,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:26:28,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:26:28,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:26:28,240 INFO L87 Difference]: Start difference. First operand 442 states and 594 transitions. Second operand 14 states. [2020-10-14 23:26:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:29,292 INFO L93 Difference]: Finished difference Result 510 states and 684 transitions. [2020-10-14 23:26:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:29,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-14 23:26:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:29,295 INFO L225 Difference]: With dead ends: 510 [2020-10-14 23:26:29,295 INFO L226 Difference]: Without dead ends: 466 [2020-10-14 23:26:29,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-14 23:26:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 440. [2020-10-14 23:26:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-14 23:26:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 590 transitions. [2020-10-14 23:26:29,338 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 590 transitions. Word has length 42 [2020-10-14 23:26:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:29,338 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 590 transitions. [2020-10-14 23:26:29,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:26:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 590 transitions. [2020-10-14 23:26:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:26:29,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:29,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:29,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:26:29,340 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1369497273, now seen corresponding path program 3 times [2020-10-14 23:26:29,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:29,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664004063] [2020-10-14 23:26:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:29,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:29,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:29,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:30,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:30,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:30,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:30,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:30,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:30,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:30,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:30,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664004063] [2020-10-14 23:26:30,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:30,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:26:30,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772630317] [2020-10-14 23:26:30,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:26:30,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:30,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:26:30,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:26:30,351 INFO L87 Difference]: Start difference. First operand 440 states and 590 transitions. Second operand 14 states. [2020-10-14 23:26:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:31,467 INFO L93 Difference]: Finished difference Result 463 states and 614 transitions. [2020-10-14 23:26:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:31,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-14 23:26:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:31,470 INFO L225 Difference]: With dead ends: 463 [2020-10-14 23:26:31,470 INFO L226 Difference]: Without dead ends: 461 [2020-10-14 23:26:31,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:26:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-14 23:26:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 421. [2020-10-14 23:26:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-14 23:26:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 565 transitions. [2020-10-14 23:26:31,511 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 565 transitions. Word has length 42 [2020-10-14 23:26:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:31,512 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 565 transitions. [2020-10-14 23:26:31,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:26:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 565 transitions. [2020-10-14 23:26:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:31,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:31,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:31,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:26:31,519 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1077037003, now seen corresponding path program 7 times [2020-10-14 23:26:31,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:31,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485060683] [2020-10-14 23:26:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:32,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:26:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:32,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:26:32,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:32,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:32,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:32,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:32,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:32,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:32,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:32,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:32,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:32,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485060683] [2020-10-14 23:26:32,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:32,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:26:32,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867091499] [2020-10-14 23:26:32,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:26:32,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:26:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:26:32,561 INFO L87 Difference]: Start difference. First operand 421 states and 565 transitions. Second operand 11 states. [2020-10-14 23:26:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:33,142 INFO L93 Difference]: Finished difference Result 608 states and 817 transitions. [2020-10-14 23:26:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:26:33,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-14 23:26:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:33,144 INFO L225 Difference]: With dead ends: 608 [2020-10-14 23:26:33,145 INFO L226 Difference]: Without dead ends: 503 [2020-10-14 23:26:33,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:26:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-10-14 23:26:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 468. [2020-10-14 23:26:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-14 23:26:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 622 transitions. [2020-10-14 23:26:33,179 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 622 transitions. Word has length 44 [2020-10-14 23:26:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:33,179 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 622 transitions. [2020-10-14 23:26:33,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:26:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 622 transitions. [2020-10-14 23:26:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:33,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:33,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:26:33,180 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:33,180 INFO L82 PathProgramCache]: Analyzing trace with hash 131561182, now seen corresponding path program 9 times [2020-10-14 23:26:33,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:33,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988844538] [2020-10-14 23:26:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:33,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:33,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:33,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:26:33,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:33,930 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-14 23:26:34,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:34,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:34,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:34,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:34,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:34,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:34,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:34,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:34,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:34,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:26:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:34,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988844538] [2020-10-14 23:26:34,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:34,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:26:34,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671456745] [2020-10-14 23:26:34,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:26:34,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:26:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:26:34,273 INFO L87 Difference]: Start difference. First operand 468 states and 622 transitions. Second operand 15 states. [2020-10-14 23:26:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:35,481 INFO L93 Difference]: Finished difference Result 535 states and 703 transitions. [2020-10-14 23:26:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:26:35,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 23:26:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:35,484 INFO L225 Difference]: With dead ends: 535 [2020-10-14 23:26:35,484 INFO L226 Difference]: Without dead ends: 533 [2020-10-14 23:26:35,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:26:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-14 23:26:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 492. [2020-10-14 23:26:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2020-10-14 23:26:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 654 transitions. [2020-10-14 23:26:35,525 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 654 transitions. Word has length 44 [2020-10-14 23:26:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:35,525 INFO L479 AbstractCegarLoop]: Abstraction has 492 states and 654 transitions. [2020-10-14 23:26:35,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:26:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 654 transitions. [2020-10-14 23:26:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:35,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:35,526 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:35,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:26:35,527 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash 131563104, now seen corresponding path program 7 times [2020-10-14 23:26:35,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:35,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759502332] [2020-10-14 23:26:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:36,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:36,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:26:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:36,653 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-14 23:26:36,770 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-14 23:26:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:37,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:37,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:37,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:37,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759502332] [2020-10-14 23:26:37,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:37,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:26:37,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807643251] [2020-10-14 23:26:37,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:26:37,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:26:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:26:37,061 INFO L87 Difference]: Start difference. First operand 492 states and 654 transitions. Second operand 15 states. [2020-10-14 23:26:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:38,357 INFO L93 Difference]: Finished difference Result 600 states and 797 transitions. [2020-10-14 23:26:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:26:38,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 23:26:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:38,359 INFO L225 Difference]: With dead ends: 600 [2020-10-14 23:26:38,360 INFO L226 Difference]: Without dead ends: 556 [2020-10-14 23:26:38,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-14 23:26:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 502. [2020-10-14 23:26:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-14 23:26:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 667 transitions. [2020-10-14 23:26:38,395 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 667 transitions. Word has length 44 [2020-10-14 23:26:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:38,396 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 667 transitions. [2020-10-14 23:26:38,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:26:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 667 transitions. [2020-10-14 23:26:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:38,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:38,397 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:38,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:26:38,397 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash 188819484, now seen corresponding path program 4 times [2020-10-14 23:26:38,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:38,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120731275] [2020-10-14 23:26:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:38,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:38,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:26:38,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:39,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:39,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:39,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:39,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:39,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:39,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:39,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120731275] [2020-10-14 23:26:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:26:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927957128] [2020-10-14 23:26:39,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:26:39,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:26:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:26:39,503 INFO L87 Difference]: Start difference. First operand 502 states and 667 transitions. Second operand 15 states. [2020-10-14 23:26:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:40,760 INFO L93 Difference]: Finished difference Result 551 states and 724 transitions. [2020-10-14 23:26:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:26:40,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 23:26:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:40,763 INFO L225 Difference]: With dead ends: 551 [2020-10-14 23:26:40,763 INFO L226 Difference]: Without dead ends: 549 [2020-10-14 23:26:40,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:26:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-14 23:26:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 503. [2020-10-14 23:26:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-14 23:26:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 668 transitions. [2020-10-14 23:26:40,805 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 668 transitions. Word has length 44 [2020-10-14 23:26:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:40,805 INFO L479 AbstractCegarLoop]: Abstraction has 503 states and 668 transitions. [2020-10-14 23:26:40,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:26:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 668 transitions. [2020-10-14 23:26:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:40,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:40,807 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:40,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:26:40,807 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 389726620, now seen corresponding path program 5 times [2020-10-14 23:26:40,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:40,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605086388] [2020-10-14 23:26:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:40,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:41,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:41,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:41,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-14 23:26:41,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:41,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:26:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:42,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:42,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:42,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:42,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:42,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:42,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:42,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:42,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:42,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:26:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:42,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605086388] [2020-10-14 23:26:42,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:42,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:26:42,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003032680] [2020-10-14 23:26:42,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:26:42,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:42,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:26:42,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:26:42,506 INFO L87 Difference]: Start difference. First operand 503 states and 668 transitions. Second operand 15 states. [2020-10-14 23:26:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:43,709 INFO L93 Difference]: Finished difference Result 551 states and 723 transitions. [2020-10-14 23:26:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:26:43,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 23:26:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:43,712 INFO L225 Difference]: With dead ends: 551 [2020-10-14 23:26:43,712 INFO L226 Difference]: Without dead ends: 549 [2020-10-14 23:26:43,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:26:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-14 23:26:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 501. [2020-10-14 23:26:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-14 23:26:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 665 transitions. [2020-10-14 23:26:43,763 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 665 transitions. Word has length 44 [2020-10-14 23:26:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:43,764 INFO L479 AbstractCegarLoop]: Abstraction has 501 states and 665 transitions. [2020-10-14 23:26:43,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:26:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 665 transitions. [2020-10-14 23:26:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:26:43,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:43,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:43,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:26:43,766 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 446984922, now seen corresponding path program 6 times [2020-10-14 23:26:43,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:43,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507871539] [2020-10-14 23:26:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:44,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:26:44,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:44,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:44,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:44,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:26:44,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507871539] [2020-10-14 23:26:44,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:44,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:26:44,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136041179] [2020-10-14 23:26:44,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:26:44,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:44,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:26:44,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:26:44,901 INFO L87 Difference]: Start difference. First operand 501 states and 665 transitions. Second operand 15 states. [2020-10-14 23:26:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:46,218 INFO L93 Difference]: Finished difference Result 556 states and 729 transitions. [2020-10-14 23:26:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:26:46,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 23:26:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:46,221 INFO L225 Difference]: With dead ends: 556 [2020-10-14 23:26:46,221 INFO L226 Difference]: Without dead ends: 554 [2020-10-14 23:26:46,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:26:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-10-14 23:26:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 500. [2020-10-14 23:26:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-14 23:26:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 664 transitions. [2020-10-14 23:26:46,265 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 664 transitions. Word has length 44 [2020-10-14 23:26:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:46,265 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 664 transitions. [2020-10-14 23:26:46,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:26:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 664 transitions. [2020-10-14 23:26:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:26:46,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:46,267 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:46,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:26:46,267 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:46,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1285214559, now seen corresponding path program 4 times [2020-10-14 23:26:46,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:46,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940862333] [2020-10-14 23:26:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:46,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:46,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:47,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:26:47,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:47,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:47,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:47,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:47,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:47,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:26:47,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:47,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:47,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:47,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:26:47,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940862333] [2020-10-14 23:26:47,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:47,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:26:47,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485195356] [2020-10-14 23:26:47,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:26:47,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:26:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:26:47,596 INFO L87 Difference]: Start difference. First operand 500 states and 664 transitions. Second operand 10 states. [2020-10-14 23:26:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:47,929 INFO L93 Difference]: Finished difference Result 538 states and 708 transitions. [2020-10-14 23:26:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:26:47,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-14 23:26:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:47,932 INFO L225 Difference]: With dead ends: 538 [2020-10-14 23:26:47,932 INFO L226 Difference]: Without dead ends: 527 [2020-10-14 23:26:47,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:26:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-10-14 23:26:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 508. [2020-10-14 23:26:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-14 23:26:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 673 transitions. [2020-10-14 23:26:47,970 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 673 transitions. Word has length 46 [2020-10-14 23:26:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:47,970 INFO L479 AbstractCegarLoop]: Abstraction has 508 states and 673 transitions. [2020-10-14 23:26:47,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:26:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 673 transitions. [2020-10-14 23:26:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:26:47,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:47,972 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] [2020-10-14 23:26:47,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:26:47,972 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -13129999, now seen corresponding path program 11 times [2020-10-14 23:26:47,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:47,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895837319] [2020-10-14 23:26:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:48,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:49,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:51,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:26:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3057 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:26:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:51,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:51,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:51,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:51,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:26:51,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:51,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:51,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:51,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:51,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895837319] [2020-10-14 23:26:51,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:51,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:26:51,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833127718] [2020-10-14 23:26:51,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:26:51,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:26:51,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:26:51,552 INFO L87 Difference]: Start difference. First operand 508 states and 673 transitions. Second operand 11 states. [2020-10-14 23:26:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:51,965 INFO L93 Difference]: Finished difference Result 580 states and 760 transitions. [2020-10-14 23:26:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:26:51,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-14 23:26:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:51,968 INFO L225 Difference]: With dead ends: 580 [2020-10-14 23:26:51,968 INFO L226 Difference]: Without dead ends: 554 [2020-10-14 23:26:51,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:26:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-10-14 23:26:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 522. [2020-10-14 23:26:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-14 23:26:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 690 transitions. [2020-10-14 23:26:52,026 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 690 transitions. Word has length 46 [2020-10-14 23:26:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:52,026 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 690 transitions. [2020-10-14 23:26:52,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:26:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 690 transitions. [2020-10-14 23:26:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:26:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:52,028 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:52,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:26:52,029 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1201812136, now seen corresponding path program 8 times [2020-10-14 23:26:52,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:52,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008951116] [2020-10-14 23:26:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:52,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:53,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:53,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:26:53,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:26:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1445 [2020-10-14 23:26:53,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:53,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:53,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:53,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:26:53,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:54,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:54,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:54,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:54,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:54,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008951116] [2020-10-14 23:26:54,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:54,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:26:54,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191779328] [2020-10-14 23:26:54,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:26:54,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:26:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:26:54,057 INFO L87 Difference]: Start difference. First operand 522 states and 690 transitions. Second operand 14 states. [2020-10-14 23:26:54,502 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-14 23:26:55,366 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-14 23:26:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:55,457 INFO L93 Difference]: Finished difference Result 668 states and 868 transitions. [2020-10-14 23:26:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:26:55,458 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-14 23:26:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:55,461 INFO L225 Difference]: With dead ends: 668 [2020-10-14 23:26:55,461 INFO L226 Difference]: Without dead ends: 666 [2020-10-14 23:26:55,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:26:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2020-10-14 23:26:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 575. [2020-10-14 23:26:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-14 23:26:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 763 transitions. [2020-10-14 23:26:55,532 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 763 transitions. Word has length 46 [2020-10-14 23:26:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:55,533 INFO L479 AbstractCegarLoop]: Abstraction has 575 states and 763 transitions. [2020-10-14 23:26:55,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:26:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 763 transitions. [2020-10-14 23:26:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:26:55,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:55,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:55,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:26:55,536 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:55,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1201810214, now seen corresponding path program 12 times [2020-10-14 23:26:55,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:55,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36580541] [2020-10-14 23:26:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:55,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:55,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:56,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:56,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:56,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:26:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:57,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:26:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:57,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:26:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:26:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:26:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:26:57,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36580541] [2020-10-14 23:26:57,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:26:57,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:26:57,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549281689] [2020-10-14 23:26:57,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:26:57,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:26:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:26:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:26:57,444 INFO L87 Difference]: Start difference. First operand 575 states and 763 transitions. Second operand 14 states. [2020-10-14 23:26:57,885 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-14 23:26:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:26:58,649 INFO L93 Difference]: Finished difference Result 717 states and 941 transitions. [2020-10-14 23:26:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:26:58,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-14 23:26:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:26:58,653 INFO L225 Difference]: With dead ends: 717 [2020-10-14 23:26:58,653 INFO L226 Difference]: Without dead ends: 685 [2020-10-14 23:26:58,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:26:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-10-14 23:26:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 591. [2020-10-14 23:26:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-14 23:26:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 784 transitions. [2020-10-14 23:26:58,702 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 784 transitions. Word has length 46 [2020-10-14 23:26:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:26:58,703 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 784 transitions. [2020-10-14 23:26:58,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:26:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 784 transitions. [2020-10-14 23:26:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:26:58,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:26:58,704 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:26:58,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:26:58,705 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:26:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:26:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1144553834, now seen corresponding path program 6 times [2020-10-14 23:26:58,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:26:58,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989829479] [2020-10-14 23:26:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:26:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:26:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:58,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:26:59,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:26:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:26:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:00,140 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-14 23:27:00,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:00,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:00,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:00,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:00,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:00,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:00,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989829479] [2020-10-14 23:27:00,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:00,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:27:00,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756312279] [2020-10-14 23:27:00,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:27:00,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:27:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:27:00,503 INFO L87 Difference]: Start difference. First operand 591 states and 784 transitions. Second operand 14 states. [2020-10-14 23:27:00,982 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-14 23:27:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:01,950 INFO L93 Difference]: Finished difference Result 686 states and 890 transitions. [2020-10-14 23:27:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:27:01,951 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-14 23:27:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:01,954 INFO L225 Difference]: With dead ends: 686 [2020-10-14 23:27:01,954 INFO L226 Difference]: Without dead ends: 684 [2020-10-14 23:27:01,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:27:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-14 23:27:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 591. [2020-10-14 23:27:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-14 23:27:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 784 transitions. [2020-10-14 23:27:02,004 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 784 transitions. Word has length 46 [2020-10-14 23:27:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:02,004 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 784 transitions. [2020-10-14 23:27:02,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:27:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 784 transitions. [2020-10-14 23:27:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:27:02,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:02,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:02,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:27:02,006 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1169922712, now seen corresponding path program 9 times [2020-10-14 23:27:02,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:02,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522738045] [2020-10-14 23:27:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:02,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:27:02,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:27:02,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:03,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:03,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:03,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:03,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:03,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:03,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:27:03,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:03,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:27:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:03,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522738045] [2020-10-14 23:27:03,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:03,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:27:03,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023309254] [2020-10-14 23:27:03,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:27:03,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:27:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:27:03,199 INFO L87 Difference]: Start difference. First operand 591 states and 784 transitions. Second operand 13 states. [2020-10-14 23:27:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:04,154 INFO L93 Difference]: Finished difference Result 811 states and 1048 transitions. [2020-10-14 23:27:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:27:04,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-14 23:27:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:04,157 INFO L225 Difference]: With dead ends: 811 [2020-10-14 23:27:04,157 INFO L226 Difference]: Without dead ends: 809 [2020-10-14 23:27:04,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:27:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-14 23:27:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 491. [2020-10-14 23:27:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-14 23:27:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 645 transitions. [2020-10-14 23:27:04,196 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 645 transitions. Word has length 46 [2020-10-14 23:27:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:04,196 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 645 transitions. [2020-10-14 23:27:04,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:27:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 645 transitions. [2020-10-14 23:27:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:04,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:04,197 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:04,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:27:04,198 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:04,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1145696251, now seen corresponding path program 10 times [2020-10-14 23:27:04,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:04,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124497141] [2020-10-14 23:27:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:04,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:04,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:05,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:05,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:05,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:27:05,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:05,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:05,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124497141] [2020-10-14 23:27:05,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:05,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:27:05,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878937809] [2020-10-14 23:27:05,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:27:05,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:27:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:27:05,691 INFO L87 Difference]: Start difference. First operand 491 states and 645 transitions. Second operand 13 states. [2020-10-14 23:27:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:06,812 INFO L93 Difference]: Finished difference Result 837 states and 1105 transitions. [2020-10-14 23:27:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:27:06,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-14 23:27:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:06,815 INFO L225 Difference]: With dead ends: 837 [2020-10-14 23:27:06,815 INFO L226 Difference]: Without dead ends: 587 [2020-10-14 23:27:06,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:27:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-14 23:27:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 531. [2020-10-14 23:27:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-10-14 23:27:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 694 transitions. [2020-10-14 23:27:06,868 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 694 transitions. Word has length 48 [2020-10-14 23:27:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:06,868 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 694 transitions. [2020-10-14 23:27:06,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:27:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 694 transitions. [2020-10-14 23:27:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:06,870 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:06,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:27:06,870 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 787010749, now seen corresponding path program 13 times [2020-10-14 23:27:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839982516] [2020-10-14 23:27:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:06,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:07,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:07,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:07,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:07,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:27:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-14 23:27:07,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:07,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:27:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:08,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:08,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:08,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839982516] [2020-10-14 23:27:08,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:08,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:27:08,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084385939] [2020-10-14 23:27:08,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:27:08,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:27:08,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:27:08,466 INFO L87 Difference]: Start difference. First operand 531 states and 694 transitions. Second operand 14 states. [2020-10-14 23:27:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:09,448 INFO L93 Difference]: Finished difference Result 691 states and 900 transitions. [2020-10-14 23:27:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:27:09,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 23:27:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:09,451 INFO L225 Difference]: With dead ends: 691 [2020-10-14 23:27:09,451 INFO L226 Difference]: Without dead ends: 659 [2020-10-14 23:27:09,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:27:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-14 23:27:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 579. [2020-10-14 23:27:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-14 23:27:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 759 transitions. [2020-10-14 23:27:09,501 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 759 transitions. Word has length 48 [2020-10-14 23:27:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:09,501 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 759 transitions. [2020-10-14 23:27:09,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:27:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 759 transitions. [2020-10-14 23:27:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:09,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:09,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:09,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 23:27:09,503 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1045174265, now seen corresponding path program 7 times [2020-10-14 23:27:09,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:09,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405500177] [2020-10-14 23:27:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:09,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:10,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:11,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:11,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:11,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:11,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:11,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:11,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:11,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405500177] [2020-10-14 23:27:11,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:11,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:27:11,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538996375] [2020-10-14 23:27:11,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:27:11,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:27:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:27:11,768 INFO L87 Difference]: Start difference. First operand 579 states and 759 transitions. Second operand 14 states. [2020-10-14 23:27:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:12,650 INFO L93 Difference]: Finished difference Result 690 states and 891 transitions. [2020-10-14 23:27:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:27:12,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 23:27:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:12,655 INFO L225 Difference]: With dead ends: 690 [2020-10-14 23:27:12,655 INFO L226 Difference]: Without dead ends: 688 [2020-10-14 23:27:12,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:27:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-10-14 23:27:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 579. [2020-10-14 23:27:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-14 23:27:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 759 transitions. [2020-10-14 23:27:12,730 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 759 transitions. Word has length 48 [2020-10-14 23:27:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:12,731 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 759 transitions. [2020-10-14 23:27:12,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:27:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 759 transitions. [2020-10-14 23:27:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:12,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:12,734 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:12,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 23:27:12,734 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1102432567, now seen corresponding path program 8 times [2020-10-14 23:27:12,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:12,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093515677] [2020-10-14 23:27:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:12,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:14,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:14,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:27:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2044 [2020-10-14 23:27:14,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:14,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:14,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:15,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:15,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:15,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:15,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:15,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:15,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:15,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093515677] [2020-10-14 23:27:15,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:15,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:27:15,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700428299] [2020-10-14 23:27:15,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:27:15,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:15,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:27:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:27:15,488 INFO L87 Difference]: Start difference. First operand 579 states and 759 transitions. Second operand 14 states. [2020-10-14 23:27:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:16,348 INFO L93 Difference]: Finished difference Result 658 states and 847 transitions. [2020-10-14 23:27:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:27:16,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 23:27:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:16,351 INFO L225 Difference]: With dead ends: 658 [2020-10-14 23:27:16,351 INFO L226 Difference]: Without dead ends: 656 [2020-10-14 23:27:16,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:27:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-10-14 23:27:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 500. [2020-10-14 23:27:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-14 23:27:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 647 transitions. [2020-10-14 23:27:16,406 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 647 transitions. Word has length 48 [2020-10-14 23:27:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:16,407 INFO L479 AbstractCegarLoop]: Abstraction has 500 states and 647 transitions. [2020-10-14 23:27:16,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:27:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 647 transitions. [2020-10-14 23:27:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:16,408 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:16,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 23:27:16,408 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1136223621, now seen corresponding path program 11 times [2020-10-14 23:27:16,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:16,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874569325] [2020-10-14 23:27:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:16,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:17,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:17,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:17,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:17,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:17,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:17,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:17,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:17,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:17,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:17,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:27:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:17,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874569325] [2020-10-14 23:27:17,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:17,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:27:17,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595712987] [2020-10-14 23:27:17,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:27:17,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:27:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:27:17,745 INFO L87 Difference]: Start difference. First operand 500 states and 647 transitions. Second operand 15 states. [2020-10-14 23:27:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:18,878 INFO L93 Difference]: Finished difference Result 694 states and 901 transitions. [2020-10-14 23:27:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:27:18,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-14 23:27:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:18,882 INFO L225 Difference]: With dead ends: 694 [2020-10-14 23:27:18,882 INFO L226 Difference]: Without dead ends: 692 [2020-10-14 23:27:18,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:27:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-14 23:27:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 625. [2020-10-14 23:27:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-14 23:27:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 824 transitions. [2020-10-14 23:27:18,931 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 824 transitions. Word has length 48 [2020-10-14 23:27:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:18,931 INFO L479 AbstractCegarLoop]: Abstraction has 625 states and 824 transitions. [2020-10-14 23:27:18,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:27:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 824 transitions. [2020-10-14 23:27:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:18,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:18,934 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:18,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 23:27:18,935 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:18,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1136221699, now seen corresponding path program 14 times [2020-10-14 23:27:18,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:18,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537914104] [2020-10-14 23:27:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:20,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:27:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:20,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:27:20,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:20,458 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-14 23:27:20,654 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2020-10-14 23:27:20,812 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-10-14 23:27:20,995 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2020-10-14 23:27:21,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:21,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:21,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:21,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:21,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:21,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:21,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:21,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:21,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:27:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:21,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537914104] [2020-10-14 23:27:21,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:21,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:21,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29608645] [2020-10-14 23:27:21,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:21,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:21,246 INFO L87 Difference]: Start difference. First operand 625 states and 824 transitions. Second operand 16 states. [2020-10-14 23:27:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:22,739 INFO L93 Difference]: Finished difference Result 910 states and 1208 transitions. [2020-10-14 23:27:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:27:22,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:22,744 INFO L225 Difference]: With dead ends: 910 [2020-10-14 23:27:22,744 INFO L226 Difference]: Without dead ends: 832 [2020-10-14 23:27:22,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:27:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2020-10-14 23:27:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 710. [2020-10-14 23:27:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710 states. [2020-10-14 23:27:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 942 transitions. [2020-10-14 23:27:22,852 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 942 transitions. Word has length 48 [2020-10-14 23:27:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:22,854 INFO L479 AbstractCegarLoop]: Abstraction has 710 states and 942 transitions. [2020-10-14 23:27:22,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 942 transitions. [2020-10-14 23:27:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:22,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:22,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:22,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 23:27:22,856 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1953872071, now seen corresponding path program 9 times [2020-10-14 23:27:22,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:22,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292273350] [2020-10-14 23:27:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:22,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:23,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:23,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:27:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:24,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:24,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:24,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:24,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292273350] [2020-10-14 23:27:24,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:24,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:24,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085618445] [2020-10-14 23:27:24,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:24,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:24,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:24,454 INFO L87 Difference]: Start difference. First operand 710 states and 942 transitions. Second operand 16 states. [2020-10-14 23:27:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:26,385 INFO L93 Difference]: Finished difference Result 884 states and 1162 transitions. [2020-10-14 23:27:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:27:26,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:26,389 INFO L225 Difference]: With dead ends: 884 [2020-10-14 23:27:26,390 INFO L226 Difference]: Without dead ends: 882 [2020-10-14 23:27:26,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:27:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-10-14 23:27:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 758. [2020-10-14 23:27:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 758 states. [2020-10-14 23:27:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1009 transitions. [2020-10-14 23:27:26,449 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1009 transitions. Word has length 48 [2020-10-14 23:27:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:26,449 INFO L479 AbstractCegarLoop]: Abstraction has 758 states and 1009 transitions. [2020-10-14 23:27:26,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1009 transitions. [2020-10-14 23:27:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:26,450 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:26,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 23:27:26,451 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1896613769, now seen corresponding path program 10 times [2020-10-14 23:27:26,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:26,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217437732] [2020-10-14 23:27:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:27,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:27,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:27,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:27:27,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-14 23:27:27,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:27,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:27:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:27,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:27:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:27,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:27,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:27:27,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217437732] [2020-10-14 23:27:27,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:27,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:27:27,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090305133] [2020-10-14 23:27:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:27:27,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:27,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:27:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:27:27,748 INFO L87 Difference]: Start difference. First operand 758 states and 1009 transitions. Second operand 10 states. [2020-10-14 23:27:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:28,124 INFO L93 Difference]: Finished difference Result 1290 states and 1724 transitions. [2020-10-14 23:27:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:27:28,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-14 23:27:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:28,128 INFO L225 Difference]: With dead ends: 1290 [2020-10-14 23:27:28,128 INFO L226 Difference]: Without dead ends: 736 [2020-10-14 23:27:28,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:27:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-14 23:27:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 717. [2020-10-14 23:27:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-14 23:27:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 939 transitions. [2020-10-14 23:27:28,188 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 939 transitions. Word has length 48 [2020-10-14 23:27:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:28,189 INFO L479 AbstractCegarLoop]: Abstraction has 717 states and 939 transitions. [2020-10-14 23:27:28,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:27:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 939 transitions. [2020-10-14 23:27:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:28,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:28,190 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:28,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 23:27:28,190 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:28,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1329977975, now seen corresponding path program 11 times [2020-10-14 23:27:28,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:28,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024582769] [2020-10-14 23:27:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:29,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:29,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:29,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:29,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:29,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:29,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:29,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:29,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:29,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:29,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:29,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024582769] [2020-10-14 23:27:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:29,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124856097] [2020-10-14 23:27:29,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:29,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:29,861 INFO L87 Difference]: Start difference. First operand 717 states and 939 transitions. Second operand 16 states. [2020-10-14 23:27:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:31,090 INFO L93 Difference]: Finished difference Result 879 states and 1144 transitions. [2020-10-14 23:27:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:27:31,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:31,096 INFO L225 Difference]: With dead ends: 879 [2020-10-14 23:27:31,096 INFO L226 Difference]: Without dead ends: 877 [2020-10-14 23:27:31,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:27:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2020-10-14 23:27:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 608. [2020-10-14 23:27:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-14 23:27:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 795 transitions. [2020-10-14 23:27:31,149 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 795 transitions. Word has length 48 [2020-10-14 23:27:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:31,149 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 795 transitions. [2020-10-14 23:27:31,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 795 transitions. [2020-10-14 23:27:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:31,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:31,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:31,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 23:27:31,150 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1995607012, now seen corresponding path program 10 times [2020-10-14 23:27:31,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:31,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458312366] [2020-10-14 23:27:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:31,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:31,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:31,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:31,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:32,271 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-14 23:27:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:32,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:32,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:32,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:32,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:32,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458312366] [2020-10-14 23:27:32,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:32,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:32,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269156547] [2020-10-14 23:27:32,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:32,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:32,770 INFO L87 Difference]: Start difference. First operand 608 states and 795 transitions. Second operand 16 states. [2020-10-14 23:27:33,565 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-14 23:27:33,960 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-14 23:27:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:34,597 INFO L93 Difference]: Finished difference Result 685 states and 887 transitions. [2020-10-14 23:27:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:27:34,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:34,601 INFO L225 Difference]: With dead ends: 685 [2020-10-14 23:27:34,601 INFO L226 Difference]: Without dead ends: 683 [2020-10-14 23:27:34,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-14 23:27:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 633. [2020-10-14 23:27:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-14 23:27:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 829 transitions. [2020-10-14 23:27:34,654 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 829 transitions. Word has length 48 [2020-10-14 23:27:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:34,654 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 829 transitions. [2020-10-14 23:27:34,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 829 transitions. [2020-10-14 23:27:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:34,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:34,655 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:34,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 23:27:34,655 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1995608934, now seen corresponding path program 8 times [2020-10-14 23:27:34,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:34,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244709488] [2020-10-14 23:27:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 995 [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:36,077 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-14 23:27:36,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:36,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:36,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244709488] [2020-10-14 23:27:36,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:36,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:36,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556672946] [2020-10-14 23:27:36,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:36,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:36,648 INFO L87 Difference]: Start difference. First operand 633 states and 829 transitions. Second operand 16 states. [2020-10-14 23:27:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:38,021 INFO L93 Difference]: Finished difference Result 756 states and 987 transitions. [2020-10-14 23:27:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:27:38,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:38,024 INFO L225 Difference]: With dead ends: 756 [2020-10-14 23:27:38,025 INFO L226 Difference]: Without dead ends: 710 [2020-10-14 23:27:38,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:27:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-14 23:27:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 642. [2020-10-14 23:27:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-14 23:27:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 840 transitions. [2020-10-14 23:27:38,076 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 840 transitions. Word has length 48 [2020-10-14 23:27:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:38,076 INFO L479 AbstractCegarLoop]: Abstraction has 642 states and 840 transitions. [2020-10-14 23:27:38,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 840 transitions. [2020-10-14 23:27:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:38,078 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:38,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 23:27:38,078 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2052865314, now seen corresponding path program 7 times [2020-10-14 23:27:38,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:38,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085435183] [2020-10-14 23:27:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:38,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:38,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:38,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:38,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:38,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:39,215 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-14 23:27:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:39,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:39,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:39,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:39,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:39,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:39,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:39,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:27:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:39,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085435183] [2020-10-14 23:27:39,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:39,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:39,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588519957] [2020-10-14 23:27:39,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:39,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:39,734 INFO L87 Difference]: Start difference. First operand 642 states and 840 transitions. Second operand 16 states. [2020-10-14 23:27:40,545 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-14 23:27:40,974 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 23:27:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:41,589 INFO L93 Difference]: Finished difference Result 702 states and 909 transitions. [2020-10-14 23:27:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:27:41,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:41,592 INFO L225 Difference]: With dead ends: 702 [2020-10-14 23:27:41,592 INFO L226 Difference]: Without dead ends: 700 [2020-10-14 23:27:41,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-10-14 23:27:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 636. [2020-10-14 23:27:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-10-14 23:27:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 832 transitions. [2020-10-14 23:27:41,643 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 832 transitions. Word has length 48 [2020-10-14 23:27:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:41,643 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 832 transitions. [2020-10-14 23:27:41,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 832 transitions. [2020-10-14 23:27:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:41,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:41,644 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:41,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-14 23:27:41,644 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2041194846, now seen corresponding path program 8 times [2020-10-14 23:27:41,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:41,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906680404] [2020-10-14 23:27:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:42,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:42,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:42,706 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-14 23:27:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:43,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:43,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:43,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:43,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:43,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:43,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:43,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906680404] [2020-10-14 23:27:43,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:43,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:43,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496320607] [2020-10-14 23:27:43,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:43,237 INFO L87 Difference]: Start difference. First operand 636 states and 832 transitions. Second operand 16 states. [2020-10-14 23:27:44,175 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-14 23:27:44,574 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 23:27:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:45,224 INFO L93 Difference]: Finished difference Result 694 states and 898 transitions. [2020-10-14 23:27:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:27:45,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:45,228 INFO L225 Difference]: With dead ends: 694 [2020-10-14 23:27:45,228 INFO L226 Difference]: Without dead ends: 692 [2020-10-14 23:27:45,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-14 23:27:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 633. [2020-10-14 23:27:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-14 23:27:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 828 transitions. [2020-10-14 23:27:45,289 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 828 transitions. Word has length 48 [2020-10-14 23:27:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:45,290 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 828 transitions. [2020-10-14 23:27:45,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 828 transitions. [2020-10-14 23:27:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:27:45,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:45,291 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:45,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-14 23:27:45,291 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:45,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1983936544, now seen corresponding path program 9 times [2020-10-14 23:27:45,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:45,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029202132] [2020-10-14 23:27:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:46,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:46,536 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-14 23:27:47,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:47,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:47,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:47,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:47,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029202132] [2020-10-14 23:27:47,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:47,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:27:47,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446496811] [2020-10-14 23:27:47,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:27:47,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:27:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:27:47,104 INFO L87 Difference]: Start difference. First operand 633 states and 828 transitions. Second operand 16 states. [2020-10-14 23:27:47,893 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-14 23:27:48,296 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 23:27:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:48,941 INFO L93 Difference]: Finished difference Result 696 states and 899 transitions. [2020-10-14 23:27:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:27:48,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-14 23:27:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:48,944 INFO L225 Difference]: With dead ends: 696 [2020-10-14 23:27:48,944 INFO L226 Difference]: Without dead ends: 694 [2020-10-14 23:27:48,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-10-14 23:27:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 620. [2020-10-14 23:27:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-14 23:27:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 811 transitions. [2020-10-14 23:27:48,994 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 811 transitions. Word has length 48 [2020-10-14 23:27:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:48,995 INFO L479 AbstractCegarLoop]: Abstraction has 620 states and 811 transitions. [2020-10-14 23:27:48,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:27:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 811 transitions. [2020-10-14 23:27:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:27:48,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:48,996 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:48,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-14 23:27:48,996 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1434780983, now seen corresponding path program 15 times [2020-10-14 23:27:48,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:48,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701930109] [2020-10-14 23:27:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:49,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:50,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:50,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:51,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:51,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:51,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:52,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:54,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:54,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:27:54,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 23:27:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:27:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:54,943 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 7 [2020-10-14 23:27:55,640 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 7 [2020-10-14 23:27:56,171 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 7 [2020-10-14 23:27:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:56,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:56,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:56,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:56,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:56,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:27:56,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:56,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:56,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:56,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:56,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:56,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:27:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:27:56,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701930109] [2020-10-14 23:27:56,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:56,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:27:56,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620263947] [2020-10-14 23:27:56,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:27:56,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:56,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:27:56,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:27:56,272 INFO L87 Difference]: Start difference. First operand 620 states and 811 transitions. Second operand 12 states. [2020-10-14 23:27:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:56,878 INFO L93 Difference]: Finished difference Result 922 states and 1219 transitions. [2020-10-14 23:27:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:27:56,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-14 23:27:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:56,881 INFO L225 Difference]: With dead ends: 922 [2020-10-14 23:27:56,881 INFO L226 Difference]: Without dead ends: 796 [2020-10-14 23:27:56,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-10-14 23:27:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 737. [2020-10-14 23:27:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-14 23:27:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 972 transitions. [2020-10-14 23:27:56,942 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 972 transitions. Word has length 50 [2020-10-14 23:27:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:56,942 INFO L479 AbstractCegarLoop]: Abstraction has 737 states and 972 transitions. [2020-10-14 23:27:56,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:27:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 972 transitions. [2020-10-14 23:27:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:27:56,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:56,943 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:56,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-14 23:27:56,944 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1803485433, now seen corresponding path program 11 times [2020-10-14 23:27:56,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:56,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783699276] [2020-10-14 23:27:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:56,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:57,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:57,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:27:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:27:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:58,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:27:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:27:58,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:27:58,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:27:58,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:27:58,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:27:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:27:58,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:27:58,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:27:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:27:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:27:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:27:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:27:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:27:58,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783699276] [2020-10-14 23:27:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:27:58,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:27:58,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424579786] [2020-10-14 23:27:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:27:58,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:27:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:27:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:27:58,233 INFO L87 Difference]: Start difference. First operand 737 states and 972 transitions. Second operand 15 states. [2020-10-14 23:27:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:27:59,915 INFO L93 Difference]: Finished difference Result 877 states and 1156 transitions. [2020-10-14 23:27:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:27:59,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 23:27:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:27:59,918 INFO L225 Difference]: With dead ends: 877 [2020-10-14 23:27:59,918 INFO L226 Difference]: Without dead ends: 821 [2020-10-14 23:27:59,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:27:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2020-10-14 23:27:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 779. [2020-10-14 23:27:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-14 23:27:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1025 transitions. [2020-10-14 23:27:59,975 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1025 transitions. Word has length 50 [2020-10-14 23:27:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:27:59,976 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 1025 transitions. [2020-10-14 23:27:59,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:27:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1025 transitions. [2020-10-14 23:27:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:27:59,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:27:59,977 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:27:59,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-14 23:27:59,977 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:27:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:27:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash -855131938, now seen corresponding path program 12 times [2020-10-14 23:27:59,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:27:59,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87770065] [2020-10-14 23:27:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:27:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:00,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1557 [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:01,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:28:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:01,928 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-14 23:28:02,080 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-14 23:28:02,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:02,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:02,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:02,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:02,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87770065] [2020-10-14 23:28:02,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:02,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:28:02,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788772033] [2020-10-14 23:28:02,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:28:02,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:28:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:28:02,581 INFO L87 Difference]: Start difference. First operand 779 states and 1025 transitions. Second operand 15 states. [2020-10-14 23:28:03,233 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-14 23:28:03,628 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-14 23:28:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:05,145 INFO L93 Difference]: Finished difference Result 1090 states and 1419 transitions. [2020-10-14 23:28:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:28:05,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 23:28:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:05,147 INFO L225 Difference]: With dead ends: 1090 [2020-10-14 23:28:05,147 INFO L226 Difference]: Without dead ends: 1088 [2020-10-14 23:28:05,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:28:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2020-10-14 23:28:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 856. [2020-10-14 23:28:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2020-10-14 23:28:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1132 transitions. [2020-10-14 23:28:05,219 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1132 transitions. Word has length 50 [2020-10-14 23:28:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:05,219 INFO L479 AbstractCegarLoop]: Abstraction has 856 states and 1132 transitions. [2020-10-14 23:28:05,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:28:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1132 transitions. [2020-10-14 23:28:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:28:05,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:05,220 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:05,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-14 23:28:05,220 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash -855130016, now seen corresponding path program 16 times [2020-10-14 23:28:05,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:05,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706781181] [2020-10-14 23:28:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:06,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:07,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:07,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:28:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:07,469 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-14 23:28:07,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:07,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:07,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:07,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:07,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:07,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:07,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:07,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:07,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:07,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706781181] [2020-10-14 23:28:07,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:07,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:28:07,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601552396] [2020-10-14 23:28:07,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:28:07,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:28:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:28:07,995 INFO L87 Difference]: Start difference. First operand 856 states and 1132 transitions. Second operand 15 states. [2020-10-14 23:28:08,506 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-10-14 23:28:08,853 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-14 23:28:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:10,127 INFO L93 Difference]: Finished difference Result 1627 states and 2186 transitions. [2020-10-14 23:28:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:28:10,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 23:28:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:10,130 INFO L225 Difference]: With dead ends: 1627 [2020-10-14 23:28:10,130 INFO L226 Difference]: Without dead ends: 1508 [2020-10-14 23:28:10,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:28:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2020-10-14 23:28:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1246. [2020-10-14 23:28:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1246 states. [2020-10-14 23:28:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1677 transitions. [2020-10-14 23:28:10,227 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1677 transitions. Word has length 50 [2020-10-14 23:28:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:10,228 INFO L479 AbstractCegarLoop]: Abstraction has 1246 states and 1677 transitions. [2020-10-14 23:28:10,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:28:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1677 transitions. [2020-10-14 23:28:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:28:10,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:10,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:10,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-14 23:28:10,229 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash -797873636, now seen corresponding path program 12 times [2020-10-14 23:28:10,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:10,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986089503] [2020-10-14 23:28:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:10,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:11,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:11,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:28:11,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:11,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:28:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:12,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:12,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:12,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:12,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:12,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986089503] [2020-10-14 23:28:12,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:12,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:28:12,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560387551] [2020-10-14 23:28:12,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:28:12,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:28:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:28:12,721 INFO L87 Difference]: Start difference. First operand 1246 states and 1677 transitions. Second operand 15 states. [2020-10-14 23:28:13,307 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-14 23:28:13,724 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-14 23:28:15,155 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-14 23:28:15,371 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-14 23:28:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:15,498 INFO L93 Difference]: Finished difference Result 1579 states and 2095 transitions. [2020-10-14 23:28:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:28:15,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 23:28:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:15,508 INFO L225 Difference]: With dead ends: 1579 [2020-10-14 23:28:15,508 INFO L226 Difference]: Without dead ends: 1577 [2020-10-14 23:28:15,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:28:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-10-14 23:28:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1192. [2020-10-14 23:28:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-14 23:28:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1606 transitions. [2020-10-14 23:28:15,694 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1606 transitions. Word has length 50 [2020-10-14 23:28:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:15,695 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 1606 transitions. [2020-10-14 23:28:15,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:28:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1606 transitions. [2020-10-14 23:28:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:15,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:15,697 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:15,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-14 23:28:15,698 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash -702082559, now seen corresponding path program 13 times [2020-10-14 23:28:15,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:15,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22989524] [2020-10-14 23:28:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:15,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:15,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:17,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:17,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:17,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:17,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1683 [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:28:17,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:17,711 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-14 23:28:17,997 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-14 23:28:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:18,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:18,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:18,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:18,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:18,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:18,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:18,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:18,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22989524] [2020-10-14 23:28:18,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:18,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:28:18,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430068194] [2020-10-14 23:28:18,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:28:18,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:28:18,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:28:18,436 INFO L87 Difference]: Start difference. First operand 1192 states and 1606 transitions. Second operand 16 states. [2020-10-14 23:28:19,365 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 23:28:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:20,626 INFO L93 Difference]: Finished difference Result 1355 states and 1810 transitions. [2020-10-14 23:28:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:28:20,628 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 23:28:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:20,633 INFO L225 Difference]: With dead ends: 1355 [2020-10-14 23:28:20,633 INFO L226 Difference]: Without dead ends: 1353 [2020-10-14 23:28:20,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:28:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-10-14 23:28:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1274. [2020-10-14 23:28:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2020-10-14 23:28:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1716 transitions. [2020-10-14 23:28:20,839 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1716 transitions. Word has length 52 [2020-10-14 23:28:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:20,839 INFO L479 AbstractCegarLoop]: Abstraction has 1274 states and 1716 transitions. [2020-10-14 23:28:20,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:28:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1716 transitions. [2020-10-14 23:28:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:20,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:20,845 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:20,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-14 23:28:20,849 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash -702080637, now seen corresponding path program 17 times [2020-10-14 23:28:20,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:20,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345996381] [2020-10-14 23:28:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:20,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:22,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:22,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2005 [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:22,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:22,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:22,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:28:22,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:28:23,172 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-14 23:28:23,419 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-14 23:28:23,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:23,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:23,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:23,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:23,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:23,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345996381] [2020-10-14 23:28:23,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:23,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:28:23,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247572977] [2020-10-14 23:28:23,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:28:23,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:28:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:28:23,813 INFO L87 Difference]: Start difference. First operand 1274 states and 1716 transitions. Second operand 16 states. [2020-10-14 23:28:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:25,683 INFO L93 Difference]: Finished difference Result 1490 states and 1998 transitions. [2020-10-14 23:28:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:28:25,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 23:28:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:25,688 INFO L225 Difference]: With dead ends: 1490 [2020-10-14 23:28:25,688 INFO L226 Difference]: Without dead ends: 1446 [2020-10-14 23:28:25,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:28:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2020-10-14 23:28:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1343. [2020-10-14 23:28:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2020-10-14 23:28:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1812 transitions. [2020-10-14 23:28:25,884 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1812 transitions. Word has length 52 [2020-10-14 23:28:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:25,885 INFO L479 AbstractCegarLoop]: Abstraction has 1343 states and 1812 transitions. [2020-10-14 23:28:25,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:28:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1812 transitions. [2020-10-14 23:28:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:25,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:25,887 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:25,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-14 23:28:25,887 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash -644824257, now seen corresponding path program 13 times [2020-10-14 23:28:25,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:25,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222614282] [2020-10-14 23:28:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:25,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:26,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:27,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:27,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:28:27,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:27,856 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-14 23:28:27,978 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-14 23:28:28,146 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-14 23:28:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:28,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:28,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:28,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:28,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:28,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222614282] [2020-10-14 23:28:28,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:28,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:28:28,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196273557] [2020-10-14 23:28:28,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:28:28,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:28:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:28:28,584 INFO L87 Difference]: Start difference. First operand 1343 states and 1812 transitions. Second operand 16 states. [2020-10-14 23:28:29,417 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 23:28:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:30,534 INFO L93 Difference]: Finished difference Result 1431 states and 1914 transitions. [2020-10-14 23:28:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:28:30,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 23:28:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:30,540 INFO L225 Difference]: With dead ends: 1431 [2020-10-14 23:28:30,540 INFO L226 Difference]: Without dead ends: 1429 [2020-10-14 23:28:30,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:28:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2020-10-14 23:28:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1343. [2020-10-14 23:28:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2020-10-14 23:28:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1812 transitions. [2020-10-14 23:28:30,750 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1812 transitions. Word has length 52 [2020-10-14 23:28:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:30,751 INFO L479 AbstractCegarLoop]: Abstraction has 1343 states and 1812 transitions. [2020-10-14 23:28:30,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:28:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1812 transitions. [2020-10-14 23:28:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:30,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:30,753 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:30,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-14 23:28:30,754 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash -443917121, now seen corresponding path program 14 times [2020-10-14 23:28:30,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:30,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307192161] [2020-10-14 23:28:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:30,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:32,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:32,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1804 [2020-10-14 23:28:32,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:32,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:28:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:32,889 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-14 23:28:33,017 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-14 23:28:33,198 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-14 23:28:33,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:33,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:33,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:33,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:33,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307192161] [2020-10-14 23:28:33,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:33,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:28:33,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860515899] [2020-10-14 23:28:33,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:28:33,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:33,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:28:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:28:33,671 INFO L87 Difference]: Start difference. First operand 1343 states and 1812 transitions. Second operand 16 states. [2020-10-14 23:28:34,582 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 23:28:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:35,741 INFO L93 Difference]: Finished difference Result 1445 states and 1932 transitions. [2020-10-14 23:28:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:28:35,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 23:28:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:35,746 INFO L225 Difference]: With dead ends: 1445 [2020-10-14 23:28:35,746 INFO L226 Difference]: Without dead ends: 1443 [2020-10-14 23:28:35,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:28:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-10-14 23:28:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1349. [2020-10-14 23:28:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-10-14 23:28:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1821 transitions. [2020-10-14 23:28:35,972 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1821 transitions. Word has length 52 [2020-10-14 23:28:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:35,972 INFO L479 AbstractCegarLoop]: Abstraction has 1349 states and 1821 transitions. [2020-10-14 23:28:35,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:28:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1821 transitions. [2020-10-14 23:28:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:35,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:35,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:35,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-14 23:28:35,975 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -386658819, now seen corresponding path program 15 times [2020-10-14 23:28:35,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:35,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912488618] [2020-10-14 23:28:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:36,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:38,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2003 [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:28:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:39,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:39,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:39,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912488618] [2020-10-14 23:28:39,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:39,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:28:39,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350510058] [2020-10-14 23:28:39,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:28:39,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:39,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:28:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:28:39,034 INFO L87 Difference]: Start difference. First operand 1349 states and 1821 transitions. Second operand 16 states. [2020-10-14 23:28:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:40,965 INFO L93 Difference]: Finished difference Result 1691 states and 2274 transitions. [2020-10-14 23:28:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:28:40,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 23:28:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:40,969 INFO L225 Difference]: With dead ends: 1691 [2020-10-14 23:28:40,969 INFO L226 Difference]: Without dead ends: 1689 [2020-10-14 23:28:40,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:28:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-10-14 23:28:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1524. [2020-10-14 23:28:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2020-10-14 23:28:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2080 transitions. [2020-10-14 23:28:41,099 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2080 transitions. Word has length 52 [2020-10-14 23:28:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:41,099 INFO L479 AbstractCegarLoop]: Abstraction has 1524 states and 2080 transitions. [2020-10-14 23:28:41,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:28:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2080 transitions. [2020-10-14 23:28:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:41,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:41,101 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:41,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-14 23:28:41,101 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1060768061, now seen corresponding path program 18 times [2020-10-14 23:28:41,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:41,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367709231] [2020-10-14 23:28:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:41,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:42,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:42,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:28:42,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:28:42,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-14 23:28:42,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:42,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:28:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:28:42,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:43,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:43,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:43,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:28:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:28:43,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367709231] [2020-10-14 23:28:43,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:28:43,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:28:43,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926913454] [2020-10-14 23:28:43,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:28:43,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:28:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:28:43,151 INFO L87 Difference]: Start difference. First operand 1524 states and 2080 transitions. Second operand 15 states. [2020-10-14 23:28:43,599 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-14 23:28:43,940 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-14 23:28:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:44,695 INFO L93 Difference]: Finished difference Result 1872 states and 2545 transitions. [2020-10-14 23:28:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:28:44,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-14 23:28:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:44,699 INFO L225 Difference]: With dead ends: 1872 [2020-10-14 23:28:44,699 INFO L226 Difference]: Without dead ends: 1797 [2020-10-14 23:28:44,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:28:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2020-10-14 23:28:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1635. [2020-10-14 23:28:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1635 states. [2020-10-14 23:28:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2225 transitions. [2020-10-14 23:28:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2225 transitions. Word has length 52 [2020-10-14 23:28:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:44,837 INFO L479 AbstractCegarLoop]: Abstraction has 1635 states and 2225 transitions. [2020-10-14 23:28:44,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:28:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2225 transitions. [2020-10-14 23:28:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:28:44,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:44,839 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:44,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-14 23:28:44,839 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:44,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1310964865, now seen corresponding path program 14 times [2020-10-14 23:28:44,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:44,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654792103] [2020-10-14 23:28:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:44,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking...