/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sina4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:55:35,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:55:35,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:55:35,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:55:35,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:55:35,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:55:35,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:55:35,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:55:35,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:55:35,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:55:35,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:55:35,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:55:35,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:55:35,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:55:35,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:55:35,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:55:35,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:55:35,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:55:35,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:55:35,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:55:35,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:55:35,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:55:35,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:55:35,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:55:35,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:55:35,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:55:35,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:55:35,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:55:35,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:55:35,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:55:35,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:55:35,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:55:35,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:55:35,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:55:35,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:55:35,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:55:35,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:55:35,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:55:35,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:55:35,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:55:35,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:55:35,440 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:55:35,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:55:35,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:55:35,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:55:35,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:55:35,489 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:55:35,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:55:35,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:55:35,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:55:35,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:55:35,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:55:35,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:55:35,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:55:35,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:55:35,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:55:35,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:55:35,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:55:35,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:55:35,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:55:35,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:55:35,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:55:35,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:55:35,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:55:35,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:55:35,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:55:35,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:55:35,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:55:35,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:55:35,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:55:35,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:55:35,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:55:35,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:55:35,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:55:35,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:55:35,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:55:35,840 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:55:35,841 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina4.c [2020-10-13 23:55:35,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962013e92/e4eebf7f87014da6bc6de327fab82d56/FLAG4c7a4c115 [2020-10-13 23:55:36,356 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:55:36,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina4.c [2020-10-13 23:55:36,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962013e92/e4eebf7f87014da6bc6de327fab82d56/FLAG4c7a4c115 [2020-10-13 23:55:36,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962013e92/e4eebf7f87014da6bc6de327fab82d56 [2020-10-13 23:55:36,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:55:36,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:55:36,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:55:36,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:55:36,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:55:36,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:55:36" (1/1) ... [2020-10-13 23:55:36,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc4c8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:36, skipping insertion in model container [2020-10-13 23:55:36,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:55:36" (1/1) ... [2020-10-13 23:55:36,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:55:36,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:55:36,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:55:36,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:55:36,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:55:37,093 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:55:37,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37 WrapperNode [2020-10-13 23:55:37,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:55:37,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:55:37,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:55:37,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:55:37,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... [2020-10-13 23:55:37,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:55:37,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:55:37,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:55:37,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:55:37,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:55:37,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:55:37,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:55:37,204 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:55:37,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:55:37,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:55:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:55:37,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:55:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:55:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:55:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:55:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:55:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:55:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:55:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:55:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:55:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:55:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:55:37,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:55:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:55:37,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:55:37,488 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:55:37,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:55:37 BoogieIcfgContainer [2020-10-13 23:55:37,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:55:37,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:55:37,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:55:37,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:55:37,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:55:36" (1/3) ... [2020-10-13 23:55:37,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d1dd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:55:37, skipping insertion in model container [2020-10-13 23:55:37,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:55:37" (2/3) ... [2020-10-13 23:55:37,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d1dd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:55:37, skipping insertion in model container [2020-10-13 23:55:37,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:55:37" (3/3) ... [2020-10-13 23:55:37,503 INFO L109 eAbstractionObserver]: Analyzing ICFG sina4.c [2020-10-13 23:55:37,516 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:55:37,529 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:55:37,562 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:55:37,590 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:55:37,591 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:55:37,591 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:55:37,591 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:55:37,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:55:37,591 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:55:37,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:55:37,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:55:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-13 23:55:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:55:37,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:37,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:37,627 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -173101897, now seen corresponding path program 1 times [2020-10-13 23:55:37,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:37,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336866321] [2020-10-13 23:55:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:55:39,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:55:39,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1275 [2020-10-13 23:55:39,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:55:39,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:55:39,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:39,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:39,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:55:39,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:39,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:55:39,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:39,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:39,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:39,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:55:39,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:39,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:55:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:39,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336866321] [2020-10-13 23:55:39,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:55:39,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:55:39,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064992056] [2020-10-13 23:55:39,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:55:39,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:55:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:55:39,192 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-13 23:55:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:39,347 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2020-10-13 23:55:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:55:39,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-13 23:55:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:39,361 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:55:39,361 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 23:55:39,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:55:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 23:55:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 23:55:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:55:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 23:55:39,421 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-13 23:55:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:39,422 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 23:55:39,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:55:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 23:55:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:55:39,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:39,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:39,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:55:39,430 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1503462707, now seen corresponding path program 1 times [2020-10-13 23:55:39,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:39,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009066965] [2020-10-13 23:55:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:40,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:55:40,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:55:40,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1180 [2020-10-13 23:55:40,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:40,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:40,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:55:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:55:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:55:40,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:40,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:40,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:40,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:40,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:55:40,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:40,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:40,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:40,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:40,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:40,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:40,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:40,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:55:40,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:40,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:55:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:55:40,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:40,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009066965] [2020-10-13 23:55:40,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:55:40,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:55:40,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230628765] [2020-10-13 23:55:40,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:55:40,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:55:40,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:55:40,731 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 5 states. [2020-10-13 23:55:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:40,930 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-13 23:55:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:55:40,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-13 23:55:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:40,932 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:55:40,932 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:55:40,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:55:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:55:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 23:55:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:55:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-13 23:55:40,943 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-10-13 23:55:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:40,943 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-13 23:55:40,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:55:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-13 23:55:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:55:40,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:40,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:40,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:55:40,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -260192085, now seen corresponding path program 1 times [2020-10-13 23:55:40,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:40,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864112584] [2020-10-13 23:55:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:40,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:41,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:45,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:55:45,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:55:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:55:45,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:45,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:55:45,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:45,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:55:45,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:47,064 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-10-13 23:55:47,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:47,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:47,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:47,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:47,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:47,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:47,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:47,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:47,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:47,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:47,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:47,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:47,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:47,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:47,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:47,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:55:47,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864112584] [2020-10-13 23:55:47,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:55:47,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386094990] [2020-10-13 23:55:47,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:55:47,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:55:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:55:47,458 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 18 states. [2020-10-13 23:55:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:48,331 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-13 23:55:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:55:48,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-13 23:55:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:48,336 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:55:48,336 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:55:48,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:55:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:55:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-10-13 23:55:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:55:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-13 23:55:48,353 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 34 [2020-10-13 23:55:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:48,354 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-13 23:55:48,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:55:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-13 23:55:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:55:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:48,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:48,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:55:48,356 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash -997101975, now seen corresponding path program 2 times [2020-10-13 23:55:48,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:48,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276789515] [2020-10-13 23:55:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:53,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:55:53,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:55:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:55:53,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:53,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:55:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:55:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:53,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:53,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:53,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:55:53,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:53,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:53,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:53,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:53,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:53,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:53,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:53,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:53,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:53,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:53,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:55:53,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276789515] [2020-10-13 23:55:53,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:53,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:55:53,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455121058] [2020-10-13 23:55:53,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:55:53,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:55:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:55:53,479 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 8 states. [2020-10-13 23:55:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:53,759 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-13 23:55:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:55:53,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-13 23:55:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:53,761 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:55:53,761 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:55:53,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:55:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:55:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-10-13 23:55:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:55:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-13 23:55:53,781 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 36 [2020-10-13 23:55:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:53,781 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-13 23:55:53,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:55:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-13 23:55:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:55:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:53,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:53,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:55:53,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1134932505, now seen corresponding path program 3 times [2020-10-13 23:55:53,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:53,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744081657] [2020-10-13 23:55:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:58,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:58,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:55:58,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:55:58,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4820 [2020-10-13 23:55:58,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:58,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:55:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:55:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:58,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:58,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:58,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:58,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:58,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:58,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:58,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:58,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:58,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:58,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:58,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:58,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:58,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:58,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:58,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:58,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:55:58,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744081657] [2020-10-13 23:55:58,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:58,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:55:58,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939518921] [2020-10-13 23:55:58,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:55:58,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:55:58,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:55:58,698 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-10-13 23:55:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:58,941 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-13 23:55:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:55:58,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 23:55:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:58,943 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:55:58,943 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:55:58,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:55:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:55:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-10-13 23:55:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:55:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 23:55:58,958 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-13 23:55:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:58,958 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 23:55:58,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:55:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 23:55:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:55:58,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:58,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:55:58,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:55:58,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1395592157, now seen corresponding path program 4 times [2020-10-13 23:55:58,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:58,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014791589] [2020-10-13 23:55:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:59,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:00,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:00,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:03,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:56:03,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:56:03,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:56:03,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:03,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:56:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:03,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 23:56:03,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:05,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:05,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:05,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:05,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:05,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:05,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:05,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:05,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:05,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:05,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:05,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:05,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:05,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:05,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:05,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:05,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:05,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:05,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:05,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:05,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014791589] [2020-10-13 23:56:05,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:05,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:56:05,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223295480] [2020-10-13 23:56:05,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:56:05,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:05,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:56:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:56:05,440 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 25 states. [2020-10-13 23:56:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:07,453 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-13 23:56:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:56:07,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 42 [2020-10-13 23:56:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:07,456 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:56:07,456 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:56:07,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:56:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:56:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-10-13 23:56:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:56:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-13 23:56:07,478 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 42 [2020-10-13 23:56:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:07,478 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-13 23:56:07,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:56:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-13 23:56:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:56:07,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:07,479 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:07,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:56:07,480 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:07,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1343853535, now seen corresponding path program 5 times [2020-10-13 23:56:07,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:07,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668686892] [2020-10-13 23:56:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:56:12,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:56:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:56:12,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:56:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:56:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:12,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:12,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:12,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:12,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:12,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:12,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:12,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:12,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:12,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:12,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:56:12,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668686892] [2020-10-13 23:56:12,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:12,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:56:12,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662205685] [2020-10-13 23:56:12,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:56:12,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:56:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:56:12,602 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 10 states. [2020-10-13 23:56:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:13,019 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-10-13 23:56:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:56:13,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 23:56:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:13,023 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:56:13,023 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:56:13,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:56:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:56:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-13 23:56:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:56:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-10-13 23:56:13,041 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 44 [2020-10-13 23:56:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:13,042 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-10-13 23:56:13,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:56:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-10-13 23:56:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:56:13,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:13,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:13,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:56:13,046 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash -228557663, now seen corresponding path program 6 times [2020-10-13 23:56:13,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:13,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127047742] [2020-10-13 23:56:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:56:18,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:56:18,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-13 23:56:18,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:56:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:18,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:56:18,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:18,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:18,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:18,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:18,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:18,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:18,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:18,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:18,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:18,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:18,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:18,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:56:18,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127047742] [2020-10-13 23:56:18,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:18,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:56:18,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911333439] [2020-10-13 23:56:18,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:56:18,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:18,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:56:18,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:56:18,232 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 10 states. [2020-10-13 23:56:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:18,664 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2020-10-13 23:56:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:56:18,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-13 23:56:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:18,667 INFO L225 Difference]: With dead ends: 124 [2020-10-13 23:56:18,667 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:56:18,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:56:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:56:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-13 23:56:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:56:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-10-13 23:56:18,681 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 44 [2020-10-13 23:56:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:18,681 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-10-13 23:56:18,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:56:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-10-13 23:56:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:56:18,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:18,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:18,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:56:18,683 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:18,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1976046599, now seen corresponding path program 1 times [2020-10-13 23:56:18,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:18,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054471062] [2020-10-13 23:56:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:23,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:56:23,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 23:56:23,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:56:23,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:23,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:23,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:56:23,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:23,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:56:23,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:25,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:25,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:25,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:25,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:25,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:25,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:25,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:25,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:25,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:25,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:25,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 23:56:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:25,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:25,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:25,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:25,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:25,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054471062] [2020-10-13 23:56:25,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:25,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:56:25,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330044721] [2020-10-13 23:56:25,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:56:25,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:56:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:56:25,066 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 25 states. [2020-10-13 23:56:25,737 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 23:56:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:27,179 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-13 23:56:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:56:27,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-13 23:56:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:27,181 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:56:27,181 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:56:27,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:56:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:56:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-10-13 23:56:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:56:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-13 23:56:27,191 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 50 [2020-10-13 23:56:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:27,192 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-13 23:56:27,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:56:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-13 23:56:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:56:27,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:27,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:27,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:56:27,193 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2097248357, now seen corresponding path program 7 times [2020-10-13 23:56:27,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:27,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870372103] [2020-10-13 23:56:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:28,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:30,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:32,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:32,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:56:32,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:56:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:32,845 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-13 23:56:34,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:34,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:34,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:34,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:34,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:34,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:34,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:34,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:34,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:34,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:34,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:34,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:34,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:34,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:34,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:56:34,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870372103] [2020-10-13 23:56:34,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:34,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:56:34,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827295108] [2020-10-13 23:56:34,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:56:34,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:56:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:56:34,385 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 29 states. [2020-10-13 23:56:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:36,702 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-13 23:56:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:56:36,702 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 50 [2020-10-13 23:56:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:36,703 INFO L225 Difference]: With dead ends: 89 [2020-10-13 23:56:36,704 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:56:36,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:56:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:56:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2020-10-13 23:56:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:56:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-13 23:56:36,718 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 50 [2020-10-13 23:56:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:36,719 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-13 23:56:36,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:56:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-13 23:56:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:56:36,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:36,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:36,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:56:36,723 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:36,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1735298599, now seen corresponding path program 8 times [2020-10-13 23:56:36,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:36,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929592533] [2020-10-13 23:56:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:56:41,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:41,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:56:41,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:41,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:41,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:41,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:41,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:41,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:41,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:41,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:41,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:41,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:56:41,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929592533] [2020-10-13 23:56:41,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:41,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:56:41,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134641334] [2020-10-13 23:56:41,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:56:41,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:56:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:56:41,844 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 12 states. [2020-10-13 23:56:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:42,596 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-13 23:56:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:56:42,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:56:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:42,598 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:56:42,598 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:56:42,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:56:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:56:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 99. [2020-10-13 23:56:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:56:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-10-13 23:56:42,614 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 52 [2020-10-13 23:56:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:42,614 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-10-13 23:56:42,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:56:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-10-13 23:56:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:56:42,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:42,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:42,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:56:42,616 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1202630421, now seen corresponding path program 9 times [2020-10-13 23:56:42,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:42,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462416740] [2020-10-13 23:56:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:42,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:56:47,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:56:47,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:47,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:47,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:47,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:47,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 23:56:47,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462416740] [2020-10-13 23:56:47,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:47,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:56:47,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733745632] [2020-10-13 23:56:47,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:56:47,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:56:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:56:47,735 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 12 states. [2020-10-13 23:56:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:48,200 INFO L93 Difference]: Finished difference Result 183 states and 201 transitions. [2020-10-13 23:56:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:56:48,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-13 23:56:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:48,202 INFO L225 Difference]: With dead ends: 183 [2020-10-13 23:56:48,202 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:56:48,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:56:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:56:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-13 23:56:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:56:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-13 23:56:48,233 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 56 [2020-10-13 23:56:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:48,235 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-13 23:56:48,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:56:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-13 23:56:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:56:48,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:48,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:56:48,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:56:48,238 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1355380879, now seen corresponding path program 2 times [2020-10-13 23:56:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:48,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114857083] [2020-10-13 23:56:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:49,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:49,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:56:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:53,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 23:56:53,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:54,399 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-13 23:56:54,547 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 23:56:54,709 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-13 23:56:55,134 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-13 23:56:56,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:56,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:56,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:56,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:56,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:56,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:56,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:56,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:56,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:56:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:56,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:56,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:56,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:56:56,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:56:56,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114857083] [2020-10-13 23:56:56,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:56,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:56:56,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534581672] [2020-10-13 23:56:56,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:56:56,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:56:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:56:56,415 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 34 states. [2020-10-13 23:56:57,472 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 45 [2020-10-13 23:56:57,867 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 49 [2020-10-13 23:56:58,102 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 45 [2020-10-13 23:56:58,301 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 40 [2020-10-13 23:56:58,535 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2020-10-13 23:56:58,732 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-13 23:56:58,970 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-13 23:56:59,177 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 42 [2020-10-13 23:56:59,409 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-10-13 23:56:59,656 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2020-10-13 23:57:00,001 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2020-10-13 23:57:00,251 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-13 23:57:00,547 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-13 23:57:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:02,370 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-10-13 23:57:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:57:02,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 58 [2020-10-13 23:57:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:02,372 INFO L225 Difference]: With dead ends: 112 [2020-10-13 23:57:02,373 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:57:02,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 23:57:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:57:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-13 23:57:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:57:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-13 23:57:02,392 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 58 [2020-10-13 23:57:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:02,393 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-13 23:57:02,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:57:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-13 23:57:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:57:02,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:02,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:02,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:57:02,395 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash -244415725, now seen corresponding path program 10 times [2020-10-13 23:57:02,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:02,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700362905] [2020-10-13 23:57:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:03,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:04,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:05,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5155 [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:57:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:57:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:10,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:10,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:10,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:10,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:10,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:10,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:57:10,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700362905] [2020-10-13 23:57:10,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:10,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:57:10,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990908578] [2020-10-13 23:57:10,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:57:10,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:57:10,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:57:10,805 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 35 states. [2020-10-13 23:57:11,714 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2020-10-13 23:57:12,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 23:57:12,516 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-13 23:57:12,977 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 43 [2020-10-13 23:57:13,323 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-13 23:57:13,640 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 23:57:13,815 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-13 23:57:14,172 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 40 [2020-10-13 23:57:14,977 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-13 23:57:15,881 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 38 [2020-10-13 23:57:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:16,746 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-13 23:57:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:57:16,747 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 58 [2020-10-13 23:57:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:16,749 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:57:16,749 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 23:57:16,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=393, Invalid=4299, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 23:57:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 23:57:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 147. [2020-10-13 23:57:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 23:57:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2020-10-13 23:57:16,768 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 58 [2020-10-13 23:57:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:16,768 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2020-10-13 23:57:16,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:57:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2020-10-13 23:57:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:57:16,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:16,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:16,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:57:16,770 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash -490258607, now seen corresponding path program 11 times [2020-10-13 23:57:16,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:16,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272756171] [2020-10-13 23:57:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:16,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:16,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:21,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:57:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:57:21,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:57:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:21,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:21,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:21,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:21,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:21,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:21,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:21,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:57:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 23:57:21,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272756171] [2020-10-13 23:57:21,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:21,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:57:21,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777658935] [2020-10-13 23:57:21,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:57:21,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:57:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:57:21,948 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 14 states. [2020-10-13 23:57:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:23,088 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2020-10-13 23:57:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:57:23,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-13 23:57:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:23,093 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:57:23,093 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 23:57:23,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:57:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 23:57:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2020-10-13 23:57:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 23:57:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2020-10-13 23:57:23,115 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 60 [2020-10-13 23:57:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:23,115 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2020-10-13 23:57:23,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:57:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2020-10-13 23:57:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:57:23,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:23,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:23,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:57:23,116 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash -801877689, now seen corresponding path program 3 times [2020-10-13 23:57:23,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:23,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992206706] [2020-10-13 23:57:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:28,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:28,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:57:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:57:28,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:28,801 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-13 23:57:29,142 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 23:57:29,423 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-13 23:57:29,586 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-13 23:57:29,775 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-10-13 23:57:31,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:31,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:31,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:31,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:31,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:31,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:31,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:31,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:31,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:31,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:31,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:31,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:31,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:31,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:31,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:31,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:31,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:31,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 23:57:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:31,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:31,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:31,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:31,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:57:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:31,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:57:31,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992206706] [2020-10-13 23:57:31,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:31,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:57:31,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913454334] [2020-10-13 23:57:31,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:57:31,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:57:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:57:31,602 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand 33 states. [2020-10-13 23:57:32,649 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2020-10-13 23:57:32,970 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 41 [2020-10-13 23:57:33,248 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 49 [2020-10-13 23:57:33,493 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 58 [2020-10-13 23:57:33,888 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 23:57:34,122 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2020-10-13 23:57:36,308 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 23:57:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:36,498 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2020-10-13 23:57:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:57:36,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-10-13 23:57:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:36,500 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:57:36,500 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:57:36,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:57:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:57:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-13 23:57:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:57:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-10-13 23:57:36,512 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 66 [2020-10-13 23:57:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:36,512 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-10-13 23:57:36,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:57:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-10-13 23:57:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:57:36,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:36,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:36,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:57:36,513 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 40235149, now seen corresponding path program 12 times [2020-10-13 23:57:36,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:36,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445288183] [2020-10-13 23:57:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:36,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:36,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:41,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:57:41,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:57:41,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:41,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:41,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:41,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:41,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:41,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:41,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:41,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:41,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:41,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:41,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:57:41,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445288183] [2020-10-13 23:57:41,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:41,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:57:41,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138423513] [2020-10-13 23:57:41,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:57:41,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:57:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:57:41,752 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 14 states. [2020-10-13 23:57:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:42,531 INFO L93 Difference]: Finished difference Result 211 states and 231 transitions. [2020-10-13 23:57:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:57:42,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-13 23:57:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:42,534 INFO L225 Difference]: With dead ends: 211 [2020-10-13 23:57:42,534 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 23:57:42,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:57:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 23:57:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 124. [2020-10-13 23:57:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:57:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-10-13 23:57:42,571 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 64 [2020-10-13 23:57:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:42,571 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-10-13 23:57:42,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:57:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-10-13 23:57:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:57:42,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:42,572 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:42,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:57:42,573 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:42,573 INFO L82 PathProgramCache]: Analyzing trace with hash -678458647, now seen corresponding path program 4 times [2020-10-13 23:57:42,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:42,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861874987] [2020-10-13 23:57:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:46,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5121 [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:47,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:57:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:47,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 23:57:47,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:48,890 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 23:57:49,038 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-13 23:57:49,209 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-13 23:57:49,535 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 23:57:50,102 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 23:57:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:51,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:51,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:51,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:51,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:51,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:51,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:51,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:51,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:57:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:51,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:51,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:51,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:57:51,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:57:51,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861874987] [2020-10-13 23:57:51,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:51,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:57:51,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641951119] [2020-10-13 23:57:51,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:57:51,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:57:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:57:51,588 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 37 states. [2020-10-13 23:57:52,182 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-10-13 23:57:52,509 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2020-10-13 23:57:52,838 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-13 23:57:53,219 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2020-10-13 23:57:53,483 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-13 23:57:53,670 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-13 23:57:54,164 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-13 23:57:54,464 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2020-10-13 23:57:54,802 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-13 23:57:55,127 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-10-13 23:57:55,365 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 23:57:55,832 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-13 23:57:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:57,692 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-13 23:57:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:57:57,693 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 66 [2020-10-13 23:57:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:57,694 INFO L225 Difference]: With dead ends: 131 [2020-10-13 23:57:57,695 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:57:57,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=429, Invalid=3477, Unknown=0, NotChecked=0, Total=3906 [2020-10-13 23:57:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:57:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 23:57:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:57:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2020-10-13 23:57:57,713 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 66 [2020-10-13 23:57:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:57,713 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2020-10-13 23:57:57,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:57:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2020-10-13 23:57:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:57:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:57,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:57:57,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:57:57,714 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash 8971915, now seen corresponding path program 13 times [2020-10-13 23:57:57,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:57,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177324772] [2020-10-13 23:57:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:58,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:01,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:02,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:58:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:03,407 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-13 23:58:03,909 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-13 23:58:04,078 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 23:58:04,262 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-13 23:58:04,650 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-13 23:58:04,811 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-13 23:58:05,031 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-10-13 23:58:05,560 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-13 23:58:05,742 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-13 23:58:05,997 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-13 23:58:06,206 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 23:58:06,413 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-13 23:58:06,772 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-13 23:58:07,056 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 23:58:07,490 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2020-10-13 23:58:07,898 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 23:58:09,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:09,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:09,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:09,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:09,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:09,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:58:09,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177324772] [2020-10-13 23:58:09,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:09,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:58:09,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626139811] [2020-10-13 23:58:09,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:58:09,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:58:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:58:09,755 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand 43 states. [2020-10-13 23:58:11,425 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 70 [2020-10-13 23:58:11,686 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-13 23:58:12,211 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-13 23:58:12,876 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 81 [2020-10-13 23:58:13,692 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 60 [2020-10-13 23:58:14,134 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 64 [2020-10-13 23:58:14,589 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 56 [2020-10-13 23:58:15,080 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 60 [2020-10-13 23:58:15,396 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 69 [2020-10-13 23:58:15,781 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-13 23:58:16,154 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 69 [2020-10-13 23:58:16,446 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-13 23:58:16,724 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-10-13 23:58:17,181 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 68 [2020-10-13 23:58:17,811 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 44 [2020-10-13 23:58:18,531 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 102 [2020-10-13 23:58:19,090 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-13 23:58:19,587 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2020-10-13 23:58:19,947 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-13 23:58:20,330 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-13 23:58:20,619 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-13 23:58:20,972 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-13 23:58:21,191 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-13 23:58:21,417 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 23:58:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:22,793 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2020-10-13 23:58:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 23:58:22,799 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 66 [2020-10-13 23:58:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:22,800 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:58:22,800 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 23:58:22,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=618, Invalid=5702, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 23:58:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 23:58:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 173. [2020-10-13 23:58:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 23:58:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2020-10-13 23:58:22,825 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 66 [2020-10-13 23:58:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:22,825 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2020-10-13 23:58:22,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:58:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2020-10-13 23:58:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:58:22,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:22,826 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:22,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:58:22,826 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -258067319, now seen corresponding path program 14 times [2020-10-13 23:58:22,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:22,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663113641] [2020-10-13 23:58:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:22,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:27,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:58:27,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:27,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:58:27,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:27,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:58:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:27,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:58:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:28,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:28,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:28,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:28,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:28,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:28,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:28,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:28,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:28,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:28,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:28,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:28,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:28,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:28,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:28,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:28,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:58:28,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663113641] [2020-10-13 23:58:28,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:28,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:58:28,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065252313] [2020-10-13 23:58:28,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:58:28,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:58:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:58:28,054 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand 16 states. [2020-10-13 23:58:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:29,161 INFO L93 Difference]: Finished difference Result 307 states and 336 transitions. [2020-10-13 23:58:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:58:29,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-13 23:58:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:29,165 INFO L225 Difference]: With dead ends: 307 [2020-10-13 23:58:29,165 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 23:58:29,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:58:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 23:58:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 226. [2020-10-13 23:58:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 23:58:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 240 transitions. [2020-10-13 23:58:29,199 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 240 transitions. Word has length 68 [2020-10-13 23:58:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:29,199 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 240 transitions. [2020-10-13 23:58:29,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:58:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 240 transitions. [2020-10-13 23:58:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:58:29,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:29,200 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:29,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:58:29,201 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:29,201 INFO L82 PathProgramCache]: Analyzing trace with hash 29775113, now seen corresponding path program 15 times [2020-10-13 23:58:29,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:29,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861513085] [2020-10-13 23:58:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:29,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:58:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:34,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:58:34,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:34,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:34,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:34,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:34,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:34,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:58:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:34,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:34,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:34,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:58:34,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861513085] [2020-10-13 23:58:34,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:34,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:58:34,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268176335] [2020-10-13 23:58:34,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:58:34,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:58:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:58:34,405 INFO L87 Difference]: Start difference. First operand 226 states and 240 transitions. Second operand 16 states. [2020-10-13 23:58:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:35,969 INFO L93 Difference]: Finished difference Result 271 states and 291 transitions. [2020-10-13 23:58:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:58:35,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-13 23:58:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:35,973 INFO L225 Difference]: With dead ends: 271 [2020-10-13 23:58:35,973 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 23:58:35,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:58:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 23:58:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 199. [2020-10-13 23:58:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 23:58:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2020-10-13 23:58:36,000 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 68 [2020-10-13 23:58:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:36,000 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2020-10-13 23:58:36,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:58:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2020-10-13 23:58:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:58:36,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:36,001 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:36,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:58:36,002 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash -588358465, now seen corresponding path program 5 times [2020-10-13 23:58:36,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:36,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803830227] [2020-10-13 23:58:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:36,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:40,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:41,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5202 [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:58:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 23:58:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:42,091 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 23:58:42,239 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 23:58:42,512 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-13 23:58:42,707 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-13 23:58:43,023 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-13 23:58:43,368 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 23:58:44,548 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-13 23:58:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:46,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:46,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:46,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:46,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:46,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:46,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:46,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 23:58:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:46,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:46,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:46,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:46,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:46,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:58:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:46,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:58:46,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:58:46,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803830227] [2020-10-13 23:58:46,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:46,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:58:46,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755198056] [2020-10-13 23:58:46,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:58:46,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:46,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:58:46,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:58:46,088 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 40 states. [2020-10-13 23:58:47,029 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2020-10-13 23:58:47,299 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-13 23:58:47,896 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 68 [2020-10-13 23:58:48,543 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 64 [2020-10-13 23:58:49,025 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2020-10-13 23:58:49,488 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 63 [2020-10-13 23:58:49,844 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 47 [2020-10-13 23:58:50,118 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-10-13 23:58:50,382 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 46 [2020-10-13 23:58:50,611 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2020-10-13 23:58:51,126 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 54 [2020-10-13 23:58:51,615 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 42 [2020-10-13 23:58:52,108 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 37 [2020-10-13 23:58:52,321 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-13 23:58:52,680 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 23:58:52,999 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-13 23:58:53,489 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2020-10-13 23:58:53,775 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-13 23:58:54,081 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-13 23:58:54,645 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-13 23:58:54,952 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 37 [2020-10-13 23:58:55,355 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-13 23:58:55,623 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-10-13 23:58:56,235 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 37 [2020-10-13 23:58:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:56,636 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-10-13 23:58:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 23:58:56,636 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2020-10-13 23:58:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:56,637 INFO L225 Difference]: With dead ends: 205 [2020-10-13 23:58:56,638 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 23:58:56,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=615, Invalid=4935, Unknown=0, NotChecked=0, Total=5550 [2020-10-13 23:58:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 23:58:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-10-13 23:58:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 23:58:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 210 transitions. [2020-10-13 23:58:56,670 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 210 transitions. Word has length 74 [2020-10-13 23:58:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 210 transitions. [2020-10-13 23:58:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:58:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 210 transitions. [2020-10-13 23:58:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:58:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:56,672 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:56,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:58:56,672 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 598406753, now seen corresponding path program 6 times [2020-10-13 23:58:56,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:56,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245838865] [2020-10-13 23:58:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:57,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:00,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:01,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:01,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:59:01,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:59:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:02,208 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-13 23:59:02,436 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-13 23:59:02,586 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-10-13 23:59:02,760 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-13 23:59:02,934 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-13 23:59:03,101 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-13 23:59:03,719 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26 [2020-10-13 23:59:03,903 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2020-10-13 23:59:04,124 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-13 23:59:05,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:05,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:05,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:05,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:05,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:05,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:05,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:59:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:05,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-13 23:59:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:05,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:59:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:59:05,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-13 23:59:05,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245838865] [2020-10-13 23:59:05,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:05,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:59:05,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647153285] [2020-10-13 23:59:05,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:59:05,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:05,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:59:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:59:05,240 INFO L87 Difference]: Start difference. First operand 201 states and 210 transitions. Second operand 29 states. [2020-10-13 23:59:08,244 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-13 23:59:08,600 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-13 23:59:08,819 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-13 23:59:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:09,628 INFO L93 Difference]: Finished difference Result 223 states and 234 transitions. [2020-10-13 23:59:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:59:09,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2020-10-13 23:59:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:09,631 INFO L225 Difference]: With dead ends: 223 [2020-10-13 23:59:09,631 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 23:59:09,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=263, Invalid=2187, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:59:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 23:59:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2020-10-13 23:59:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-13 23:59:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 224 transitions. [2020-10-13 23:59:09,665 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 224 transitions. Word has length 74 [2020-10-13 23:59:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:09,665 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 224 transitions. [2020-10-13 23:59:09,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:59:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 224 transitions. [2020-10-13 23:59:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:59:09,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:09,667 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:09,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:59:09,667 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1119203843, now seen corresponding path program 16 times [2020-10-13 23:59:09,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:09,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836280017] [2020-10-13 23:59:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:14,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:15,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6023 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 23:59:15,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:16,170 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-13 23:59:16,413 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-13 23:59:16,546 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-13 23:59:16,731 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-13 23:59:16,902 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-13 23:59:17,133 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-13 23:59:17,363 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-13 23:59:17,605 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-10-13 23:59:17,865 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-10-13 23:59:18,171 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-13 23:59:18,455 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-13 23:59:18,770 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2020-10-13 23:59:19,075 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-13 23:59:19,576 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 65