/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:47:16,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:47:16,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:47:16,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:47:16,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:47:16,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:47:16,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:47:16,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:47:16,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:47:16,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:47:16,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:47:16,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:47:16,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:47:16,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:47:16,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:47:16,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:47:16,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:47:16,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:47:16,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:47:16,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:47:16,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:47:16,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:47:16,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:47:16,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:47:16,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:47:16,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:47:16,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:47:16,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:47:16,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:47:16,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:47:16,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:47:16,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:47:16,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:47:16,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:47:16,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:47:16,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:47:16,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:47:16,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:47:16,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:47:16,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:47:16,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:47:16,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:47:16,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:47:16,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:47:16,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:47:16,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:47:16,570 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:47:16,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:47:16,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:47:16,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:47:16,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:47:16,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:47:16,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:47:16,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:47:16,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:47:16,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:47:16,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:47:16,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:47:16,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:47:16,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:47:16,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:47:16,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:47:16,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:47:16,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:47:16,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:47:16,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:47:16,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:47:16,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:47:16,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:47:16,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:47:16,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:47:16,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:47:16,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:47:16,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:47:16,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:47:16,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:47:16,910 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:47:16,911 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-13 10:47:16,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa0ba7ac/7aec4c00e2964b358f56698ffd78c667/FLAGcbfd89722 [2020-10-13 10:47:17,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:47:17,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2020-10-13 10:47:17,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa0ba7ac/7aec4c00e2964b358f56698ffd78c667/FLAGcbfd89722 [2020-10-13 10:47:17,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa0ba7ac/7aec4c00e2964b358f56698ffd78c667 [2020-10-13 10:47:17,745 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:47:17,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:47:17,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:47:17,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:47:17,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:47:17,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:17,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e58bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17, skipping insertion in model container [2020-10-13 10:47:17,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:17,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:47:17,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:47:17,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:47:17,951 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:47:17,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:47:17,993 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:47:17,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17 WrapperNode [2020-10-13 10:47:17,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:47:17,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:47:17,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:47:17,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:47:18,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... [2020-10-13 10:47:18,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:47:18,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:47:18,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:47:18,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:47:18,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:47:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:47:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:47:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:47:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:47:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:47:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:47:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:47:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:47:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:47:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:47:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:47:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:47:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:47:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:47:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:47:18,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:47:18,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:47:18,446 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:47:18,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:47:18 BoogieIcfgContainer [2020-10-13 10:47:18,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:47:18,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:47:18,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:47:18,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:47:18,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:47:17" (1/3) ... [2020-10-13 10:47:18,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cbd5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:18, skipping insertion in model container [2020-10-13 10:47:18,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:47:17" (2/3) ... [2020-10-13 10:47:18,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cbd5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:18, skipping insertion in model container [2020-10-13 10:47:18,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:47:18" (3/3) ... [2020-10-13 10:47:18,458 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2020-10-13 10:47:18,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:47:18,473 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:47:18,487 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:47:18,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:47:18,508 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:47:18,508 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:47:18,508 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:47:18,508 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:47:18,509 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:47:18,509 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:47:18,509 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:47:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 10:47:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:47:18,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:18,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:18,532 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1585717717, now seen corresponding path program 1 times [2020-10-13 10:47:18,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:18,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062254646] [2020-10-13 10:47:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:18,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:19,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:19,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:47:19,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:47:19,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-13 10:47:19,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:47:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:47:19,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:47:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:19,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:19,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:19,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:19,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:47:19,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:19,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:19,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:19,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:47:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:19,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062254646] [2020-10-13 10:47:19,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:47:19,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:47:19,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768949955] [2020-10-13 10:47:19,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:47:19,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:47:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:47:19,285 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-13 10:47:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:19,400 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2020-10-13 10:47:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:47:19,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 10:47:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:19,412 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:47:19,412 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:47:19,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:47:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:47:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-13 10:47:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:47:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 10:47:19,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2020-10-13 10:47:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:19,458 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 10:47:19,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:47:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 10:47:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:47:19,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:19,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:19,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:47:19,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1720874941, now seen corresponding path program 1 times [2020-10-13 10:47:19,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:19,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012830507] [2020-10-13 10:47:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:47:20,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 10:47:20,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:47:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:47:20,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:20,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:20,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:20,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:47:20,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:20,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:20,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012830507] [2020-10-13 10:47:20,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:20,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:47:20,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132279323] [2020-10-13 10:47:20,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:47:20,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:47:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:20,138 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-13 10:47:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:20,289 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-13 10:47:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:47:20,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:47:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:20,291 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:47:20,292 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:47:20,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:47:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2020-10-13 10:47:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:47:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 10:47:20,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-13 10:47:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:20,300 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 10:47:20,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:47:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 10:47:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:47:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:20,301 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:20,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:47:20,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1615781589, now seen corresponding path program 2 times [2020-10-13 10:47:20,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:20,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601572509] [2020-10-13 10:47:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:47:20,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:20,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:47:20,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:47:20,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:20,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:47:20,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:20,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:20,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:20,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:20,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:47:20,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 10:47:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:20,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601572509] [2020-10-13 10:47:20,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:20,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:47:20,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72230563] [2020-10-13 10:47:20,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:47:20,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:20,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:47:20,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:20,836 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-13 10:47:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:20,959 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-13 10:47:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:47:20,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:47:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:20,961 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:47:20,961 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:47:20,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:47:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-10-13 10:47:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:47:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 10:47:20,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-10-13 10:47:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:20,969 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 10:47:20,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:47:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 10:47:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:47:20,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:20,970 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:20,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:47:20,971 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1642112323, now seen corresponding path program 3 times [2020-10-13 10:47:20,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:20,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898667903] [2020-10-13 10:47:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:21,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:21,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:21,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:47:21,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:21,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-13 10:47:21,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:47:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:21,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:47:21,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:21,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:21,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:21,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:21,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:47:21,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:21,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898667903] [2020-10-13 10:47:21,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:21,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:47:21,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147322072] [2020-10-13 10:47:21,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:47:21,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:47:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:21,872 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-10-13 10:47:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:22,071 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-13 10:47:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:47:22,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-13 10:47:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:22,074 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:47:22,075 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:47:22,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:47:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2020-10-13 10:47:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:47:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 10:47:22,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-13 10:47:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:22,086 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 10:47:22,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:47:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 10:47:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:47:22,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:22,087 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:22,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:47:22,087 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:22,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash -442391509, now seen corresponding path program 4 times [2020-10-13 10:47:22,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:22,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116999728] [2020-10-13 10:47:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:22,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:23,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:23,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:47:23,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:23,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-13 10:47:23,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:23,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:47:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:47:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:23,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:23,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:23,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:23,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:23,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:23,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:23,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:23,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:23,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:47:23,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116999728] [2020-10-13 10:47:23,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:47:23,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:47:23,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855286547] [2020-10-13 10:47:23,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:47:23,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:47:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:23,210 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 10:47:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:23,333 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-13 10:47:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:47:23,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 10:47:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:23,334 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:47:23,335 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:47:23,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:47:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:47:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 10:47:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:47:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 10:47:23,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-10-13 10:47:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:23,342 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 10:47:23,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:47:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 10:47:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:47:23,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:23,343 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:23,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:47:23,343 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -440544467, now seen corresponding path program 1 times [2020-10-13 10:47:23,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:23,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475633189] [2020-10-13 10:47:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:23,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:23,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:47:24,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:24,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:24,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:24,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:24,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:24,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:24,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475633189] [2020-10-13 10:47:24,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:24,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:47:24,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361055338] [2020-10-13 10:47:24,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:47:24,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:47:24,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:24,133 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-13 10:47:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:24,345 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2020-10-13 10:47:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:47:24,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-13 10:47:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:24,349 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:47:24,349 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:47:24,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:47:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:47:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2020-10-13 10:47:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:47:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 10:47:24,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2020-10-13 10:47:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:24,360 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 10:47:24,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:47:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 10:47:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:47:24,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:24,361 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:24,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:47:24,361 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -635653819, now seen corresponding path program 2 times [2020-10-13 10:47:24,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:24,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536179611] [2020-10-13 10:47:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:24,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:25,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:25,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:47:25,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:25,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-13 10:47:25,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:25,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:47:25,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:25,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:47:25,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:25,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:25,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:25,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:25,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:25,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:25,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:47:25,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:25,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:25,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:25,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536179611] [2020-10-13 10:47:25,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:25,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:47:25,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220945428] [2020-10-13 10:47:25,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:47:25,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:47:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:47:25,576 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 10:47:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:25,877 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2020-10-13 10:47:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:47:25,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-13 10:47:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:25,881 INFO L225 Difference]: With dead ends: 83 [2020-10-13 10:47:25,881 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:47:25,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:47:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:47:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 30. [2020-10-13 10:47:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:47:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 10:47:25,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2020-10-13 10:47:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:25,901 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 10:47:25,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:47:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 10:47:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:47:25,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:25,902 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:25,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:47:25,903 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1905890861, now seen corresponding path program 3 times [2020-10-13 10:47:25,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:25,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582956766] [2020-10-13 10:47:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:26,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:26,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:27,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:27,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:47:27,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:27,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-13 10:47:27,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:47:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:47:27,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:27,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:27,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:27,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:27,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:27,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:27,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:27,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582956766] [2020-10-13 10:47:27,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:27,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:47:27,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159568871] [2020-10-13 10:47:27,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:47:27,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:47:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:47:27,238 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-13 10:47:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:27,604 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-10-13 10:47:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:47:27,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-13 10:47:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:27,606 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:47:27,606 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:47:27,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:47:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:47:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2020-10-13 10:47:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:47:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 10:47:27,626 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2020-10-13 10:47:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:27,627 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 10:47:27,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:47:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 10:47:27,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:47:27,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:27,628 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:27,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:47:27,628 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash -910602683, now seen corresponding path program 4 times [2020-10-13 10:47:27,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:27,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700506272] [2020-10-13 10:47:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:27,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:28,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:28,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:28,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:47:28,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:28,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-13 10:47:28,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:28,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:47:28,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:28,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:47:28,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:29,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:29,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:29,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:29,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:29,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:47:29,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:29,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:29,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:29,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:29,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:29,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700506272] [2020-10-13 10:47:29,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:29,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:47:29,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351398492] [2020-10-13 10:47:29,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:47:29,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:47:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:47:29,044 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-13 10:47:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:29,458 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-10-13 10:47:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:47:29,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-13 10:47:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:29,460 INFO L225 Difference]: With dead ends: 97 [2020-10-13 10:47:29,460 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:47:29,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:47:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:47:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2020-10-13 10:47:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:47:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 10:47:29,478 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-10-13 10:47:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:29,480 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 10:47:29,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:47:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 10:47:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:47:29,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:29,481 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:29,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:47:29,482 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1972410669, now seen corresponding path program 5 times [2020-10-13 10:47:29,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:29,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684419778] [2020-10-13 10:47:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:29,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:30,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:30,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:30,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:47:30,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-13 10:47:30,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:47:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:30,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:47:30,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:31,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:31,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:31,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:31,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:31,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:31,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:31,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:31,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:31,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684419778] [2020-10-13 10:47:31,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:31,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:47:31,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249351394] [2020-10-13 10:47:31,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:47:31,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:47:31,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:47:31,185 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-10-13 10:47:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:31,946 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-10-13 10:47:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:47:31,947 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-13 10:47:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:31,949 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:47:31,949 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 10:47:31,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:47:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 10:47:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 33. [2020-10-13 10:47:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:47:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 10:47:31,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2020-10-13 10:47:31,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:31,983 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 10:47:31,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:47:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 10:47:31,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:47:31,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:31,987 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:31,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:47:31,987 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1151511365, now seen corresponding path program 6 times [2020-10-13 10:47:31,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:31,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747826644] [2020-10-13 10:47:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:33,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:33,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:47:33,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-13 10:47:33,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:47:33,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:33,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:47:33,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:33,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:33,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:33,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:33,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:33,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:33,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747826644] [2020-10-13 10:47:33,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:33,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:47:33,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575789937] [2020-10-13 10:47:33,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:47:33,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:47:33,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:47:33,873 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-10-13 10:47:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:34,465 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2020-10-13 10:47:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:47:34,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-13 10:47:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:34,467 INFO L225 Difference]: With dead ends: 111 [2020-10-13 10:47:34,467 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 10:47:34,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:47:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 10:47:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 34. [2020-10-13 10:47:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:47:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 10:47:34,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2020-10-13 10:47:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:34,486 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 10:47:34,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:47:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 10:47:34,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:47:34,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:34,492 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:34,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:47:34,493 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1473436717, now seen corresponding path program 7 times [2020-10-13 10:47:34,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:34,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467348418] [2020-10-13 10:47:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:34,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:35,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:36,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:36,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:47:36,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1806 [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:47:36,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:36,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:36,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:36,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:36,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:36,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:36,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:36,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:36,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:36,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:36,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467348418] [2020-10-13 10:47:36,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:36,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:47:36,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526123092] [2020-10-13 10:47:36,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:47:36,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:47:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:47:36,529 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-10-13 10:47:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:37,159 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2020-10-13 10:47:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:47:37,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-13 10:47:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:37,161 INFO L225 Difference]: With dead ends: 118 [2020-10-13 10:47:37,161 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:47:37,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:47:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:47:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 35. [2020-10-13 10:47:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:47:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 10:47:37,169 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2020-10-13 10:47:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:37,169 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 10:47:37,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:47:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 10:47:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:47:37,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:37,170 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:37,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:47:37,171 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1431779259, now seen corresponding path program 8 times [2020-10-13 10:47:37,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:37,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69129572] [2020-10-13 10:47:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:37,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:37,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:38,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:39,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:39,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:47:39,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2558 [2020-10-13 10:47:39,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:47:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:39,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:47:39,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:40,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:40,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:40,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:40,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:40,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:40,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:40,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:40,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:40,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69129572] [2020-10-13 10:47:40,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:40,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:47:40,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181698779] [2020-10-13 10:47:40,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:47:40,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:40,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:47:40,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:47:40,057 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 15 states. [2020-10-13 10:47:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:40,917 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2020-10-13 10:47:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:47:40,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-13 10:47:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:40,919 INFO L225 Difference]: With dead ends: 125 [2020-10-13 10:47:40,919 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 10:47:40,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:47:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 10:47:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 36. [2020-10-13 10:47:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:47:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 10:47:40,936 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2020-10-13 10:47:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:40,937 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 10:47:40,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:47:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 10:47:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:47:40,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:40,938 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:40,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:47:40,939 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1299161299, now seen corresponding path program 9 times [2020-10-13 10:47:40,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386813090] [2020-10-13 10:47:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:41,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:42,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:42,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:42,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:47:42,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-13 10:47:42,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:47:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:47:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:43,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:43,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:43,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:43,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:43,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:43,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:43,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:43,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:43,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:43,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:43,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:43,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386813090] [2020-10-13 10:47:43,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:43,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:47:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837923488] [2020-10-13 10:47:43,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:47:43,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:47:43,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:47:43,164 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-10-13 10:47:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:44,077 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2020-10-13 10:47:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:47:44,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-13 10:47:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:44,079 INFO L225 Difference]: With dead ends: 132 [2020-10-13 10:47:44,080 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 10:47:44,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:47:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 10:47:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 37. [2020-10-13 10:47:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:47:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 10:47:44,098 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2020-10-13 10:47:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:44,099 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 10:47:44,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:47:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 10:47:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:47:44,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:44,100 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:44,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:47:44,101 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:44,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1482971835, now seen corresponding path program 10 times [2020-10-13 10:47:44,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:44,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544954732] [2020-10-13 10:47:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:46,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:46,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:47:46,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-13 10:47:46,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:46,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:47:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:46,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:47:46,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:46,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:46,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:46,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544954732] [2020-10-13 10:47:46,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:46,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:47:46,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2326782] [2020-10-13 10:47:46,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:47:46,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:47:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:47:46,457 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-10-13 10:47:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:47,642 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2020-10-13 10:47:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:47:47,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-13 10:47:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:47,644 INFO L225 Difference]: With dead ends: 139 [2020-10-13 10:47:47,645 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 10:47:47,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:47:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 10:47:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 38. [2020-10-13 10:47:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:47:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 10:47:47,654 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-10-13 10:47:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:47,654 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 10:47:47,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:47:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 10:47:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:47:47,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:47,655 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:47,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:47:47,656 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:47,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1408836141, now seen corresponding path program 11 times [2020-10-13 10:47:47,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:47,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573598503] [2020-10-13 10:47:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:48,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:49,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:51,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:51,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:47:51,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:51,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3537 [2020-10-13 10:47:51,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:47:51,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:51,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:47:51,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:51,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:51,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:51,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:51,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:51,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:47:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:51,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:51,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:51,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573598503] [2020-10-13 10:47:51,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:51,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:47:51,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701003858] [2020-10-13 10:47:51,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:47:51,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:51,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:47:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:47:51,527 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 18 states. [2020-10-13 10:47:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:52,700 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2020-10-13 10:47:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:47:52,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-13 10:47:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:52,703 INFO L225 Difference]: With dead ends: 146 [2020-10-13 10:47:52,703 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:47:52,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:47:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:47:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 39. [2020-10-13 10:47:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:47:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 10:47:52,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 28 [2020-10-13 10:47:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:52,720 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 10:47:52,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:47:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 10:47:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:47:52,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:52,721 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:52,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:47:52,721 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash 860570181, now seen corresponding path program 12 times [2020-10-13 10:47:52,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:52,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064238612] [2020-10-13 10:47:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:55,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:55,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:47:55,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:55,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3127 [2020-10-13 10:47:55,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:47:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:47:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:47:55,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:56,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:56,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:47:56,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:56,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:56,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:56,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:56,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:56,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:56,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:56,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064238612] [2020-10-13 10:47:56,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:56,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:47:56,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122740346] [2020-10-13 10:47:56,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:47:56,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:56,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:47:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:47:56,205 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 19 states. [2020-10-13 10:47:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:57,466 INFO L93 Difference]: Finished difference Result 153 states and 205 transitions. [2020-10-13 10:47:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:47:57,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-13 10:47:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:57,469 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:47:57,469 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 10:47:57,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:47:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 10:47:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 40. [2020-10-13 10:47:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:47:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 10:47:57,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2020-10-13 10:47:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:57,478 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 10:47:57,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:47:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 10:47:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:47:57,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:57,479 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:57,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:47:57,480 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1044194605, now seen corresponding path program 13 times [2020-10-13 10:47:57,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:57,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789752025] [2020-10-13 10:47:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:58,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:01,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:01,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:48:01,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:01,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3665 [2020-10-13 10:48:01,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:48:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:48:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:48:01,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:01,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:01,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:01,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:01,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:01,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:01,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:01,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:01,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:01,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789752025] [2020-10-13 10:48:01,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:01,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:48:01,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793689629] [2020-10-13 10:48:01,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:48:01,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:48:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:48:01,515 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2020-10-13 10:48:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:02,807 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2020-10-13 10:48:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:48:02,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-10-13 10:48:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:02,809 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:48:02,809 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:48:02,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:48:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:48:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 41. [2020-10-13 10:48:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:48:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 10:48:02,819 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 30 [2020-10-13 10:48:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:02,820 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 10:48:02,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:48:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 10:48:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:48:02,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:02,820 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:02,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:48:02,821 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1853382843, now seen corresponding path program 14 times [2020-10-13 10:48:02,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:02,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325095012] [2020-10-13 10:48:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:06,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:06,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:48:06,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3726 [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:48:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:06,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:06,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:06,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:06,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:06,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:06,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:06,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:06,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325095012] [2020-10-13 10:48:06,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:06,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:48:06,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818999067] [2020-10-13 10:48:06,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:48:06,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:48:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:48:06,936 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 21 states. [2020-10-13 10:48:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:08,455 INFO L93 Difference]: Finished difference Result 167 states and 225 transitions. [2020-10-13 10:48:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:48:08,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-13 10:48:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:08,458 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:48:08,458 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:48:08,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:48:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:48:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 42. [2020-10-13 10:48:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:48:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-13 10:48:08,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 31 [2020-10-13 10:48:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:08,468 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-13 10:48:08,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:48:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-13 10:48:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:48:08,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:08,469 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:08,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:48:08,469 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1483970515, now seen corresponding path program 15 times [2020-10-13 10:48:08,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:08,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585017471] [2020-10-13 10:48:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:08,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2296 [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:10,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:48:10,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:10,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:48:10,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:11,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:11,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:11,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585017471] [2020-10-13 10:48:11,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:11,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:48:11,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980340172] [2020-10-13 10:48:11,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:48:11,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:48:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:48:11,191 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 22 states. [2020-10-13 10:48:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:12,853 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2020-10-13 10:48:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:48:12,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2020-10-13 10:48:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:12,856 INFO L225 Difference]: With dead ends: 174 [2020-10-13 10:48:12,856 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:48:12,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:48:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:48:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 43. [2020-10-13 10:48:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:48:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 10:48:12,867 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2020-10-13 10:48:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:12,867 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 10:48:12,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:48:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 10:48:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:48:12,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:12,868 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:12,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:48:12,869 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1377877061, now seen corresponding path program 16 times [2020-10-13 10:48:12,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:12,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066924712] [2020-10-13 10:48:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:12,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:13,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:15,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:15,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:48:15,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:15,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2313 [2020-10-13 10:48:15,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:15,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:48:15,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:15,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:48:15,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:15,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:15,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:15,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:15,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:15,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:15,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:15,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066924712] [2020-10-13 10:48:15,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:15,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:48:15,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058005504] [2020-10-13 10:48:15,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:48:15,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:48:15,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:48:15,630 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 23 states. [2020-10-13 10:48:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:17,448 INFO L93 Difference]: Finished difference Result 181 states and 245 transitions. [2020-10-13 10:48:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:48:17,449 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-10-13 10:48:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:17,451 INFO L225 Difference]: With dead ends: 181 [2020-10-13 10:48:17,452 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 10:48:17,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:48:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 10:48:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 44. [2020-10-13 10:48:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:48:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 10:48:17,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-10-13 10:48:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:17,463 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 10:48:17,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:48:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 10:48:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:48:17,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:17,464 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:17,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:48:17,464 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash -99161299, now seen corresponding path program 17 times [2020-10-13 10:48:17,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:17,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821592402] [2020-10-13 10:48:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:17,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:19,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:20,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2901 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:48:20,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:20,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:20,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:20,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:20,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821592402] [2020-10-13 10:48:20,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:20,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:48:20,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229675613] [2020-10-13 10:48:20,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:48:20,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:48:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:48:20,869 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 24 states. [2020-10-13 10:48:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:22,846 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2020-10-13 10:48:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:48:22,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-10-13 10:48:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:22,851 INFO L225 Difference]: With dead ends: 188 [2020-10-13 10:48:22,851 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 10:48:22,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:48:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 10:48:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 45. [2020-10-13 10:48:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:48:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 10:48:22,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2020-10-13 10:48:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:22,875 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 10:48:22,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:48:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 10:48:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:48:22,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:22,876 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:22,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:48:22,876 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1357289797, now seen corresponding path program 18 times [2020-10-13 10:48:22,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:22,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664205809] [2020-10-13 10:48:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:22,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:23,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:24,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:26,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3684 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:48:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:27,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:27,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:27,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:27,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:27,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:27,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:27,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664205809] [2020-10-13 10:48:27,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:27,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:48:27,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729790112] [2020-10-13 10:48:27,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:48:27,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:48:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:48:27,102 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 25 states. [2020-10-13 10:48:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:29,273 INFO L93 Difference]: Finished difference Result 195 states and 265 transitions. [2020-10-13 10:48:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:48:29,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 35 [2020-10-13 10:48:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:29,276 INFO L225 Difference]: With dead ends: 195 [2020-10-13 10:48:29,276 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 10:48:29,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:48:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 10:48:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 46. [2020-10-13 10:48:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:48:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-13 10:48:29,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2020-10-13 10:48:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:29,288 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-13 10:48:29,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:48:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-13 10:48:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:48:29,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:29,289 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:29,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:48:29,289 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -737366483, now seen corresponding path program 19 times [2020-10-13 10:48:29,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:29,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718215199] [2020-10-13 10:48:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:29,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3839 [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:48:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:48:33,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:33,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:33,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:33,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:33,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:33,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:48:33,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:33,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:33,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718215199] [2020-10-13 10:48:33,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:33,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:48:33,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360926462] [2020-10-13 10:48:33,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:48:33,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:33,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:48:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:48:33,695 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 26 states. [2020-10-13 10:48:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:36,113 INFO L93 Difference]: Finished difference Result 202 states and 275 transitions. [2020-10-13 10:48:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:48:36,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-10-13 10:48:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:36,116 INFO L225 Difference]: With dead ends: 202 [2020-10-13 10:48:36,116 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 10:48:36,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:48:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 10:48:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 47. [2020-10-13 10:48:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:48:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 10:48:36,135 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2020-10-13 10:48:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:36,136 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 10:48:36,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:48:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 10:48:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:48:36,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:36,136 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:36,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:48:36,140 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1247201723, now seen corresponding path program 20 times [2020-10-13 10:48:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:36,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962953960] [2020-10-13 10:48:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:36,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:37,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:39,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:39,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:39,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:48:39,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:39,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3686 [2020-10-13 10:48:39,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:48:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:48:39,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:40,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:40,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:40,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:40,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:40,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:40,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:40,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:40,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:40,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:40,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962953960] [2020-10-13 10:48:40,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:40,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:48:40,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186869166] [2020-10-13 10:48:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:48:40,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:48:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:48:40,446 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 27 states. [2020-10-13 10:48:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:42,954 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2020-10-13 10:48:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:48:42,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-10-13 10:48:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:42,956 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:48:42,956 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 10:48:42,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:48:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 10:48:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 48. [2020-10-13 10:48:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:48:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 10:48:42,968 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2020-10-13 10:48:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:42,968 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 10:48:42,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:48:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 10:48:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:48:42,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:42,969 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:42,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:48:42,969 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 127775021, now seen corresponding path program 21 times [2020-10-13 10:48:42,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:42,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819217432] [2020-10-13 10:48:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:43,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:43,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:45,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4049 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:48:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:47,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:47,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:47,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819217432] [2020-10-13 10:48:47,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:47,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:48:47,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412884065] [2020-10-13 10:48:47,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:48:47,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:48:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:48:47,638 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 28 states. [2020-10-13 10:48:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:50,443 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2020-10-13 10:48:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:48:50,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 38 [2020-10-13 10:48:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:50,446 INFO L225 Difference]: With dead ends: 216 [2020-10-13 10:48:50,446 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 10:48:50,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:48:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 10:48:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 49. [2020-10-13 10:48:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:48:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-13 10:48:50,460 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2020-10-13 10:48:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:50,460 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-13 10:48:50,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:48:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-13 10:48:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:48:50,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:50,461 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:50,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:48:50,462 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash -197618875, now seen corresponding path program 22 times [2020-10-13 10:48:50,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:50,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709481674] [2020-10-13 10:48:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:51,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:48:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:48:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 10:48:55,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:48:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:48:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:48:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:48:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:56,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:48:56,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:48:56,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:48:56,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:48:56,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:48:56,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:48:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:48:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:48:56,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:48:56,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:48:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:48:56,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709481674] [2020-10-13 10:48:56,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:48:56,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:48:56,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410981669] [2020-10-13 10:48:56,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:48:56,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:48:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:48:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:48:56,182 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2020-10-13 10:48:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:48:59,047 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2020-10-13 10:48:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:48:59,048 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 39 [2020-10-13 10:48:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:48:59,051 INFO L225 Difference]: With dead ends: 223 [2020-10-13 10:48:59,051 INFO L226 Difference]: Without dead ends: 206 [2020-10-13 10:48:59,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:48:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-13 10:48:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 50. [2020-10-13 10:48:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:48:59,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 10:48:59,064 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2020-10-13 10:48:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:48:59,064 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 10:48:59,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:48:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 10:48:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:48:59,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:48:59,065 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:48:59,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:48:59,065 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:48:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:48:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1694895059, now seen corresponding path program 23 times [2020-10-13 10:48:59,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:48:59,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839080280] [2020-10-13 10:48:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:48:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:48:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:04,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:04,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:49:04,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:49:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 10:49:04,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:04,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:49:04,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:04,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:49:04,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:04,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:04,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:04,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:04,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:04,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:04,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:04,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:04,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:04,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839080280] [2020-10-13 10:49:04,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:04,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:49:04,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613765278] [2020-10-13 10:49:04,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:49:04,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:49:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:49:04,855 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 30 states. [2020-10-13 10:49:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:07,999 INFO L93 Difference]: Finished difference Result 230 states and 315 transitions. [2020-10-13 10:49:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:49:08,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 40 [2020-10-13 10:49:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:08,003 INFO L225 Difference]: With dead ends: 230 [2020-10-13 10:49:08,003 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 10:49:08,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:49:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 10:49:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 51. [2020-10-13 10:49:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:49:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 10:49:08,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 40 [2020-10-13 10:49:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:08,018 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 10:49:08,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:49:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 10:49:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:49:08,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:08,019 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:08,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:49:08,019 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash -865816507, now seen corresponding path program 24 times [2020-10-13 10:49:08,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:08,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124034908] [2020-10-13 10:49:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:08,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:13,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:13,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:49:13,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:49:13,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 10:49:13,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:49:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:49:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:13,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:13,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:13,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:13,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:13,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124034908] [2020-10-13 10:49:13,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:13,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:49:13,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394202068] [2020-10-13 10:49:13,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:49:13,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:49:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:49:13,847 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 31 states. [2020-10-13 10:49:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:17,300 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2020-10-13 10:49:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:49:17,301 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2020-10-13 10:49:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:17,303 INFO L225 Difference]: With dead ends: 237 [2020-10-13 10:49:17,303 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 10:49:17,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:49:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 10:49:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 52. [2020-10-13 10:49:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:49:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 10:49:17,324 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2020-10-13 10:49:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:17,324 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 10:49:17,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:49:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 10:49:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:49:17,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:17,325 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:17,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:49:17,325 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -934185171, now seen corresponding path program 25 times [2020-10-13 10:49:17,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:17,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008680196] [2020-10-13 10:49:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:17,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:21,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:22,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:22,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:49:22,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:49:22,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 10:49:22,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:49:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:22,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:49:22,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:23,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:23,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:23,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:23,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:23,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008680196] [2020-10-13 10:49:23,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:23,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:49:23,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747612113] [2020-10-13 10:49:23,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:49:23,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:49:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:49:23,243 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 32 states. [2020-10-13 10:49:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:27,139 INFO L93 Difference]: Finished difference Result 244 states and 335 transitions. [2020-10-13 10:49:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:49:27,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2020-10-13 10:49:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:27,144 INFO L225 Difference]: With dead ends: 244 [2020-10-13 10:49:27,144 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 10:49:27,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:49:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 10:49:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 53. [2020-10-13 10:49:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:49:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 10:49:27,161 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2020-10-13 10:49:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:27,161 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 10:49:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:49:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 10:49:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:49:27,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:27,162 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:27,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:49:27,163 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1241353541, now seen corresponding path program 26 times [2020-10-13 10:49:27,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:27,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377531921] [2020-10-13 10:49:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:32,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:49:32,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:32,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:49:32,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:33,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:33,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377531921] [2020-10-13 10:49:33,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:33,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:49:33,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228217415] [2020-10-13 10:49:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:49:33,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:49:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:49:33,158 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 33 states. [2020-10-13 10:49:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:37,277 INFO L93 Difference]: Finished difference Result 251 states and 345 transitions. [2020-10-13 10:49:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:49:37,279 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 43 [2020-10-13 10:49:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:37,280 INFO L225 Difference]: With dead ends: 251 [2020-10-13 10:49:37,280 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 10:49:37,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:49:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 10:49:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 54. [2020-10-13 10:49:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:49:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 10:49:37,297 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 43 [2020-10-13 10:49:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:37,298 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 10:49:37,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:49:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 10:49:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:49:37,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:37,299 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:37,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:49:37,299 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash -36423123, now seen corresponding path program 27 times [2020-10-13 10:49:37,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:37,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196373487] [2020-10-13 10:49:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:37,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:38,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:42,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:42,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:49:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:43,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:43,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:43,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:43,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196373487] [2020-10-13 10:49:43,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:43,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:49:43,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961633963] [2020-10-13 10:49:43,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:49:43,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:43,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:49:43,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:49:43,357 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 34 states. [2020-10-13 10:49:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:48,096 INFO L93 Difference]: Finished difference Result 258 states and 355 transitions. [2020-10-13 10:49:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:49:48,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 44 [2020-10-13 10:49:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:48,099 INFO L225 Difference]: With dead ends: 258 [2020-10-13 10:49:48,099 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 10:49:48,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:49:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 10:49:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 55. [2020-10-13 10:49:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:49:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 10:49:48,119 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2020-10-13 10:49:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:48,120 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 10:49:48,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:49:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 10:49:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:49:48,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:48,120 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:48,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:49:48,121 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -992794043, now seen corresponding path program 28 times [2020-10-13 10:49:48,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:48,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803417805] [2020-10-13 10:49:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:49:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:49:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:54,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:49:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:49:54,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:49:54,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:49:54,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:49:54,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:49:54,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:49:54,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:49:54,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:49:54,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:49:54,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:49:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:49:54,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803417805] [2020-10-13 10:49:54,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:49:54,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:49:54,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598122181] [2020-10-13 10:49:54,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:49:54,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:49:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:49:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:49:54,233 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 35 states. [2020-10-13 10:49:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:49:59,428 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2020-10-13 10:49:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:49:59,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 45 [2020-10-13 10:49:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:49:59,432 INFO L225 Difference]: With dead ends: 265 [2020-10-13 10:49:59,432 INFO L226 Difference]: Without dead ends: 248 [2020-10-13 10:49:59,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:49:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-13 10:49:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 56. [2020-10-13 10:49:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:49:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 10:49:59,455 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2020-10-13 10:49:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:49:59,455 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 10:49:59,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:49:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 10:49:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:49:59,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:49:59,459 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:49:59,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:49:59,460 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:49:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:49:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -575521491, now seen corresponding path program 29 times [2020-10-13 10:49:59,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:49:59,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093548623] [2020-10-13 10:49:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:49:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:49:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:01,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:04,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:50:04,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:05,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:05,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:05,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:50:05,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:05,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:50:05,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:05,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:05,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:05,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093548623] [2020-10-13 10:50:05,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:05,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:50:05,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642943711] [2020-10-13 10:50:05,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:50:05,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:50:05,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:50:05,722 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 36 states. [2020-10-13 10:50:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:11,749 INFO L93 Difference]: Finished difference Result 272 states and 375 transitions. [2020-10-13 10:50:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:50:11,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 46 [2020-10-13 10:50:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:11,753 INFO L225 Difference]: With dead ends: 272 [2020-10-13 10:50:11,753 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 10:50:11,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:50:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 10:50:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 57. [2020-10-13 10:50:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:50:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-13 10:50:11,780 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 46 [2020-10-13 10:50:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:11,780 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-13 10:50:11,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:50:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-13 10:50:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:50:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:11,781 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:11,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:50:11,781 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:11,782 INFO L82 PathProgramCache]: Analyzing trace with hash -524974267, now seen corresponding path program 30 times [2020-10-13 10:50:11,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:11,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797996038] [2020-10-13 10:50:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:11,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:13,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:16,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:16,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 10:50:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:18,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:18,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:18,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:18,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:50:18,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:18,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:50:18,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:18,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:18,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:18,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797996038] [2020-10-13 10:50:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:50:18,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177902419] [2020-10-13 10:50:18,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:50:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:50:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:50:18,196 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 37 states. [2020-10-13 10:50:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:24,495 INFO L93 Difference]: Finished difference Result 279 states and 385 transitions. [2020-10-13 10:50:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:50:24,497 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 47 [2020-10-13 10:50:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:24,499 INFO L225 Difference]: With dead ends: 279 [2020-10-13 10:50:24,499 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 10:50:24,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:50:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 10:50:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 58. [2020-10-13 10:50:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:50:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 10:50:24,521 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2020-10-13 10:50:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:24,522 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 10:50:24,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:50:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 10:50:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:50:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:24,523 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:24,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:50:24,523 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1041989677, now seen corresponding path program 31 times [2020-10-13 10:50:24,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:24,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250990406] [2020-10-13 10:50:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:24,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:29,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:29,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:50:29,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:50:29,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-13 10:50:29,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:29,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:50:29,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:50:29,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:50:29,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:31,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:31,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:50:31,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:31,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250990406] [2020-10-13 10:50:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:50:31,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221938882] [2020-10-13 10:50:31,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:50:31,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:50:31,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:50:31,115 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 38 states. [2020-10-13 10:50:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:38,169 INFO L93 Difference]: Finished difference Result 286 states and 395 transitions. [2020-10-13 10:50:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:50:38,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 48 [2020-10-13 10:50:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:38,174 INFO L225 Difference]: With dead ends: 286 [2020-10-13 10:50:38,174 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 10:50:38,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:50:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 10:50:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 59. [2020-10-13 10:50:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 10:50:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 10:50:38,198 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 48 [2020-10-13 10:50:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:38,199 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 10:50:38,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:50:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 10:50:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:50:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:38,200 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:38,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:50:38,200 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:38,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1921735611, now seen corresponding path program 32 times [2020-10-13 10:50:38,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:38,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897992056] [2020-10-13 10:50:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:40,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:50:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:50:43,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:50:43,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:44,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:44,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:44,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:50:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:50:44,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:44,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:44,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897992056] [2020-10-13 10:50:44,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:44,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:50:44,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834629575] [2020-10-13 10:50:44,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:50:44,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:44,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:50:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:50:44,995 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 39 states. [2020-10-13 10:50:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:50:53,042 INFO L93 Difference]: Finished difference Result 293 states and 405 transitions. [2020-10-13 10:50:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:50:53,044 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 49 [2020-10-13 10:50:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:50:53,046 INFO L225 Difference]: With dead ends: 293 [2020-10-13 10:50:53,046 INFO L226 Difference]: Without dead ends: 276 [2020-10-13 10:50:53,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:50:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-13 10:50:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 60. [2020-10-13 10:50:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:50:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 10:50:53,072 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 49 [2020-10-13 10:50:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:50:53,072 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 10:50:53,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:50:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 10:50:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:50:53,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:50:53,073 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:50:53,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:50:53,073 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:50:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:50:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash 692060973, now seen corresponding path program 33 times [2020-10-13 10:50:53,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:50:53,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320363326] [2020-10-13 10:50:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:50:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:53,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:55,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:58,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:58,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:50:58,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:50:58,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:59,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:50:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:50:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:50:59,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:50:59,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:50:59,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:50:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:50:59,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:50:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:50:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:50:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:50:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:50:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:50:59,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320363326] [2020-10-13 10:50:59,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:50:59,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:50:59,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632392853] [2020-10-13 10:50:59,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:50:59,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:50:59,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:50:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:50:59,760 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 40 states.