/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:02:08,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:02:08,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:02:08,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:02:08,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:02:08,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:02:08,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:02:08,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:02:08,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:02:08,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:02:08,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:02:08,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:02:08,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:02:08,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:02:08,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:02:08,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:02:08,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:02:08,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:02:08,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:02:08,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:02:08,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:02:08,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:02:08,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:02:08,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:02:08,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:02:08,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:02:08,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:02:08,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:02:08,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:02:08,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:02:08,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:02:08,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:02:08,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:02:08,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:02:08,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:02:08,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:02:08,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:02:08,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:02:08,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:02:08,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:02:08,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:02:08,798 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 [2020-10-15 00:02:08,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:02:08,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:02:08,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:02:08,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:02:08,820 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:02:08,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:02:08,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:02:08,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:02:08,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:02:08,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:02:08,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:02:08,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:02:08,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:02:08,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:02:08,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:02:08,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:02:08,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:02:08,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:02:08,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:02:08,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:02:08,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:02:08,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:02:08,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:02:08,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:02:08,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:02:09,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:02:09,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:02:09,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:02:09,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:02:09,156 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:02:09,157 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2020-10-15 00:02:09,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b97bbfc7/5b15f0cf772f490e9c0c1cee83a52f1c/FLAG7f9d67427 [2020-10-15 00:02:09,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:02:09,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2020-10-15 00:02:09,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b97bbfc7/5b15f0cf772f490e9c0c1cee83a52f1c/FLAG7f9d67427 [2020-10-15 00:02:10,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b97bbfc7/5b15f0cf772f490e9c0c1cee83a52f1c [2020-10-15 00:02:10,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:02:10,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:02:10,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:10,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:02:10,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:02:10,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49320105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10, skipping insertion in model container [2020-10-15 00:02:10,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:02:10,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:02:10,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:10,249 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:02:10,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:10,279 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:02:10,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10 WrapperNode [2020-10-15 00:02:10,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:10,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:02:10,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:02:10,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:02:10,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (1/1) ... [2020-10-15 00:02:10,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:02:10,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:02:10,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:02:10,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:02:10,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (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 [2020-10-15 00:02:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:02:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:02:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:02:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:02:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:02:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:02:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:02:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:02:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:02:10,645 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:02:10,645 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 00:02:10,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:10 BoogieIcfgContainer [2020-10-15 00:02:10,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:02:10,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:02:10,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:02:10,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:02:10,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:10" (1/3) ... [2020-10-15 00:02:10,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8950c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:10, skipping insertion in model container [2020-10-15 00:02:10,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:10" (2/3) ... [2020-10-15 00:02:10,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8950c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:10, skipping insertion in model container [2020-10-15 00:02:10,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:10" (3/3) ... [2020-10-15 00:02:10,657 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2020-10-15 00:02:10,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:02:10,677 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:02:10,690 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:02:10,714 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:02:10,714 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:02:10,714 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:02:10,714 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:02:10,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:02:10,715 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:02:10,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:02:10,715 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:02:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-15 00:02:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:02:10,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:10,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:10,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-15 00:02:10,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:10,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038043804] [2020-10-15 00:02:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:10,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:10,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:02:11,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:11,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-15 00:02:11,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:02:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:02:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:02:11,199 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 8 [2020-10-15 00:02:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:11,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:11,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:02:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:11,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:02:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:11,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038043804] [2020-10-15 00:02:11,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:02:11,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:02:11,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367440380] [2020-10-15 00:02:11,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:02:11,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:02:11,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:11,313 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-15 00:02:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:11,402 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-10-15 00:02:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:11,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-15 00:02:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:11,413 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:02:11,413 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:02:11,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:02:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-15 00:02:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 00:02:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-10-15 00:02:11,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2020-10-15 00:02:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:11,454 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-10-15 00:02:11,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:02:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-10-15 00:02:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:02:11,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:11,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:11,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:02:11,456 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-15 00:02:11,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:11,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350439768] [2020-10-15 00:02:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:02:11,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-15 00:02:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:02:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:02:11,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:11,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:11,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:11,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:11,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:11,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:11,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:11,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350439768] [2020-10-15 00:02:11,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:11,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:02:11,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996811071] [2020-10-15 00:02:11,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:02:11,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:11,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:02:11,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:11,689 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2020-10-15 00:02:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:11,709 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2020-10-15 00:02:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:02:11,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-15 00:02:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:11,710 INFO L225 Difference]: With dead ends: 23 [2020-10-15 00:02:11,710 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 00:02:11,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 00:02:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2020-10-15 00:02:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 00:02:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-15 00:02:11,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-15 00:02:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:11,719 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-15 00:02:11,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:02:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-15 00:02:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:02:11,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:11,720 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:11,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:02:11,721 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1774582, now seen corresponding path program 2 times [2020-10-15 00:02:11,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:11,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052074196] [2020-10-15 00:02:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:02:11,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:11,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-15 00:02:11,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:02:11,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:11,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:02:11,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:12,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:12,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:12,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:12,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:12,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:12,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052074196] [2020-10-15 00:02:12,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:12,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:02:12,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135011836] [2020-10-15 00:02:12,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:02:12,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:02:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:12,062 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 7 states. [2020-10-15 00:02:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:12,103 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-15 00:02:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:02:12,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-15 00:02:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:12,104 INFO L225 Difference]: With dead ends: 27 [2020-10-15 00:02:12,104 INFO L226 Difference]: Without dead ends: 17 [2020-10-15 00:02:12,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-15 00:02:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-15 00:02:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 00:02:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-15 00:02:12,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-15 00:02:12,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:12,110 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-15 00:02:12,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:02:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-15 00:02:12,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:02:12,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:12,112 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:12,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:02:12,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1064511975, now seen corresponding path program 1 times [2020-10-15 00:02:12,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:12,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818741149] [2020-10-15 00:02:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 00:02:12,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:12,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-15 00:02:12,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:02:12,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:12,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:02:12,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:12,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:12,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818741149] [2020-10-15 00:02:12,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:12,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:02:12,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800804243] [2020-10-15 00:02:12,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:02:12,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:12,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:02:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:12,238 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-15 00:02:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:12,256 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-15 00:02:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:12,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-15 00:02:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:12,257 INFO L225 Difference]: With dead ends: 23 [2020-10-15 00:02:12,257 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 00:02:12,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 00:02:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-15 00:02:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 00:02:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-15 00:02:12,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-15 00:02:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:12,264 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-15 00:02:12,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:02:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-15 00:02:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:02:12,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:12,265 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:12,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:02:12,265 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1395404903, now seen corresponding path program 2 times [2020-10-15 00:02:12,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:12,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808407962] [2020-10-15 00:02:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:02:12,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:12,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-15 00:02:12,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:02:12,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:12,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:02:12,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:12,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:12,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:12,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808407962] [2020-10-15 00:02:12,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:12,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:02:12,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846313333] [2020-10-15 00:02:12,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:02:12,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:02:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:12,568 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-10-15 00:02:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:12,622 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-15 00:02:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:02:12,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-15 00:02:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:12,623 INFO L225 Difference]: With dead ends: 31 [2020-10-15 00:02:12,623 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 00:02:12,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 00:02:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-15 00:02:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:02:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-15 00:02:12,629 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-15 00:02:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:12,629 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-15 00:02:12,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:02:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-15 00:02:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:02:12,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:12,631 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:12,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:02:12,631 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1230706532, now seen corresponding path program 3 times [2020-10-15 00:02:12,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:12,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337983687] [2020-10-15 00:02:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:02:12,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:12,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-15 00:02:12,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:02:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:12,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:02:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:12,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:12,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:12,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:12,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:12,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:02:12,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337983687] [2020-10-15 00:02:12,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:12,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:02:12,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328638062] [2020-10-15 00:02:12,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:02:12,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:02:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:12,779 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-10-15 00:02:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:12,800 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-15 00:02:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:02:12,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-15 00:02:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:12,801 INFO L225 Difference]: With dead ends: 26 [2020-10-15 00:02:12,801 INFO L226 Difference]: Without dead ends: 21 [2020-10-15 00:02:12,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-15 00:02:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-15 00:02:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:02:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-15 00:02:12,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-15 00:02:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:12,808 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-15 00:02:12,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:02:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-15 00:02:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:02:12,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:12,809 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:12,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:02:12,810 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash -467265412, now seen corresponding path program 4 times [2020-10-15 00:02:12,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:12,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651101116] [2020-10-15 00:02:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:02:13,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-15 00:02:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:02:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:02:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:13,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:13,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:13,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:13,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:13,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:13,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:13,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651101116] [2020-10-15 00:02:13,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:13,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:02:13,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935957203] [2020-10-15 00:02:13,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:02:13,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:02:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:13,138 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-10-15 00:02:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:13,211 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-15 00:02:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:13,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-15 00:02:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:13,213 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:02:13,213 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:02:13,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:02:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-15 00:02:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:02:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-15 00:02:13,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-15 00:02:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:13,220 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-15 00:02:13,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:02:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-15 00:02:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 00:02:13,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:13,221 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:13,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:02:13,222 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2143783841, now seen corresponding path program 5 times [2020-10-15 00:02:13,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:13,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257726735] [2020-10-15 00:02:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-15 00:02:13,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:13,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-15 00:02:13,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:02:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:13,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:02:13,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:13,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:13,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:13,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:13,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:13,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 00:02:13,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257726735] [2020-10-15 00:02:13,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:13,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:02:13,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724288058] [2020-10-15 00:02:13,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:02:13,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:02:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:13,425 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-15 00:02:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:13,446 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-15 00:02:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:02:13,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-15 00:02:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:13,447 INFO L225 Difference]: With dead ends: 29 [2020-10-15 00:02:13,447 INFO L226 Difference]: Without dead ends: 24 [2020-10-15 00:02:13,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-15 00:02:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-15 00:02:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:02:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-15 00:02:13,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-15 00:02:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:13,453 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-15 00:02:13,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:02:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-15 00:02:13,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:02:13,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:13,454 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:13,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:02:13,455 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:13,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1997251871, now seen corresponding path program 6 times [2020-10-15 00:02:13,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:13,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121156424] [2020-10-15 00:02:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:02:13,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-15 00:02:13,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:02:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:13,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:02:13,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:13,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:13,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:13,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:13,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:13,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121156424] [2020-10-15 00:02:13,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:13,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:13,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798713747] [2020-10-15 00:02:13,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:13,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:13,787 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-10-15 00:02:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:13,883 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-15 00:02:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:02:13,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-15 00:02:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:13,885 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:02:13,885 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:02:13,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:02:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-15 00:02:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:02:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-15 00:02:13,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-15 00:02:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:13,891 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-15 00:02:13,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-15 00:02:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:02:13,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:13,893 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:13,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:02:13,893 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:13,894 INFO L82 PathProgramCache]: Analyzing trace with hash -983085026, now seen corresponding path program 7 times [2020-10-15 00:02:13,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:13,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132455614] [2020-10-15 00:02:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:02:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:14,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-15 00:02:14,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:02:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:02:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:14,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:14,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:14,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-15 00:02:14,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132455614] [2020-10-15 00:02:14,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:14,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:02:14,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565263004] [2020-10-15 00:02:14,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:02:14,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:02:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:14,129 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-15 00:02:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:14,150 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-15 00:02:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:02:14,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-15 00:02:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:14,151 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:02:14,151 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:02:14,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:02:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-15 00:02:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:02:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-15 00:02:14,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-15 00:02:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:14,157 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-15 00:02:14,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:02:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-15 00:02:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:02:14,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:14,158 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:14,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:02:14,159 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash -375326974, now seen corresponding path program 8 times [2020-10-15 00:02:14,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:14,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978582862] [2020-10-15 00:02:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:02:14,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:14,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:02:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:14,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:14,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:14,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:14,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978582862] [2020-10-15 00:02:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:02:14,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895765016] [2020-10-15 00:02:14,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:02:14,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:02:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:14,565 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-10-15 00:02:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:14,648 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-15 00:02:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:02:14,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-15 00:02:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:14,650 INFO L225 Difference]: With dead ends: 43 [2020-10-15 00:02:14,650 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:02:14,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:02:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-15 00:02:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:02:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-15 00:02:14,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-15 00:02:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:14,655 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-15 00:02:14,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:02:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-15 00:02:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:02:14,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:14,656 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:14,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:02:14,657 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1869192357, now seen corresponding path program 9 times [2020-10-15 00:02:14,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:14,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620730313] [2020-10-15 00:02:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:02:14,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:14,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-15 00:02:14,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:02:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:14,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:02:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:14,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:14,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:14,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:14,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:14,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:14,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620730313] [2020-10-15 00:02:14,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:14,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:02:14,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474416400] [2020-10-15 00:02:14,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:02:14,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:14,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:02:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:14,941 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-15 00:02:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:14,965 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-15 00:02:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:02:14,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-15 00:02:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:14,967 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:02:14,967 INFO L226 Difference]: Without dead ends: 30 [2020-10-15 00:02:14,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-15 00:02:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-15 00:02:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 00:02:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-15 00:02:14,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-15 00:02:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:14,973 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-15 00:02:14,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:02:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-15 00:02:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:02:14,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:14,975 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:14,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:02:14,975 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2145925979, now seen corresponding path program 10 times [2020-10-15 00:02:14,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:14,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191333050] [2020-10-15 00:02:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:02:15,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:15,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-15 00:02:15,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:02:15,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:15,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:02:15,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:15,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:15,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:15,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:15,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:15,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:15,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:15,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:15,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191333050] [2020-10-15 00:02:15,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:15,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:15,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346803176] [2020-10-15 00:02:15,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:15,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:15,456 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-15 00:02:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:15,479 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-15 00:02:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:02:15,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-15 00:02:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:15,480 INFO L225 Difference]: With dead ends: 36 [2020-10-15 00:02:15,480 INFO L226 Difference]: Without dead ends: 31 [2020-10-15 00:02:15,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-15 00:02:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-15 00:02:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 00:02:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-15 00:02:15,485 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-15 00:02:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:15,486 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-15 00:02:15,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-15 00:02:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:02:15,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:15,487 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:15,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:02:15,487 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:15,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2134733669, now seen corresponding path program 11 times [2020-10-15 00:02:15,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:15,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007268742] [2020-10-15 00:02:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:15,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:02:15,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-15 00:02:15,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:02:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:02:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:15,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:15,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:15,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:15,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:15,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:15,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:15,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:15,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007268742] [2020-10-15 00:02:15,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:15,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:02:15,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096481007] [2020-10-15 00:02:15,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:02:15,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:02:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:15,844 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-15 00:02:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:15,867 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-15 00:02:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:02:15,868 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-15 00:02:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:15,868 INFO L225 Difference]: With dead ends: 37 [2020-10-15 00:02:15,868 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 00:02:15,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 00:02:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-15 00:02:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:02:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-15 00:02:15,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-15 00:02:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:15,874 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-15 00:02:15,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:02:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-15 00:02:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:02:15,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:15,875 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:15,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:02:15,875 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1787772059, now seen corresponding path program 12 times [2020-10-15 00:02:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:15,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339878669] [2020-10-15 00:02:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:02:16,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:16,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-15 00:02:16,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:02:16,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:02:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:16,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:16,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:16,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339878669] [2020-10-15 00:02:16,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:16,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:02:16,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391393267] [2020-10-15 00:02:16,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:02:16,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:02:16,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:16,360 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-10-15 00:02:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:16,393 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-15 00:02:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:02:16,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-15 00:02:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:16,395 INFO L225 Difference]: With dead ends: 38 [2020-10-15 00:02:16,395 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:02:16,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:02:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-15 00:02:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 00:02:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-15 00:02:16,400 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-15 00:02:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:16,400 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-15 00:02:16,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:02:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-15 00:02:16,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:02:16,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:16,401 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:16,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:02:16,402 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash -378103259, now seen corresponding path program 13 times [2020-10-15 00:02:16,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:16,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198621797] [2020-10-15 00:02:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:02:16,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:16,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:02:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:16,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:16,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:16,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:16,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:16,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:16,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:16,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198621797] [2020-10-15 00:02:16,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:16,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:02:16,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327106243] [2020-10-15 00:02:16,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:02:16,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:02:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:02:16,933 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-10-15 00:02:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:16,962 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-15 00:02:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:02:16,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-15 00:02:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:16,964 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:02:16,964 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:02:16,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:02:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:02:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-15 00:02:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 00:02:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-15 00:02:16,969 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-15 00:02:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:16,969 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-15 00:02:16,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:02:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-15 00:02:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:02:16,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:16,970 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:16,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:02:16,970 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1199238619, now seen corresponding path program 14 times [2020-10-15 00:02:16,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:16,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768432607] [2020-10-15 00:02:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:02:17,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-15 00:02:17,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:02:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:17,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:17,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:17,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:17,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:17,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:17,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:17,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:17,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768432607] [2020-10-15 00:02:17,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:17,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:02:17,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029553235] [2020-10-15 00:02:17,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:02:17,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:02:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:17,535 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-10-15 00:02:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:17,560 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-15 00:02:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:02:17,561 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-15 00:02:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:17,561 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:02:17,561 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:02:17,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:02:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-15 00:02:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:02:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-15 00:02:17,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-15 00:02:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:17,567 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-15 00:02:17,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:02:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-15 00:02:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:02:17,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:17,568 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:17,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:02:17,568 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1442770715, now seen corresponding path program 15 times [2020-10-15 00:02:17,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:17,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902986204] [2020-10-15 00:02:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:17,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:17,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:17,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:02:17,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-15 00:02:17,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:17,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:02:17,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:02:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:18,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902986204] [2020-10-15 00:02:18,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:02:18,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686784166] [2020-10-15 00:02:18,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:02:18,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:02:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:02:18,180 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 15 states. [2020-10-15 00:02:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:18,210 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-15 00:02:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:02:18,211 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-15 00:02:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:18,211 INFO L225 Difference]: With dead ends: 41 [2020-10-15 00:02:18,211 INFO L226 Difference]: Without dead ends: 36 [2020-10-15 00:02:18,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:02:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-15 00:02:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-15 00:02:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:02:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-15 00:02:18,216 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-15 00:02:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:18,216 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-15 00:02:18,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:02:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-15 00:02:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:02:18,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:18,217 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:18,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:02:18,217 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1740681445, now seen corresponding path program 16 times [2020-10-15 00:02:18,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:18,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863944051] [2020-10-15 00:02:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:02:18,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:18,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-15 00:02:18,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:02:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:02:18,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:18,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:18,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863944051] [2020-10-15 00:02:18,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:02:18,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836806854] [2020-10-15 00:02:18,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:02:18,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:02:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:18,997 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-10-15 00:02:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,031 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-15 00:02:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:02:19,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-15 00:02:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:19,032 INFO L225 Difference]: With dead ends: 42 [2020-10-15 00:02:19,033 INFO L226 Difference]: Without dead ends: 37 [2020-10-15 00:02:19,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-15 00:02:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-15 00:02:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:02:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-15 00:02:19,040 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-15 00:02:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:19,041 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-15 00:02:19,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:02:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-15 00:02:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:02:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:19,042 INFO L422 BasicCegarLoop]: trace histogram [14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:19,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:02:19,042 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:19,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1908987813, now seen corresponding path program 17 times [2020-10-15 00:02:19,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:19,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686249728] [2020-10-15 00:02:19,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:02:19,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:02:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:19,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:19,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:19,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:19,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:19,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:19,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:19,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:19,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686249728] [2020-10-15 00:02:19,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:19,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:02:19,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514821616] [2020-10-15 00:02:19,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:02:19,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:19,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:02:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:19,725 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-10-15 00:02:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,759 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-15 00:02:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:02:19,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-15 00:02:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:19,760 INFO L225 Difference]: With dead ends: 43 [2020-10-15 00:02:19,761 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 00:02:19,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 00:02:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-15 00:02:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 00:02:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-15 00:02:19,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-15 00:02:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:19,770 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-15 00:02:19,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:02:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-15 00:02:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:02:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:19,771 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:19,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:02:19,772 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -915382181, now seen corresponding path program 18 times [2020-10-15 00:02:19,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:19,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927228273] [2020-10-15 00:02:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:02:20,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:20,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:02:20,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:20,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:20,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:20,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927228273] [2020-10-15 00:02:20,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:20,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:02:20,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534418027] [2020-10-15 00:02:20,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:02:20,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:02:20,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:20,612 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 18 states. [2020-10-15 00:02:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:20,645 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-15 00:02:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:02:20,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-15 00:02:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:20,646 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:02:20,646 INFO L226 Difference]: Without dead ends: 39 [2020-10-15 00:02:20,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-15 00:02:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-15 00:02:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 00:02:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-15 00:02:20,651 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-15 00:02:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:20,651 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-15 00:02:20,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:02:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-15 00:02:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:02:20,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:20,652 INFO L422 BasicCegarLoop]: trace histogram [16, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:20,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:02:20,652 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1723461221, now seen corresponding path program 19 times [2020-10-15 00:02:20,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:20,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29843075] [2020-10-15 00:02:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:21,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:02:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:21,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:02:21,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:21,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:21,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:21,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:21,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:21,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:21,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:21,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:21,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29843075] [2020-10-15 00:02:21,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:21,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:02:21,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871933195] [2020-10-15 00:02:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:02:21,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:02:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:02:21,502 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 19 states. [2020-10-15 00:02:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:21,539 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-15 00:02:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:02:21,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-15 00:02:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:21,542 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:02:21,542 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:02:21,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:02:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:02:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-15 00:02:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:02:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-15 00:02:21,550 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-15 00:02:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:21,551 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-15 00:02:21,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:02:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-15 00:02:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:02:21,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:21,551 INFO L422 BasicCegarLoop]: trace histogram [17, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:21,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:02:21,552 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1923228059, now seen corresponding path program 20 times [2020-10-15 00:02:21,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:21,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518422352] [2020-10-15 00:02:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:22,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:02:22,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-15 00:02:22,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:22,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:02:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:02:22,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:22,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:22,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:22,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:22,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:22,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:22,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:22,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:22,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518422352] [2020-10-15 00:02:22,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:22,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:02:22,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200373398] [2020-10-15 00:02:22,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:02:22,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:02:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:22,556 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2020-10-15 00:02:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:22,594 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-15 00:02:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:02:22,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-15 00:02:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:22,596 INFO L225 Difference]: With dead ends: 46 [2020-10-15 00:02:22,596 INFO L226 Difference]: Without dead ends: 41 [2020-10-15 00:02:22,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-15 00:02:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-15 00:02:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:02:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-15 00:02:22,606 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-15 00:02:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:22,607 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-15 00:02:22,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:02:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-15 00:02:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:02:22,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:22,607 INFO L422 BasicCegarLoop]: trace histogram [18, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:22,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:02:22,608 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -473934555, now seen corresponding path program 21 times [2020-10-15 00:02:22,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:22,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344173956] [2020-10-15 00:02:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:22,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:23,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:02:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:23,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:02:23,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:23,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:23,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:23,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:23,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:23,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:23,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:23,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:23,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:23,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344173956] [2020-10-15 00:02:23,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:23,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:02:23,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667003145] [2020-10-15 00:02:23,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:02:23,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:02:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:23,422 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 21 states. [2020-10-15 00:02:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:23,466 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-15 00:02:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:02:23,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-15 00:02:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:23,467 INFO L225 Difference]: With dead ends: 47 [2020-10-15 00:02:23,467 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 00:02:23,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 00:02:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 00:02:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 00:02:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-15 00:02:23,473 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-15 00:02:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:23,474 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-15 00:02:23,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:02:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-15 00:02:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:02:23,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:23,474 INFO L422 BasicCegarLoop]: trace histogram [19, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:23,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:02:23,477 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:23,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1771531557, now seen corresponding path program 22 times [2020-10-15 00:02:23,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:23,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983069699] [2020-10-15 00:02:23,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:23,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:24,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:02:24,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:24,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:02:24,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:24,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:24,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:24,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:24,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:24,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:24,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:24,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:24,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:24,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983069699] [2020-10-15 00:02:24,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:24,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:02:24,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451454341] [2020-10-15 00:02:24,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:02:24,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:02:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:24,489 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 22 states. [2020-10-15 00:02:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:24,522 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-15 00:02:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:02:24,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-10-15 00:02:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:24,523 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:02:24,523 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 00:02:24,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 00:02:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-15 00:02:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 00:02:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-15 00:02:24,527 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-15 00:02:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:24,527 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-15 00:02:24,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:02:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-15 00:02:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:02:24,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:24,529 INFO L422 BasicCegarLoop]: trace histogram [20, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:24,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:02:24,529 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash 952634341, now seen corresponding path program 23 times [2020-10-15 00:02:24,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:24,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583040028] [2020-10-15 00:02:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:24,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:25,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:02:25,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:25,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-15 00:02:25,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:25,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:02:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:02:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:25,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:25,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:25,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:25,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:25,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:25,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:25,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583040028] [2020-10-15 00:02:25,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:25,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:02:25,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941697155] [2020-10-15 00:02:25,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:02:25,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:02:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:02:25,519 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 23 states. [2020-10-15 00:02:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:25,562 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-15 00:02:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:02:25,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-15 00:02:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:25,563 INFO L225 Difference]: With dead ends: 49 [2020-10-15 00:02:25,563 INFO L226 Difference]: Without dead ends: 44 [2020-10-15 00:02:25,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:02:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-15 00:02:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-15 00:02:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:02:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-15 00:02:25,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-15 00:02:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:25,573 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-15 00:02:25,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:02:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-15 00:02:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:02:25,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:25,574 INFO L422 BasicCegarLoop]: trace histogram [21, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:25,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:02:25,574 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -497568741, now seen corresponding path program 24 times [2020-10-15 00:02:25,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:25,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337760189] [2020-10-15 00:02:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:25,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:26,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:26,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:02:26,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:26,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-15 00:02:26,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:26,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:02:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:26,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:02:26,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:27,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:27,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:27,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:27,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:27,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:27,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:27,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:27,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337760189] [2020-10-15 00:02:27,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:27,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:02:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080243150] [2020-10-15 00:02:27,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:02:27,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:02:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:02:27,077 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 24 states. [2020-10-15 00:02:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:27,114 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-15 00:02:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:02:27,115 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-15 00:02:27,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:27,116 INFO L225 Difference]: With dead ends: 50 [2020-10-15 00:02:27,116 INFO L226 Difference]: Without dead ends: 45 [2020-10-15 00:02:27,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:02:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-15 00:02:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-15 00:02:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 00:02:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-15 00:02:27,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-15 00:02:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:27,121 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-15 00:02:27,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:02:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-15 00:02:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:02:27,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:27,122 INFO L422 BasicCegarLoop]: trace histogram [22, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:27,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:02:27,122 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1790775973, now seen corresponding path program 25 times [2020-10-15 00:02:27,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:27,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043977888] [2020-10-15 00:02:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:27,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:27,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:02:27,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:27,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-15 00:02:27,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:27,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:02:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:02:27,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:28,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:28,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:28,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:28,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:28,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:28,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:28,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:28,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043977888] [2020-10-15 00:02:28,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:28,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:02:28,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856340061] [2020-10-15 00:02:28,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:02:28,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:02:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:02:28,093 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 25 states. [2020-10-15 00:02:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:28,141 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-15 00:02:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:02:28,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-10-15 00:02:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:28,142 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:02:28,143 INFO L226 Difference]: Without dead ends: 46 [2020-10-15 00:02:28,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:02:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-15 00:02:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-15 00:02:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:02:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-15 00:02:28,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-15 00:02:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:28,149 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-15 00:02:28,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:02:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-15 00:02:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:02:28,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:28,151 INFO L422 BasicCegarLoop]: trace histogram [23, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:28,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:02:28,151 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -284981925, now seen corresponding path program 26 times [2020-10-15 00:02:28,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:28,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230929491] [2020-10-15 00:02:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:02:29,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:29,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-15 00:02:29,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:02:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:29,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:02:29,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:29,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:29,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230929491] [2020-10-15 00:02:29,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:29,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:02:29,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959953066] [2020-10-15 00:02:29,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:02:29,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:02:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:02:29,444 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 26 states. [2020-10-15 00:02:29,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:29,485 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-15 00:02:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:02:29,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-15 00:02:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:29,487 INFO L225 Difference]: With dead ends: 52 [2020-10-15 00:02:29,487 INFO L226 Difference]: Without dead ends: 47 [2020-10-15 00:02:29,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:02:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-15 00:02:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-15 00:02:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:02:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-15 00:02:29,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-15 00:02:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:29,492 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-15 00:02:29,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:02:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-15 00:02:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 00:02:29,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:29,493 INFO L422 BasicCegarLoop]: trace histogram [24, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:29,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:02:29,493 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:29,493 INFO L82 PathProgramCache]: Analyzing trace with hash -208967323, now seen corresponding path program 27 times [2020-10-15 00:02:29,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:29,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008097464] [2020-10-15 00:02:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:02:30,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:30,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 665 [2020-10-15 00:02:30,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:30,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:30,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:02:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:30,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:02:30,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:30,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:30,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:30,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:30,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:30,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:30,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008097464] [2020-10-15 00:02:30,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:30,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:02:30,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495825652] [2020-10-15 00:02:30,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:02:30,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:02:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:02:30,601 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 27 states. [2020-10-15 00:02:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:30,647 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-15 00:02:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:02:30,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-15 00:02:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:30,648 INFO L225 Difference]: With dead ends: 53 [2020-10-15 00:02:30,648 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 00:02:30,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:02:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 00:02:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-15 00:02:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 00:02:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-15 00:02:30,653 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-15 00:02:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:30,653 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-15 00:02:30,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:02:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-15 00:02:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:02:30,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:30,656 INFO L422 BasicCegarLoop]: trace histogram [25, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:30,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:02:30,657 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2147481957, now seen corresponding path program 28 times [2020-10-15 00:02:30,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:30,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748895968] [2020-10-15 00:02:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:30,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:31,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:31,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:02:31,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-15 00:02:31,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:31,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:31,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:02:31,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:31,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:02:31,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:32,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:32,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:32,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:32,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:32,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:32,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:32,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:32,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:32,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:32,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:32,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:32,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748895968] [2020-10-15 00:02:32,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:32,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:02:32,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919279777] [2020-10-15 00:02:32,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:02:32,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:02:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:02:32,172 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 28 states. [2020-10-15 00:02:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:32,236 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-15 00:02:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:02:32,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-10-15 00:02:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:32,237 INFO L225 Difference]: With dead ends: 54 [2020-10-15 00:02:32,238 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 00:02:32,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:02:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 00:02:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-15 00:02:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 00:02:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-15 00:02:32,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-15 00:02:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:32,245 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-15 00:02:32,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:02:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-15 00:02:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:02:32,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:32,252 INFO L422 BasicCegarLoop]: trace histogram [26, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:32,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:02:32,253 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2111893467, now seen corresponding path program 29 times [2020-10-15 00:02:32,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:32,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139108902] [2020-10-15 00:02:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:32,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:33,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:02:33,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-15 00:02:33,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:33,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:02:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:02:33,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:33,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:33,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:33,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:33,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:33,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:33,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139108902] [2020-10-15 00:02:33,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:33,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:02:33,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006398992] [2020-10-15 00:02:33,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:02:33,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:02:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:02:33,510 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2020-10-15 00:02:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:33,563 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-15 00:02:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:02:33,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 47 [2020-10-15 00:02:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:33,566 INFO L225 Difference]: With dead ends: 55 [2020-10-15 00:02:33,566 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 00:02:33,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:02:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 00:02:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-15 00:02:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:02:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-15 00:02:33,572 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-15 00:02:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:33,573 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-15 00:02:33,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:02:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-15 00:02:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:02:33,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:33,575 INFO L422 BasicCegarLoop]: trace histogram [27, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:33,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:02:33,575 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1008650277, now seen corresponding path program 30 times [2020-10-15 00:02:33,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:33,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986368067] [2020-10-15 00:02:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:33,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:34,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 915 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:02:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:35,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:35,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:35,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:35,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:35,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986368067] [2020-10-15 00:02:35,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:35,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:02:35,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308397365] [2020-10-15 00:02:35,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:02:35,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:35,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:02:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:02:35,030 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 30 states. [2020-10-15 00:02:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:35,101 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-15 00:02:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:02:35,102 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-10-15 00:02:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:35,103 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:02:35,103 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 00:02:35,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:02:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 00:02:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-15 00:02:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:02:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-15 00:02:35,109 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-15 00:02:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:35,110 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-15 00:02:35,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:02:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-15 00:02:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:02:35,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:35,111 INFO L422 BasicCegarLoop]: trace histogram [28, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:35,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:02:35,111 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1167849755, now seen corresponding path program 31 times [2020-10-15 00:02:35,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:35,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887563067] [2020-10-15 00:02:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:35,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:35,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:35,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:02:35,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:35,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-15 00:02:35,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:36,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:36,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:36,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:36,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:36,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:36,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887563067] [2020-10-15 00:02:36,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:36,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:02:36,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55293755] [2020-10-15 00:02:36,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:02:36,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:02:36,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:02:36,484 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 31 states. [2020-10-15 00:02:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:36,553 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-15 00:02:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:02:36,554 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 49 [2020-10-15 00:02:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:36,555 INFO L225 Difference]: With dead ends: 57 [2020-10-15 00:02:36,555 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:02:36,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:02:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:02:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-15 00:02:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 00:02:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-15 00:02:36,563 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-15 00:02:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:36,564 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-15 00:02:36,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:02:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-15 00:02:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:02:36,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:36,565 INFO L422 BasicCegarLoop]: trace histogram [29, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:36,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:02:36,566 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066277, now seen corresponding path program 32 times [2020-10-15 00:02:36,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:36,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696152428] [2020-10-15 00:02:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:37,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:37,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:02:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:37,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:02:37,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:38,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:38,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:38,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:38,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:38,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:38,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:38,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696152428] [2020-10-15 00:02:38,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:38,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:02:38,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808974068] [2020-10-15 00:02:38,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:02:38,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:02:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:02:38,052 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 32 states. [2020-10-15 00:02:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:38,120 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-15 00:02:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:02:38,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-10-15 00:02:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:38,121 INFO L225 Difference]: With dead ends: 58 [2020-10-15 00:02:38,121 INFO L226 Difference]: Without dead ends: 53 [2020-10-15 00:02:38,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:02:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-15 00:02:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-15 00:02:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:02:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-15 00:02:38,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-15 00:02:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:38,125 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-15 00:02:38,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:02:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-15 00:02:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 00:02:38,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:38,126 INFO L422 BasicCegarLoop]: trace histogram [30, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:38,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:02:38,126 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -179941979, now seen corresponding path program 33 times [2020-10-15 00:02:38,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:38,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054901263] [2020-10-15 00:02:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:38,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:38,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:02:38,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:38,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:02:38,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:39,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:39,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:39,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:39,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:39,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:39,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:39,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:39,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:39,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054901263] [2020-10-15 00:02:39,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:39,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:02:39,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745704444] [2020-10-15 00:02:39,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:02:39,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:39,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:02:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:02:39,496 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 33 states. [2020-10-15 00:02:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:39,561 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-15 00:02:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:02:39,562 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 51 [2020-10-15 00:02:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:39,562 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:02:39,563 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:02:39,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:02:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:02:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-15 00:02:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 00:02:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-15 00:02:39,566 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-15 00:02:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:39,566 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-15 00:02:39,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:02:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-15 00:02:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:02:39,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:39,567 INFO L422 BasicCegarLoop]: trace histogram [31, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:39,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:02:39,567 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:39,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1247696293, now seen corresponding path program 34 times [2020-10-15 00:02:39,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:39,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807611911] [2020-10-15 00:02:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:39,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:39,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:40,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:40,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:02:40,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:40,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1281 [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:02:40,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:41,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:41,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:41,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:41,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:41,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:41,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807611911] [2020-10-15 00:02:41,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:41,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:02:41,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860062645] [2020-10-15 00:02:41,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:02:41,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:02:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:02:41,510 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 34 states. [2020-10-15 00:02:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:41,573 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-15 00:02:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:02:41,574 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-15 00:02:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:41,574 INFO L225 Difference]: With dead ends: 60 [2020-10-15 00:02:41,575 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 00:02:41,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:02:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 00:02:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-15 00:02:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:02:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-15 00:02:41,579 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-15 00:02:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:41,579 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-15 00:02:41,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:02:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-15 00:02:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:02:41,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:41,580 INFO L422 BasicCegarLoop]: trace histogram [32, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:41,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:02:41,580 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:41,581 INFO L82 PathProgramCache]: Analyzing trace with hash 11658341, now seen corresponding path program 35 times [2020-10-15 00:02:41,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:41,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075958369] [2020-10-15 00:02:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:42,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:02:42,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:43,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:43,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:43,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:43,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:43,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:43,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:43,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075958369] [2020-10-15 00:02:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:02:43,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733982516] [2020-10-15 00:02:43,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:02:43,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:02:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:02:43,012 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 35 states. [2020-10-15 00:02:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:43,063 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-15 00:02:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:02:43,064 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2020-10-15 00:02:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:43,064 INFO L225 Difference]: With dead ends: 61 [2020-10-15 00:02:43,064 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 00:02:43,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:02:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 00:02:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-15 00:02:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 00:02:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-15 00:02:43,069 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-15 00:02:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:43,070 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-15 00:02:43,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:02:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-15 00:02:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:02:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:43,071 INFO L422 BasicCegarLoop]: trace histogram [33, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:43,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:02:43,071 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 396946331, now seen corresponding path program 36 times [2020-10-15 00:02:43,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:43,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083071745] [2020-10-15 00:02:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:43,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:02:44,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:02:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:44,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:44,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083071745] [2020-10-15 00:02:44,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:44,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:02:44,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437940877] [2020-10-15 00:02:44,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:02:44,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:44,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:02:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:02:44,846 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 36 states. [2020-10-15 00:02:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:44,915 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-15 00:02:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:02:44,916 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 54 [2020-10-15 00:02:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:44,917 INFO L225 Difference]: With dead ends: 62 [2020-10-15 00:02:44,917 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:02:44,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:02:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:02:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-15 00:02:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:02:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-15 00:02:44,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-15 00:02:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:44,921 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-15 00:02:44,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:02:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-15 00:02:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:02:44,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:44,921 INFO L422 BasicCegarLoop]: trace histogram [34, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:44,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:02:44,922 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:44,922 INFO L82 PathProgramCache]: Analyzing trace with hash -544027867, now seen corresponding path program 37 times [2020-10-15 00:02:44,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:44,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64618834] [2020-10-15 00:02:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:44,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:45,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:02:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:02:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:46,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:46,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:46,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:46,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:46,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:46,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:46,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:46,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:46,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:46,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64618834] [2020-10-15 00:02:46,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:46,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:02:46,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734091067] [2020-10-15 00:02:46,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:02:46,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:02:46,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:02:46,643 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 37 states. [2020-10-15 00:02:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:46,722 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-15 00:02:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:02:46,724 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 55 [2020-10-15 00:02:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:46,724 INFO L225 Difference]: With dead ends: 63 [2020-10-15 00:02:46,724 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:02:46,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:02:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:02:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-15 00:02:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:02:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-15 00:02:46,728 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-15 00:02:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:46,728 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-15 00:02:46,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:02:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-15 00:02:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:02:46,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:46,729 INFO L422 BasicCegarLoop]: trace histogram [35, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:46,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:02:46,729 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash 350543067, now seen corresponding path program 38 times [2020-10-15 00:02:46,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:46,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92983785] [2020-10-15 00:02:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:46,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:46,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:48,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:02:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:49,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:49,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:49,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:49,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92983785] [2020-10-15 00:02:49,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:49,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:02:49,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99388810] [2020-10-15 00:02:49,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:02:49,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:02:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:02:49,037 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 38 states. [2020-10-15 00:02:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:49,108 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-15 00:02:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:02:49,109 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 56 [2020-10-15 00:02:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:49,109 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:02:49,109 INFO L226 Difference]: Without dead ends: 59 [2020-10-15 00:02:49,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:02:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-15 00:02:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-15 00:02:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:02:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-15 00:02:49,113 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-15 00:02:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:49,113 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-15 00:02:49,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:02:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-15 00:02:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 00:02:49,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:49,114 INFO L422 BasicCegarLoop]: trace histogram [36, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:49,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:02:49,115 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1982529051, now seen corresponding path program 39 times [2020-10-15 00:02:49,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:49,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573537750] [2020-10-15 00:02:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:50,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:02:50,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:50,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:02:50,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:51,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:51,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:51,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:51,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573537750] [2020-10-15 00:02:51,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:51,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:02:51,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399933981] [2020-10-15 00:02:51,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:02:51,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:02:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:02:51,141 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 39 states. [2020-10-15 00:02:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:51,222 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-15 00:02:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:02:51,222 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 57 [2020-10-15 00:02:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:51,223 INFO L225 Difference]: With dead ends: 65 [2020-10-15 00:02:51,223 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 00:02:51,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:02:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 00:02:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-15 00:02:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 00:02:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-15 00:02:51,226 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-15 00:02:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:51,227 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-15 00:02:51,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:02:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-15 00:02:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:02:51,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:51,227 INFO L422 BasicCegarLoop]: trace histogram [37, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:51,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:02:51,228 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1293320677, now seen corresponding path program 40 times [2020-10-15 00:02:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:51,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809700818] [2020-10-15 00:02:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:02:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:53,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:53,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:53,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809700818] [2020-10-15 00:02:53,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:02:53,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939908505] [2020-10-15 00:02:53,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:02:53,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:02:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:53,422 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 40 states. [2020-10-15 00:02:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,502 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-15 00:02:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:02:53,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 58 [2020-10-15 00:02:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,504 INFO L225 Difference]: With dead ends: 66 [2020-10-15 00:02:53,504 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 00:02:53,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:02:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 00:02:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-15 00:02:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:02:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-15 00:02:53,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-15 00:02:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,511 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-15 00:02:53,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:02:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-15 00:02:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 00:02:53,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,512 INFO L422 BasicCegarLoop]: trace histogram [38, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:02:53,512 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1402697563, now seen corresponding path program 41 times [2020-10-15 00:02:53,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104979675] [2020-10-15 00:02:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 00:02:54,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:55,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:55,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:55,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104979675] [2020-10-15 00:02:55,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:55,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:02:55,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250986828] [2020-10-15 00:02:55,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:02:55,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:02:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:02:55,683 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 41 states. [2020-10-15 00:02:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:55,765 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-15 00:02:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:02:55,767 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 59 [2020-10-15 00:02:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:55,768 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:02:55,768 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:02:55,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:02:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:02:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-15 00:02:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 00:02:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-15 00:02:55,772 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-15 00:02:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:55,772 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-15 00:02:55,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:02:55,772 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-15 00:02:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:02:55,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:55,773 INFO L422 BasicCegarLoop]: trace histogram [39, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:55,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:02:55,773 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:55,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash -498413733, now seen corresponding path program 42 times [2020-10-15 00:02:55,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:55,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88145124] [2020-10-15 00:02:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:57,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:02:57,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:57,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:02:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:58,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:58,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:58,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:02:58,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88145124] [2020-10-15 00:02:58,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:58,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:02:58,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978195970] [2020-10-15 00:02:58,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:02:58,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:02:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:58,265 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 42 states. [2020-10-15 00:02:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:58,363 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-15 00:02:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:02:58,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-10-15 00:02:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:58,364 INFO L225 Difference]: With dead ends: 68 [2020-10-15 00:02:58,364 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 00:02:58,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:02:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 00:02:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-15 00:02:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:02:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-15 00:02:58,368 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-15 00:02:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:58,368 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-15 00:02:58,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:02:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-15 00:02:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-15 00:02:58,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:58,369 INFO L422 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:58,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:02:58,369 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1764581221, now seen corresponding path program 43 times [2020-10-15 00:02:58,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:58,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139712332] [2020-10-15 00:02:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:59,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-15 00:02:59,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:02:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:00,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:00,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:00,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:00,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139712332] [2020-10-15 00:03:00,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:00,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:03:00,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987753044] [2020-10-15 00:03:00,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:03:00,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:00,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:03:00,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:03:00,805 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 43 states. [2020-10-15 00:03:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:00,865 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-15 00:03:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:03:00,865 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 61 [2020-10-15 00:03:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:00,866 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:03:00,866 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:03:00,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:03:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:03:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-15 00:03:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 00:03:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-15 00:03:00,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-15 00:03:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:00,870 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-15 00:03:00,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:03:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-15 00:03:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:03:00,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:00,871 INFO L422 BasicCegarLoop]: trace histogram [41, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:00,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:03:00,871 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1097019237, now seen corresponding path program 44 times [2020-10-15 00:03:00,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:00,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450127542] [2020-10-15 00:03:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:02,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:03:02,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:02,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-15 00:03:02,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:02,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:03:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:02,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:03:02,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:03,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:03,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450127542] [2020-10-15 00:03:03,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:03,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:03:03,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44586455] [2020-10-15 00:03:03,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:03:03,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:03,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:03:03,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:03:03,374 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 44 states. [2020-10-15 00:03:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:03,447 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-15 00:03:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:03:03,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 62 [2020-10-15 00:03:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:03,448 INFO L225 Difference]: With dead ends: 70 [2020-10-15 00:03:03,448 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 00:03:03,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:03:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 00:03:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-15 00:03:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:03:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-15 00:03:03,453 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-15 00:03:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:03,453 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-15 00:03:03,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:03:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-15 00:03:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-15 00:03:03,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:03,454 INFO L422 BasicCegarLoop]: trace histogram [42, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:03,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:03:03,454 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:03,455 INFO L82 PathProgramCache]: Analyzing trace with hash 387679781, now seen corresponding path program 45 times [2020-10-15 00:03:03,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:03,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573821762] [2020-10-15 00:03:03,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:04,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 00:03:04,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:04,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1031 [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 00:03:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:05,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:05,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:05,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:05,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573821762] [2020-10-15 00:03:05,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:05,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:03:05,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450232417] [2020-10-15 00:03:05,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:03:05,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:05,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:03:05,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:03:05,690 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 45 states. [2020-10-15 00:03:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:05,776 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-15 00:03:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:03:05,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 63 [2020-10-15 00:03:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:05,778 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:03:05,778 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:03:05,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:03:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:03:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-15 00:03:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 00:03:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-15 00:03:05,782 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-15 00:03:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:05,782 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-15 00:03:05,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:03:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-15 00:03:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:03:05,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:05,783 INFO L422 BasicCegarLoop]: trace histogram [43, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:05,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:03:05,783 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash -831290917, now seen corresponding path program 46 times [2020-10-15 00:03:05,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:05,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460040582] [2020-10-15 00:03:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:05,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:06,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:03:06,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:06,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:03:06,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:08,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:08,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:08,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460040582] [2020-10-15 00:03:08,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:08,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:03:08,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423513056] [2020-10-15 00:03:08,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:03:08,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:03:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:03:08,174 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 46 states. [2020-10-15 00:03:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:08,269 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-15 00:03:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:03:08,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2020-10-15 00:03:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:08,271 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:03:08,271 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 00:03:08,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:03:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 00:03:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-15 00:03:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:03:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-15 00:03:08,278 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-15 00:03:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:08,279 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-15 00:03:08,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:03:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-15 00:03:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 00:03:08,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:08,280 INFO L422 BasicCegarLoop]: trace histogram [44, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:08,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:03:08,280 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash 35323109, now seen corresponding path program 47 times [2020-10-15 00:03:08,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:08,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231638072] [2020-10-15 00:03:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:09,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:09,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1128 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:09,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 00:03:09,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:10,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:10,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:10,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:10,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:10,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231638072] [2020-10-15 00:03:10,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:10,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:03:10,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236021431] [2020-10-15 00:03:10,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:03:10,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:10,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:03:10,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:03:10,732 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 47 states. [2020-10-15 00:03:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:10,801 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-15 00:03:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:03:10,802 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 65 [2020-10-15 00:03:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:10,803 INFO L225 Difference]: With dead ends: 73 [2020-10-15 00:03:10,803 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 00:03:10,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:03:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 00:03:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-15 00:03:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 00:03:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-15 00:03:10,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-15 00:03:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:10,811 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-15 00:03:10,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:03:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-15 00:03:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:03:10,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:10,813 INFO L422 BasicCegarLoop]: trace histogram [45, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:10,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:03:10,814 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1130554139, now seen corresponding path program 48 times [2020-10-15 00:03:10,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:10,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941154753] [2020-10-15 00:03:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:12,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:03:12,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:12,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-15 00:03:12,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:12,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:12,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:03:12,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:12,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:03:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:13,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:13,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:13,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:13,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941154753] [2020-10-15 00:03:13,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:13,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:03:13,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872023712] [2020-10-15 00:03:13,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:03:13,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:13,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:03:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:03:13,798 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 48 states. [2020-10-15 00:03:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:13,889 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-15 00:03:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:03:13,889 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2020-10-15 00:03:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:13,890 INFO L225 Difference]: With dead ends: 74 [2020-10-15 00:03:13,891 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:03:13,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:03:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:03:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-15 00:03:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:03:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-15 00:03:13,895 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-15 00:03:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:13,895 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-15 00:03:13,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:03:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-15 00:03:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 00:03:13,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:13,896 INFO L422 BasicCegarLoop]: trace histogram [46, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:13,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:03:13,896 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash 722977701, now seen corresponding path program 49 times [2020-10-15 00:03:13,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:13,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738370563] [2020-10-15 00:03:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:13,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:13,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:15,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1295 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:03:15,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:15,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:03:15,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:16,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:16,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:16,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:16,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:16,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:16,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:16,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:16,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:16,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738370563] [2020-10-15 00:03:16,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:16,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:03:16,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740424394] [2020-10-15 00:03:16,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:03:16,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:03:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:03:16,641 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 49 states. [2020-10-15 00:03:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:16,741 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-15 00:03:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:03:16,741 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 67 [2020-10-15 00:03:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:16,742 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:03:16,742 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:03:16,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:03:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:03:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 00:03:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 00:03:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-15 00:03:16,746 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-15 00:03:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:16,746 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-15 00:03:16,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:03:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-15 00:03:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:03:16,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:16,747 INFO L422 BasicCegarLoop]: trace histogram [47, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:16,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:03:16,747 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 973010011, now seen corresponding path program 50 times [2020-10-15 00:03:16,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:16,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816891912] [2020-10-15 00:03:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:18,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:18,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:03:18,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:03:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:19,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816891912] [2020-10-15 00:03:19,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:19,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:03:19,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113321387] [2020-10-15 00:03:19,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:03:19,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:03:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:03:19,798 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 50 states. [2020-10-15 00:03:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:19,880 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-15 00:03:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:03:19,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 68 [2020-10-15 00:03:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:19,881 INFO L225 Difference]: With dead ends: 76 [2020-10-15 00:03:19,881 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:03:19,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:03:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:03:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-15 00:03:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:03:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-15 00:03:19,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-15 00:03:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:19,885 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-15 00:03:19,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:03:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-15 00:03:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 00:03:19,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:19,886 INFO L422 BasicCegarLoop]: trace histogram [48, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:19,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:03:19,886 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 134077029, now seen corresponding path program 51 times [2020-10-15 00:03:19,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:19,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936013818] [2020-10-15 00:03:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:21,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:21,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 00:03:21,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:21,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-15 00:03:21,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:21,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:03:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-15 00:03:21,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:22,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:22,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:22,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:22,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:22,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:22,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936013818] [2020-10-15 00:03:22,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:22,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:03:22,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521338457] [2020-10-15 00:03:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:03:22,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:03:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:03:22,891 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 51 states. [2020-10-15 00:03:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:22,995 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-15 00:03:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:03:22,995 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 69 [2020-10-15 00:03:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:22,996 INFO L225 Difference]: With dead ends: 77 [2020-10-15 00:03:22,996 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 00:03:22,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:03:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 00:03:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-15 00:03:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 00:03:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-15 00:03:23,001 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-15 00:03:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:23,002 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-15 00:03:23,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:03:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-15 00:03:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:03:23,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:23,005 INFO L422 BasicCegarLoop]: trace histogram [49, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:23,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:03:23,005 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -103041637, now seen corresponding path program 52 times [2020-10-15 00:03:23,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:23,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777444700] [2020-10-15 00:03:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:23,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:25,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:25,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:03:25,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:25,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2028 [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:03:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:26,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:26,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:26,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:26,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777444700] [2020-10-15 00:03:26,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:26,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:03:26,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349394195] [2020-10-15 00:03:26,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:03:26,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:03:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:26,714 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 52 states. [2020-10-15 00:03:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:26,813 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-15 00:03:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:03:26,814 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 70 [2020-10-15 00:03:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:26,815 INFO L225 Difference]: With dead ends: 78 [2020-10-15 00:03:26,815 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:03:26,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:03:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-15 00:03:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:03:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-15 00:03:26,818 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-15 00:03:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:26,819 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-15 00:03:26,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:03:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-15 00:03:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 00:03:26,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:26,819 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:26,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:03:26,820 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1136214309, now seen corresponding path program 53 times [2020-10-15 00:03:26,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:26,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809402080] [2020-10-15 00:03:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:28,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1571 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:28,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-15 00:03:28,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:30,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:30,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:30,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:30,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:30,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809402080] [2020-10-15 00:03:30,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:30,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:03:30,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074322862] [2020-10-15 00:03:30,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:03:30,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:30,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:03:30,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:30,166 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 53 states. [2020-10-15 00:03:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:30,243 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-15 00:03:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:03:30,243 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 71 [2020-10-15 00:03:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:30,244 INFO L225 Difference]: With dead ends: 79 [2020-10-15 00:03:30,244 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 00:03:30,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 00:03:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-15 00:03:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 00:03:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-15 00:03:30,248 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-15 00:03:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:30,248 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-15 00:03:30,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:03:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-15 00:03:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:03:30,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:30,249 INFO L422 BasicCegarLoop]: trace histogram [51, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:30,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:03:30,249 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:30,249 INFO L82 PathProgramCache]: Analyzing trace with hash 898442971, now seen corresponding path program 54 times [2020-10-15 00:03:30,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:30,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389953055] [2020-10-15 00:03:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:30,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:30,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:32,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:03:32,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:03:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:33,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:33,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:33,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:33,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:33,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389953055] [2020-10-15 00:03:33,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:33,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:03:33,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791361402] [2020-10-15 00:03:33,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:03:33,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:03:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:33,893 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 54 states. [2020-10-15 00:03:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:34,000 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-15 00:03:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:03:34,001 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 72 [2020-10-15 00:03:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:34,001 INFO L225 Difference]: With dead ends: 80 [2020-10-15 00:03:34,001 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:03:34,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:03:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-15 00:03:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:03:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-15 00:03:34,005 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-15 00:03:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:34,005 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-15 00:03:34,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:03:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-15 00:03:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 00:03:34,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:34,006 INFO L422 BasicCegarLoop]: trace histogram [52, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:34,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:03:34,006 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2117466085, now seen corresponding path program 55 times [2020-10-15 00:03:34,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:34,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476220031] [2020-10-15 00:03:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:34,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:34,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:35,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:35,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 00:03:35,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:35,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-15 00:03:35,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:35,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:03:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 00:03:35,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:37,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:37,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:37,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:37,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:37,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476220031] [2020-10-15 00:03:37,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:37,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:03:37,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140624877] [2020-10-15 00:03:37,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:03:37,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:03:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:03:37,621 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 55 states. [2020-10-15 00:03:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:37,728 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-15 00:03:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:03:37,728 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 73 [2020-10-15 00:03:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:37,729 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:03:37,729 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:03:37,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:03:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:03:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-15 00:03:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 00:03:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-15 00:03:37,732 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-10-15 00:03:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:37,732 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-15 00:03:37,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:03:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-15 00:03:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:03:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:37,733 INFO L422 BasicCegarLoop]: trace histogram [53, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:37,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:03:37,733 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1252476955, now seen corresponding path program 56 times [2020-10-15 00:03:37,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:37,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447723331] [2020-10-15 00:03:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2179 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:03:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:03:39,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:41,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:41,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:41,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:41,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447723331] [2020-10-15 00:03:41,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:41,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:03:41,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623010733] [2020-10-15 00:03:41,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:03:41,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:03:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:41,895 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 56 states. [2020-10-15 00:03:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:42,000 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-15 00:03:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:03:42,001 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2020-10-15 00:03:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:42,002 INFO L225 Difference]: With dead ends: 82 [2020-10-15 00:03:42,002 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 00:03:42,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:03:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 00:03:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-15 00:03:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:03:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-15 00:03:42,007 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-15 00:03:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:42,008 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-15 00:03:42,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:03:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-15 00:03:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 00:03:42,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:42,009 INFO L422 BasicCegarLoop]: trace histogram [54, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:42,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:03:42,009 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 207617701, now seen corresponding path program 57 times [2020-10-15 00:03:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:42,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040566478] [2020-10-15 00:03:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:42,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:43,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:43,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-15 00:03:43,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:45,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:45,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:45,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:45,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:45,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040566478] [2020-10-15 00:03:45,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:45,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:03:45,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070403459] [2020-10-15 00:03:45,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:03:45,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:03:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:45,965 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 57 states. [2020-10-15 00:03:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:46,071 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-15 00:03:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:03:46,072 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 75 [2020-10-15 00:03:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:46,073 INFO L225 Difference]: With dead ends: 83 [2020-10-15 00:03:46,073 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 00:03:46,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 00:03:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-15 00:03:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 00:03:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-15 00:03:46,077 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-10-15 00:03:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:46,077 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-15 00:03:46,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:03:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-15 00:03:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:03:46,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:46,078 INFO L422 BasicCegarLoop]: trace histogram [55, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:46,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:03:46,079 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2118248101, now seen corresponding path program 58 times [2020-10-15 00:03:46,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:46,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207480690] [2020-10-15 00:03:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:47,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:48,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:03:48,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:48,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:03:48,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:50,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:50,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:50,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:50,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207480690] [2020-10-15 00:03:50,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:50,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:03:50,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022567995] [2020-10-15 00:03:50,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:03:50,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:50,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:03:50,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:50,608 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 58 states. [2020-10-15 00:03:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:50,724 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-15 00:03:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:03:50,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-10-15 00:03:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:50,726 INFO L225 Difference]: With dead ends: 84 [2020-10-15 00:03:50,726 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 00:03:50,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 00:03:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-15 00:03:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:03:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-15 00:03:50,728 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-15 00:03:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:50,728 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-15 00:03:50,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:03:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-15 00:03:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 00:03:50,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:50,729 INFO L422 BasicCegarLoop]: trace histogram [56, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:50,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-15 00:03:50,729 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1205643931, now seen corresponding path program 59 times [2020-10-15 00:03:50,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:50,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163981344] [2020-10-15 00:03:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-15 00:03:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2069 [2020-10-15 00:03:52,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:52,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:03:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-15 00:03:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:55,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:55,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:55,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:03:55,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163981344] [2020-10-15 00:03:55,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:55,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:03:55,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407026576] [2020-10-15 00:03:55,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:03:55,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:03:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:03:55,025 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 59 states. [2020-10-15 00:03:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:55,152 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-15 00:03:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:03:55,152 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 77 [2020-10-15 00:03:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:55,153 INFO L225 Difference]: With dead ends: 85 [2020-10-15 00:03:55,153 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 00:03:55,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:03:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 00:03:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-15 00:03:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:03:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-15 00:03:55,156 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-10-15 00:03:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:55,156 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-15 00:03:55,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:03:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-15 00:03:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:03:55,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:55,157 INFO L422 BasicCegarLoop]: trace histogram [57, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:55,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-15 00:03:55,158 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1315281563, now seen corresponding path program 60 times [2020-10-15 00:03:55,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:55,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998463002] [2020-10-15 00:03:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:55,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:57,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:57,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:57,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:03:57,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:03:57,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2773 [2020-10-15 00:03:57,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:57,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:03:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:57,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:03:57,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:00,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:00,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:00,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:00,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:00,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:00,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:00,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:00,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:00,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:00,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:00,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:00,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:00,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998463002] [2020-10-15 00:04:00,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:00,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:04:00,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400368434] [2020-10-15 00:04:00,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:04:00,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:04:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:00,246 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 60 states. [2020-10-15 00:04:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:00,378 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-15 00:04:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:04:00,379 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-10-15 00:04:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:00,380 INFO L225 Difference]: With dead ends: 86 [2020-10-15 00:04:00,380 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:04:00,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:04:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-15 00:04:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:04:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-15 00:04:00,383 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-15 00:04:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:00,384 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-15 00:04:00,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:04:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-15 00:04:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-15 00:04:00,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:00,385 INFO L422 BasicCegarLoop]: trace histogram [58, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:00,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-15 00:04:00,385 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2140406747, now seen corresponding path program 61 times [2020-10-15 00:04:00,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:00,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57610223] [2020-10-15 00:04:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:00,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:02,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:02,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 00:04:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:05,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:05,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:05,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:05,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57610223] [2020-10-15 00:04:05,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:05,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-15 00:04:05,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657372925] [2020-10-15 00:04:05,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-15 00:04:05,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-15 00:04:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:05,237 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 61 states. [2020-10-15 00:04:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:05,366 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-15 00:04:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-15 00:04:05,367 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 79 [2020-10-15 00:04:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:05,367 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:04:05,367 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:04:05,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:04:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-15 00:04:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 00:04:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-15 00:04:05,371 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-10-15 00:04:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:05,371 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-15 00:04:05,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-15 00:04:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-15 00:04:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:04:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:05,372 INFO L422 BasicCegarLoop]: trace histogram [59, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:05,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-15 00:04:05,373 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1892561957, now seen corresponding path program 62 times [2020-10-15 00:04:05,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:05,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285064092] [2020-10-15 00:04:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:05,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:08,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:08,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:04:08,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2985 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:04:08,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:10,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:10,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:10,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:10,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:10,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:10,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285064092] [2020-10-15 00:04:10,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:10,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:04:10,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637715537] [2020-10-15 00:04:10,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:04:10,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:04:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:10,886 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 62 states. [2020-10-15 00:04:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:11,049 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-15 00:04:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:04:11,050 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-10-15 00:04:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:11,051 INFO L225 Difference]: With dead ends: 88 [2020-10-15 00:04:11,051 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 00:04:11,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 00:04:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-15 00:04:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:04:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-15 00:04:11,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-15 00:04:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:11,059 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-15 00:04:11,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:04:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-15 00:04:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-15 00:04:11,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:11,060 INFO L422 BasicCegarLoop]: trace histogram [60, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:11,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-15 00:04:11,060 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1495659237, now seen corresponding path program 63 times [2020-10-15 00:04:11,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:11,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11028653] [2020-10-15 00:04:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:11,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:13,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:13,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 00:04:13,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:13,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2486 [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 00:04:13,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:16,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:16,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:16,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:16,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:16,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11028653] [2020-10-15 00:04:16,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:16,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-15 00:04:16,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405946838] [2020-10-15 00:04:16,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 00:04:16,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 00:04:16,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:04:16,274 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 63 states. [2020-10-15 00:04:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:16,411 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-15 00:04:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-15 00:04:16,412 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-15 00:04:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:16,412 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:04:16,413 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:04:16,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:04:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:04:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-15 00:04:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 00:04:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-15 00:04:16,416 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2020-10-15 00:04:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:16,416 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-15 00:04:16,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 00:04:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-15 00:04:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:04:16,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:16,417 INFO L422 BasicCegarLoop]: trace histogram [61, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:16,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-15 00:04:16,418 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -843666149, now seen corresponding path program 64 times [2020-10-15 00:04:16,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:16,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915416785] [2020-10-15 00:04:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:16,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3244 [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-15 00:04:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:04:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:22,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:22,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:22,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:22,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:22,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915416785] [2020-10-15 00:04:22,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:22,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-15 00:04:22,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278787836] [2020-10-15 00:04:22,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-15 00:04:22,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-15 00:04:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:04:22,395 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 64 states. [2020-10-15 00:04:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:22,541 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-15 00:04:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-15 00:04:22,542 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 82 [2020-10-15 00:04:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:22,542 INFO L225 Difference]: With dead ends: 90 [2020-10-15 00:04:22,542 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:04:22,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:04:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:04:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-15 00:04:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:04:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-15 00:04:22,545 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-15 00:04:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:22,546 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-15 00:04:22,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-15 00:04:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-15 00:04:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 00:04:22,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:22,546 INFO L422 BasicCegarLoop]: trace histogram [62, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:22,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-15 00:04:22,547 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -348309083, now seen corresponding path program 65 times [2020-10-15 00:04:22,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:22,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335322424] [2020-10-15 00:04:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:22,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:25,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:25,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2649 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-15 00:04:25,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:28,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:28,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:28,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335322424] [2020-10-15 00:04:28,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:28,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-15 00:04:28,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658589780] [2020-10-15 00:04:28,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-15 00:04:28,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:28,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-15 00:04:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 00:04:28,044 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 65 states. [2020-10-15 00:04:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:28,189 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-15 00:04:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-15 00:04:28,190 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 83 [2020-10-15 00:04:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:28,191 INFO L225 Difference]: With dead ends: 91 [2020-10-15 00:04:28,191 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 00:04:28,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 00:04:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 00:04:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-15 00:04:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:04:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-15 00:04:28,193 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2020-10-15 00:04:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:28,193 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-15 00:04:28,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-15 00:04:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-15 00:04:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:04:28,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:28,194 INFO L422 BasicCegarLoop]: trace histogram [63, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-15 00:04:28,194 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2122858075, now seen corresponding path program 66 times [2020-10-15 00:04:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398634919] [2020-10-15 00:04:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:28,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:28,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:30,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:32,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:32,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:04:32,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:32,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4633 [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:04:32,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:35,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:35,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:35,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2041 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:35,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398634919] [2020-10-15 00:04:35,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:35,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-15 00:04:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067225010] [2020-10-15 00:04:35,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-15 00:04:35,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-15 00:04:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:04:35,816 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 66 states. [2020-10-15 00:04:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:35,974 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-15 00:04:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-15 00:04:35,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 84 [2020-10-15 00:04:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:35,975 INFO L225 Difference]: With dead ends: 92 [2020-10-15 00:04:35,975 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 00:04:35,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:04:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 00:04:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-15 00:04:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:04:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-15 00:04:35,979 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-15 00:04:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:35,979 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-15 00:04:35,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-15 00:04:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-15 00:04:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 00:04:35,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:35,980 INFO L422 BasicCegarLoop]: trace histogram [64, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:35,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-15 00:04:35,980 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1419628645, now seen corresponding path program 67 times [2020-10-15 00:04:35,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:35,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77413085] [2020-10-15 00:04:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:38,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:38,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-15 00:04:38,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:38,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2883 [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-15 00:04:38,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:42,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:42,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:42,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:42,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:42,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:42,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:42,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77413085] [2020-10-15 00:04:42,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:42,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-15 00:04:42,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189616486] [2020-10-15 00:04:42,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-15 00:04:42,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-15 00:04:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 00:04:42,084 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 67 states. [2020-10-15 00:04:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:42,262 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-15 00:04:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-15 00:04:42,262 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 85 [2020-10-15 00:04:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:42,263 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:04:42,263 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:04:42,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 00:04:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:04:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-15 00:04:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 00:04:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-15 00:04:42,266 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2020-10-15 00:04:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:42,267 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-15 00:04:42,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-15 00:04:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-15 00:04:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:04:42,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:42,268 INFO L422 BasicCegarLoop]: trace histogram [65, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:42,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-15 00:04:42,268 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1094352795, now seen corresponding path program 68 times [2020-10-15 00:04:42,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:42,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144395148] [2020-10-15 00:04:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:42,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:44,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:45,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3608 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:04:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:49,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:49,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:49,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:49,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:49,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:49,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144395148] [2020-10-15 00:04:49,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:49,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-15 00:04:49,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184926735] [2020-10-15 00:04:49,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-15 00:04:49,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:49,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-15 00:04:49,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:04:49,163 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 68 states. [2020-10-15 00:04:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:49,295 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-15 00:04:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-15 00:04:49,296 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 86 [2020-10-15 00:04:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:49,297 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:04:49,297 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 00:04:49,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:04:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 00:04:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-15 00:04:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:04:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-15 00:04:49,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-15 00:04:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:49,301 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-15 00:04:49,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-15 00:04:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-15 00:04:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-15 00:04:49,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:49,301 INFO L422 BasicCegarLoop]: trace histogram [66, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:49,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-15 00:04:49,301 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -399263963, now seen corresponding path program 69 times [2020-10-15 00:04:49,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:49,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618871229] [2020-10-15 00:04:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:52,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3250 [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-15 00:04:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-15 00:04:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:56,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:56,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:56,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:56,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2236 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:04:56,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618871229] [2020-10-15 00:04:56,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:56,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-15 00:04:56,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54488703] [2020-10-15 00:04:56,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-15 00:04:56,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-15 00:04:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 00:04:56,031 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 69 states. [2020-10-15 00:04:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:56,190 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-15 00:04:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-15 00:04:56,191 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 87 [2020-10-15 00:04:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:56,192 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:04:56,192 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 00:04:56,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 00:04:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 00:04:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-15 00:04:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 00:04:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-15 00:04:56,195 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2020-10-15 00:04:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:56,196 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-15 00:04:56,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-15 00:04:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-15 00:04:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:04:56,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:56,197 INFO L422 BasicCegarLoop]: trace histogram [67, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:56,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-15 00:04:56,197 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 543256795, now seen corresponding path program 70 times [2020-10-15 00:04:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:56,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54227881] [2020-10-15 00:04:56,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:04:59,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:04:59,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3651 [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:04:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:03,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:03,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:03,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:03,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:03,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:03,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:03,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:03,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:03,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:03,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:03,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2303 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:03,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54227881] [2020-10-15 00:05:03,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-15 00:05:03,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987451783] [2020-10-15 00:05:03,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-15 00:05:03,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-15 00:05:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:05:03,507 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 70 states. [2020-10-15 00:05:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:03,693 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-15 00:05:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-15 00:05:03,694 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 88 [2020-10-15 00:05:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:03,695 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:05:03,695 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 00:05:03,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:05:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 00:05:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-15 00:05:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:05:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-15 00:05:03,699 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-15 00:05:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:03,699 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-15 00:05:03,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-15 00:05:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-15 00:05:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-15 00:05:03,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:03,700 INFO L422 BasicCegarLoop]: trace histogram [68, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:03,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-15 00:05:03,700 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash -303370779, now seen corresponding path program 71 times [2020-10-15 00:05:03,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:03,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867264888] [2020-10-15 00:05:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:03,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:03,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:07,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:07,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-15 00:05:07,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3487 [2020-10-15 00:05:07,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:07,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-15 00:05:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-15 00:05:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:10,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:10,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:10,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:10,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:10,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:10,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:10,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2371 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:10,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867264888] [2020-10-15 00:05:10,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:10,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-15 00:05:10,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826812027] [2020-10-15 00:05:10,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-15 00:05:10,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-15 00:05:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 00:05:10,987 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 71 states. [2020-10-15 00:05:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:11,175 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-15 00:05:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-15 00:05:11,176 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 89 [2020-10-15 00:05:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:11,177 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:05:11,177 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 00:05:11,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 00:05:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 00:05:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-15 00:05:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 00:05:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-15 00:05:11,182 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2020-10-15 00:05:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:11,182 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-15 00:05:11,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-15 00:05:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-15 00:05:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:05:11,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:11,183 INFO L422 BasicCegarLoop]: trace histogram [69, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:11,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-15 00:05:11,183 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash -779021797, now seen corresponding path program 72 times [2020-10-15 00:05:11,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:11,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848211456] [2020-10-15 00:05:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:11,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3930 [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-15 00:05:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:05:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:19,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:19,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:19,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:19,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:19,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:19,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848211456] [2020-10-15 00:05:19,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:19,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-15 00:05:19,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285268232] [2020-10-15 00:05:19,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-15 00:05:19,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-15 00:05:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:05:19,057 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 72 states. [2020-10-15 00:05:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:19,241 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-15 00:05:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-15 00:05:19,243 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2020-10-15 00:05:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:19,244 INFO L225 Difference]: With dead ends: 98 [2020-10-15 00:05:19,244 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 00:05:19,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:05:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 00:05:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-15 00:05:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:05:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-15 00:05:19,248 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-15 00:05:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:19,248 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-15 00:05:19,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-15 00:05:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-15 00:05:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-15 00:05:19,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:19,249 INFO L422 BasicCegarLoop]: trace histogram [70, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:19,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-15 00:05:19,249 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1655665829, now seen corresponding path program 73 times [2020-10-15 00:05:19,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:19,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597544125] [2020-10-15 00:05:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:19,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:23,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:23,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-15 00:05:23,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:23,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3852 [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-15 00:05:23,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:26,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:26,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:26,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:26,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:26,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:26,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:26,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:27,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597544125] [2020-10-15 00:05:27,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:27,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-15 00:05:27,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518392650] [2020-10-15 00:05:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-15 00:05:27,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-15 00:05:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:05:27,011 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 73 states. [2020-10-15 00:05:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:27,166 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-15 00:05:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-15 00:05:27,168 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 91 [2020-10-15 00:05:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:27,168 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:05:27,168 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 00:05:27,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:05:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 00:05:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-15 00:05:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 00:05:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-15 00:05:27,171 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2020-10-15 00:05:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:27,171 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-15 00:05:27,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-15 00:05:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-15 00:05:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:05:27,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:27,172 INFO L422 BasicCegarLoop]: trace histogram [71, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:27,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-15 00:05:27,172 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -178429093, now seen corresponding path program 74 times [2020-10-15 00:05:27,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:27,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311109548] [2020-10-15 00:05:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:27,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:30,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4215 [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:31,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-15 00:05:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:31,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:05:31,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:35,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:35,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:35,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:35,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:35,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311109548] [2020-10-15 00:05:35,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:35,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-15 00:05:35,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423571893] [2020-10-15 00:05:35,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-15 00:05:35,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-15 00:05:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:05:35,440 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 74 states. [2020-10-15 00:05:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:35,620 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-15 00:05:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-15 00:05:35,620 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 92 [2020-10-15 00:05:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:35,621 INFO L225 Difference]: With dead ends: 100 [2020-10-15 00:05:35,621 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:05:35,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:05:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:05:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-15 00:05:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:05:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-15 00:05:35,625 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2020-10-15 00:05:35,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:35,625 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-15 00:05:35,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-15 00:05:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-15 00:05:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-15 00:05:35,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:35,626 INFO L422 BasicCegarLoop]: trace histogram [72, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:35,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-15 00:05:35,627 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1200796827, now seen corresponding path program 75 times [2020-10-15 00:05:35,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:35,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836457050] [2020-10-15 00:05:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:35,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:35,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:39,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3984 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-15 00:05:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:43,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:43,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:43,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836457050] [2020-10-15 00:05:43,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:43,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-15 00:05:43,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493934510] [2020-10-15 00:05:43,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-15 00:05:43,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-15 00:05:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 00:05:43,839 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 75 states. [2020-10-15 00:05:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:44,080 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-15 00:05:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-15 00:05:44,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 93 [2020-10-15 00:05:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:44,082 INFO L225 Difference]: With dead ends: 101 [2020-10-15 00:05:44,082 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 00:05:44,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 00:05:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 00:05:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-15 00:05:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 00:05:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-15 00:05:44,087 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2020-10-15 00:05:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:44,087 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-15 00:05:44,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-15 00:05:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-15 00:05:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:05:44,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:44,088 INFO L422 BasicCegarLoop]: trace histogram [73, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:44,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-15 00:05:44,088 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1465541787, now seen corresponding path program 76 times [2020-10-15 00:05:44,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:44,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062653459] [2020-10-15 00:05:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:44,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-15 00:05:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:53,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:53,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:05:53,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062653459] [2020-10-15 00:05:53,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:53,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-15 00:05:53,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054633385] [2020-10-15 00:05:53,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-15 00:05:53,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-15 00:05:53,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:05:53,596 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 76 states. [2020-10-15 00:05:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:53,753 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-15 00:05:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-15 00:05:53,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2020-10-15 00:05:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:53,755 INFO L225 Difference]: With dead ends: 102 [2020-10-15 00:05:53,755 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 00:05:53,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:05:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 00:05:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-15 00:05:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:05:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-15 00:05:53,759 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-10-15 00:05:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:53,759 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-15 00:05:53,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-15 00:05:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-15 00:05:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-15 00:05:53,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:53,761 INFO L422 BasicCegarLoop]: trace histogram [74, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:53,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-15 00:05:53,761 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1777307099, now seen corresponding path program 77 times [2020-10-15 00:05:53,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:53,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169610390] [2020-10-15 00:05:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:58,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-15 00:05:58,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4458 [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-15 00:05:58,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:03,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:03,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:03,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:03,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:03,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:03,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:06:03,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169610390] [2020-10-15 00:06:03,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:03,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-15 00:06:03,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685590337] [2020-10-15 00:06:03,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-15 00:06:03,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-15 00:06:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 00:06:03,170 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 77 states. [2020-10-15 00:06:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:03,422 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-15 00:06:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-15 00:06:03,423 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 95 [2020-10-15 00:06:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:03,423 INFO L225 Difference]: With dead ends: 103 [2020-10-15 00:06:03,424 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 00:06:03,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 00:06:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 00:06:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-15 00:06:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 00:06:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-15 00:06:03,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2020-10-15 00:06:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:03,427 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-15 00:06:03,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-15 00:06:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-15 00:06:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:06:03,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:03,428 INFO L422 BasicCegarLoop]: trace histogram [75, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:03,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-15 00:06:03,429 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 773592539, now seen corresponding path program 78 times [2020-10-15 00:06:03,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:03,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71074690] [2020-10-15 00:06:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:03,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:08,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:08,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-15 00:06:08,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:13,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:13,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:13,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:13,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:13,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:13,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:13,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:13,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:13,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2875 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-15 00:06:13,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71074690] [2020-10-15 00:06:13,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:13,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-15 00:06:13,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555655068] [2020-10-15 00:06:13,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-15 00:06:13,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-15 00:06:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:06:13,608 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 78 states. [2020-10-15 00:06:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:13,838 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-15 00:06:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-15 00:06:13,839 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 96 [2020-10-15 00:06:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:13,841 INFO L225 Difference]: With dead ends: 104 [2020-10-15 00:06:13,841 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 00:06:13,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:06:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 00:06:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-15 00:06:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 00:06:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-15 00:06:13,847 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-10-15 00:06:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:13,847 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-15 00:06:13,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-15 00:06:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-15 00:06:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-15 00:06:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:13,849 INFO L422 BasicCegarLoop]: trace histogram [76, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:13,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-15 00:06:13,849 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:13,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1752897307, now seen corresponding path program 79 times [2020-10-15 00:06:13,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:13,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035088551] [2020-10-15 00:06:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:13,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking...