/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/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:05:38,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:05:38,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:05:38,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:05:38,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:05:38,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:05:38,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:05:38,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:05:38,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:05:38,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:05:38,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:05:38,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:05:38,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:05:38,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:05:38,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:05:38,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:05:38,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:05:38,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:05:38,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:05:38,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:05:38,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:05:38,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:05:38,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:05:38,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:05:38,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:05:38,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:05:38,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:05:38,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:05:38,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:05:38,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:05:38,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:05:38,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:05:38,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:05:38,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:05:38,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:05:38,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:05:38,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:05:38,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:05:38,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:05:38,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:05:38,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:05:38,409 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 00:05:38,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:05:38,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:05:38,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:05:38,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:05:38,457 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:05:38,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:05:38,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:05:38,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:05:38,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:05:38,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:05:38,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:05:38,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:05:38,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:05:38,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:05:38,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:05:38,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:05:38,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:05:38,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:05:38,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:05:38,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:05:38,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:05:38,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:05:38,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:05:38,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:05:38,463 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 00:05:38,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:05:38,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:05:38,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:05:38,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:05:38,799 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:05:38,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2020-10-15 00:05:38,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202a9d27d/8f74fae22d304dc28fc7d785fe0402ee/FLAGabcf0777b [2020-10-15 00:05:39,299 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:05:39,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2020-10-15 00:05:39,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202a9d27d/8f74fae22d304dc28fc7d785fe0402ee/FLAGabcf0777b [2020-10-15 00:05:39,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/202a9d27d/8f74fae22d304dc28fc7d785fe0402ee [2020-10-15 00:05:39,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:05:39,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:05:39,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:05:39,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:05:39,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:05:39,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:39,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4b02d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39, skipping insertion in model container [2020-10-15 00:05:39,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:39,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:05:39,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:05:39,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:05:39,930 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:05:39,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:05:39,962 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:05:39,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39 WrapperNode [2020-10-15 00:05:39,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:05:39,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:05:39,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:05:39,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:05:39,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:39,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (1/1) ... [2020-10-15 00:05:40,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:05:40,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:05:40,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:05:40,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:05:40,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (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 00:05:40,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:05:40,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:05:40,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:05:40,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:05:40,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:05:40,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:05:40,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:05:40,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:05:40,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:05:40,351 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:05:40,351 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-15 00:05:40,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:40 BoogieIcfgContainer [2020-10-15 00:05:40,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:05:40,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:05:40,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:05:40,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:05:40,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:39" (1/3) ... [2020-10-15 00:05:40,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1589b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:40, skipping insertion in model container [2020-10-15 00:05:40,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:39" (2/3) ... [2020-10-15 00:05:40,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af1589b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:40, skipping insertion in model container [2020-10-15 00:05:40,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:40" (3/3) ... [2020-10-15 00:05:40,363 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2020-10-15 00:05:40,373 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:05:40,380 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:05:40,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:05:40,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:05:40,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:05:40,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:05:40,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:05:40,445 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:05:40,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:05:40,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:05:40,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:05:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-15 00:05:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:05:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:40,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:40,474 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-10-15 00:05:40,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:40,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066122407] [2020-10-15 00:05:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:40,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:40,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:40,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:05:40,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:40,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-15 00:05:40,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:40,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:05:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:05:40,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:05:41,148 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-10-15 00:05:41,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:41,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:05:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:41,179 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 00:05:41,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066122407] [2020-10-15 00:05:41,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:05:41,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:05:41,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26859625] [2020-10-15 00:05:41,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:05:41,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:05:41,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:05:41,205 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-10-15 00:05:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:41,308 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2020-10-15 00:05:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:05:41,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-15 00:05:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:41,319 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:05:41,320 INFO L226 Difference]: Without dead ends: 37 [2020-10-15 00:05:41,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:05:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-15 00:05:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-15 00:05:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:05:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-15 00:05:41,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-10-15 00:05:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:41,369 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-15 00:05:41,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:05:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-15 00:05:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:05:41,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:41,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:41,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:05:41,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:41,372 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-10-15 00:05:41,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:41,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965155701] [2020-10-15 00:05:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:05:41,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-15 00:05:41,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:05:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:05:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:05:41,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:41,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:41,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:41,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:05:41,616 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 00:05:41,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965155701] [2020-10-15 00:05:41,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:41,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:05:41,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530363931] [2020-10-15 00:05:41,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:05:41,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:05:41,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:05:41,620 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-15 00:05:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:41,650 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-15 00:05:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:05:41,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-15 00:05:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:41,652 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:05:41,652 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:05:41,653 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 00:05:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:05:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-15 00:05:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 00:05:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-15 00:05:41,661 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-10-15 00:05:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:41,661 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-15 00:05:41,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:05:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-15 00:05:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:05:41,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:41,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:41,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:05:41,663 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash -465234410, now seen corresponding path program 2 times [2020-10-15 00:05:41,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:41,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326983396] [2020-10-15 00:05:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:05:41,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-15 00:05:41,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:05:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:41,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:05:41,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:41,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:41,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:41,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:41,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:41,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:41,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:41,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:41,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:41,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:41,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:41,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:41,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326983396] [2020-10-15 00:05:41,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:41,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:05:41,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211506241] [2020-10-15 00:05:41,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:05:41,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:05:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:05:41,835 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-15 00:05:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:41,867 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-15 00:05:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:05:41,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-15 00:05:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:41,869 INFO L225 Difference]: With dead ends: 55 [2020-10-15 00:05:41,869 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:05:41,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:05:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:05:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-15 00:05:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:05:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-15 00:05:41,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-10-15 00:05:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:41,877 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-15 00:05:41,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:05:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-15 00:05:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:05:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:41,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:41,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:05:41,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 219297684, now seen corresponding path program 3 times [2020-10-15 00:05:41,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:41,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137920796] [2020-10-15 00:05:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:05:42,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-15 00:05:42,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:05:42,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:42,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:05:42,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:42,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:05:42,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:42,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:42,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137920796] [2020-10-15 00:05:42,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:42,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:05:42,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353202706] [2020-10-15 00:05:42,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:05:42,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:05:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:05:42,126 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-15 00:05:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:42,173 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-15 00:05:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:05:42,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-15 00:05:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:42,175 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:05:42,175 INFO L226 Difference]: Without dead ends: 37 [2020-10-15 00:05:42,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:05:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-15 00:05:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-15 00:05:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:05:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-15 00:05:42,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-15 00:05:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:42,182 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-15 00:05:42,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:05:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-15 00:05:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:05:42,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:42,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:42,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:05:42,184 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:42,184 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 4 times [2020-10-15 00:05:42,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:42,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117009434] [2020-10-15 00:05:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:05:42,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-15 00:05:42,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:05:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:05:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:42,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:42,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:42,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:42,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:42,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:42,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117009434] [2020-10-15 00:05:42,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:42,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:05:42,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857788974] [2020-10-15 00:05:42,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:05:42,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:05:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:05:42,511 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-10-15 00:05:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:42,649 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-10-15 00:05:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:05:42,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-15 00:05:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:42,651 INFO L225 Difference]: With dead ends: 54 [2020-10-15 00:05:42,651 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:05:42,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:05:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:05:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-10-15 00:05:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:05:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-10-15 00:05:42,659 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2020-10-15 00:05:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:42,659 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-15 00:05:42,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:05:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-10-15 00:05:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:05:42,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:42,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:42,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:05:42,661 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash 157361168, now seen corresponding path program 5 times [2020-10-15 00:05:42,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589230445] [2020-10-15 00:05:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:05:42,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-15 00:05:42,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:05:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:05:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:42,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:42,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:42,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:42,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589230445] [2020-10-15 00:05:42,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:42,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:05:42,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47674203] [2020-10-15 00:05:42,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:05:42,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:42,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:05:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:05:42,950 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2020-10-15 00:05:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:43,032 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-15 00:05:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:05:43,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-15 00:05:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:43,034 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:05:43,034 INFO L226 Difference]: Without dead ends: 41 [2020-10-15 00:05:43,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:05:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-15 00:05:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-15 00:05:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 00:05:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-15 00:05:43,045 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-15 00:05:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:43,046 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-15 00:05:43,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:05:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-15 00:05:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:05:43,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:43,047 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:43,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:05:43,047 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1533193998, now seen corresponding path program 6 times [2020-10-15 00:05:43,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:43,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448014258] [2020-10-15 00:05:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:05:43,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-15 00:05:43,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:05:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:05:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:43,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:43,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:43,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:43,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448014258] [2020-10-15 00:05:43,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:43,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:05:43,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057029152] [2020-10-15 00:05:43,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:05:43,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:05:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:05:43,402 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-10-15 00:05:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:43,492 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-15 00:05:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:05:43,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-15 00:05:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:43,493 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:05:43,494 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 00:05:43,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:05:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 00:05:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-15 00:05:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:05:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-15 00:05:43,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-15 00:05:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:43,505 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-15 00:05:43,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:05:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-15 00:05:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:05:43,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:43,507 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:43,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:05:43,507 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash 858616460, now seen corresponding path program 7 times [2020-10-15 00:05:43,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:43,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676788733] [2020-10-15 00:05:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:05:43,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-15 00:05:43,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:05:43,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:05:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:43,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:43,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:43,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:43,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:43,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676788733] [2020-10-15 00:05:43,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:43,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:05:43,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812265475] [2020-10-15 00:05:43,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:05:43,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:05:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:05:43,852 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-10-15 00:05:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:43,967 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-15 00:05:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:05:43,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-15 00:05:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:43,968 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:05:43,968 INFO L226 Difference]: Without dead ends: 45 [2020-10-15 00:05:43,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:05:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-15 00:05:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-15 00:05:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:05:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-15 00:05:43,974 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-15 00:05:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:43,975 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-15 00:05:43,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:05:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-15 00:05:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:05:43,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:43,976 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:43,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:05:43,977 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1129664138, now seen corresponding path program 8 times [2020-10-15 00:05:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:43,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639901766] [2020-10-15 00:05:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:44,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:44,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:05:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-15 00:05:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:44,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:05:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:05:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:47,737 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 52 DAG size of output: 15 [2020-10-15 00:05:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:47,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:47,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:47,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:47,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:47,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:47,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:47,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:47,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:47,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639901766] [2020-10-15 00:05:47,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:47,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:05:47,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369533693] [2020-10-15 00:05:47,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:05:47,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:05:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:05:47,794 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 13 states. [2020-10-15 00:05:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:48,094 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-15 00:05:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:05:48,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-15 00:05:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:48,096 INFO L225 Difference]: With dead ends: 62 [2020-10-15 00:05:48,096 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 00:05:48,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:05:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 00:05:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 00:05:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:05:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-15 00:05:48,110 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 30 [2020-10-15 00:05:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:48,110 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-15 00:05:48,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:05:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-15 00:05:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:05:48,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:48,113 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:48,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:05:48,113 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:48,114 INFO L82 PathProgramCache]: Analyzing trace with hash -386522360, now seen corresponding path program 9 times [2020-10-15 00:05:48,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:48,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860793234] [2020-10-15 00:05:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:48,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:48,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:05:48,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:48,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-15 00:05:48,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:48,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:05:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:05:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:48,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:48,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:48,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:48,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:48,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:48,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860793234] [2020-10-15 00:05:48,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:48,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:05:48,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753657493] [2020-10-15 00:05:48,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:05:48,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:05:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:05:48,562 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 12 states. [2020-10-15 00:05:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:48,708 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-15 00:05:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:05:48,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-15 00:05:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:48,710 INFO L225 Difference]: With dead ends: 88 [2020-10-15 00:05:48,710 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 00:05:48,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:05:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 00:05:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-15 00:05:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:05:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-15 00:05:48,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-15 00:05:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:48,720 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-15 00:05:48,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:05:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-15 00:05:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:05:48,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:48,723 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:48,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:05:48,723 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 10 times [2020-10-15 00:05:48,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:48,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830217497] [2020-10-15 00:05:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:48,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:49,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:05:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:49,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-15 00:05:49,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:49,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:49,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:05:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:49,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:05:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:49,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:49,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:49,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:05:49,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:49,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:49,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:49,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:49,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830217497] [2020-10-15 00:05:49,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:49,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:05:49,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741354505] [2020-10-15 00:05:49,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:05:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:05:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:05:49,188 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-10-15 00:05:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:49,363 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-15 00:05:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:05:49,365 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-15 00:05:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:49,366 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:05:49,366 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 00:05:49,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:05:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 00:05:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-15 00:05:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 00:05:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-15 00:05:49,381 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-15 00:05:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:49,382 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-15 00:05:49,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:05:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-15 00:05:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:05:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:49,387 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:49,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:05:49,388 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash 834286980, now seen corresponding path program 11 times [2020-10-15 00:05:49,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:49,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842893119] [2020-10-15 00:05:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:49,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:05:49,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-15 00:05:49,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:49,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:05:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:49,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:05:49,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:50,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:50,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:50,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:50,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:50,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:50,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842893119] [2020-10-15 00:05:50,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:50,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:05:50,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884297299] [2020-10-15 00:05:50,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:05:50,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:05:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:05:50,117 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-10-15 00:05:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:50,313 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-15 00:05:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:05:50,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-15 00:05:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:50,314 INFO L225 Difference]: With dead ends: 91 [2020-10-15 00:05:50,315 INFO L226 Difference]: Without dead ends: 53 [2020-10-15 00:05:50,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:05:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-15 00:05:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-10-15 00:05:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 00:05:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-15 00:05:50,326 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-15 00:05:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:50,326 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-15 00:05:50,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:05:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-15 00:05:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:05:50,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:50,329 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:50,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:05:50,330 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash -776129662, now seen corresponding path program 12 times [2020-10-15 00:05:50,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:50,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574199471] [2020-10-15 00:05:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:50,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:50,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:05:50,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-15 00:05:50,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:50,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:05:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:50,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:05:50,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:51,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:51,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:51,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:51,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:51,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:51,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:51,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:51,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:51,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:51,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:51,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:51,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:51,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574199471] [2020-10-15 00:05:51,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:51,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:05:51,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721382414] [2020-10-15 00:05:51,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:05:51,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:51,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:05:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:05:51,179 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-10-15 00:05:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:51,430 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2020-10-15 00:05:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:05:51,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-15 00:05:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:51,431 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:05:51,431 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 00:05:51,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:05:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 00:05:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-15 00:05:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:05:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-15 00:05:51,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-15 00:05:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:51,437 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-15 00:05:51,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:05:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-15 00:05:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:05:51,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:51,439 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:51,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:05:51,439 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2096671232, now seen corresponding path program 13 times [2020-10-15 00:05:51,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:51,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075045349] [2020-10-15 00:05:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:51,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:51,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:51,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:05:51,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:51,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-15 00:05:51,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:51,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:05:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:51,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:05:51,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:51,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:51,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:51,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:51,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:51,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075045349] [2020-10-15 00:05:51,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:51,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:05:51,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753393856] [2020-10-15 00:05:51,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:05:51,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:05:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:05:51,996 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 16 states. [2020-10-15 00:05:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:52,280 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-15 00:05:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:05:52,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-15 00:05:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:52,282 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:05:52,282 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:05:52,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:05:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:05:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-15 00:05:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 00:05:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-15 00:05:52,291 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-15 00:05:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:52,294 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-15 00:05:52,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:05:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-15 00:05:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:05:52,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:52,295 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:52,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:05:52,296 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1194359038, now seen corresponding path program 14 times [2020-10-15 00:05:52,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:52,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875693906] [2020-10-15 00:05:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:52,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:05:52,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-15 00:05:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:52,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:05:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:52,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:05:52,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:52,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:52,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:52,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:52,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:52,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:52,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:52,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875693906] [2020-10-15 00:05:52,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:52,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:05:52,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976627462] [2020-10-15 00:05:52,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:05:52,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:05:52,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:05:52,907 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 17 states. [2020-10-15 00:05:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:53,194 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-15 00:05:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:05:53,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-15 00:05:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:53,195 INFO L225 Difference]: With dead ends: 103 [2020-10-15 00:05:53,196 INFO L226 Difference]: Without dead ends: 59 [2020-10-15 00:05:53,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:05:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-15 00:05:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-15 00:05:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:05:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-15 00:05:53,203 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-15 00:05:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:53,204 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-15 00:05:53,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:05:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-15 00:05:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:05:53,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:53,205 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:53,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:05:53,206 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1655734396, now seen corresponding path program 15 times [2020-10-15 00:05:53,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:53,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692173793] [2020-10-15 00:05:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:05:53,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-15 00:05:53,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:05:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:05:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:53,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:53,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:53,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692173793] [2020-10-15 00:05:53,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:53,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:05:53,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59647242] [2020-10-15 00:05:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:05:53,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:53,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:05:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:05:53,830 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-10-15 00:05:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:54,168 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-15 00:05:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:05:54,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-15 00:05:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:54,169 INFO L225 Difference]: With dead ends: 107 [2020-10-15 00:05:54,169 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 00:05:54,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:05:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 00:05:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-15 00:05:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:05:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-15 00:05:54,175 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-15 00:05:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:54,175 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-15 00:05:54,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:05:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-15 00:05:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:05:54,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:54,176 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:54,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:05:54,176 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1639145350, now seen corresponding path program 16 times [2020-10-15 00:05:54,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:54,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285367332] [2020-10-15 00:05:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-15 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:54,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:05:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:54,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:05:54,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:54,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:54,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:54,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:54,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:54,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:54,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:54,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285367332] [2020-10-15 00:05:54,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:54,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:05:54,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715945244] [2020-10-15 00:05:54,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:05:54,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:54,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:05:54,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:05:54,940 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 19 states. [2020-10-15 00:05:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:55,353 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-15 00:05:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:05:55,356 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-15 00:05:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:55,357 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:05:55,357 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 00:05:55,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:05:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 00:05:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-10-15 00:05:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:05:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-15 00:05:55,365 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-15 00:05:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-15 00:05:55,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:05:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-15 00:05:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:05:55,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:55,366 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:55,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:05:55,367 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1667283192, now seen corresponding path program 17 times [2020-10-15 00:05:55,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:55,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194322764] [2020-10-15 00:05:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:55,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:05:55,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:55,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:05:55,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:56,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:56,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:56,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:56,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:56,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:56,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:56,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194322764] [2020-10-15 00:05:56,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:56,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:05:56,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569054976] [2020-10-15 00:05:56,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:05:56,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:05:56,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:05:56,196 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 20 states. [2020-10-15 00:05:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:56,572 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2020-10-15 00:05:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:05:56,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-15 00:05:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:56,573 INFO L225 Difference]: With dead ends: 115 [2020-10-15 00:05:56,573 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 00:05:56,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:05:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 00:05:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-10-15 00:05:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:05:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-15 00:05:56,579 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-15 00:05:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:56,579 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-15 00:05:56,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:05:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-15 00:05:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:05:56,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:56,582 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:56,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:05:56,582 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:56,583 INFO L82 PathProgramCache]: Analyzing trace with hash 869313014, now seen corresponding path program 18 times [2020-10-15 00:05:56,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:56,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128155735] [2020-10-15 00:05:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:56,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:57,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:57,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:05:57,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-15 00:05:57,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:57,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:05:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:05:57,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:57,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:57,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:57,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:57,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:57,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:57,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:57,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:57,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:57,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128155735] [2020-10-15 00:05:57,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:57,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:05:57,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441362086] [2020-10-15 00:05:57,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:05:57,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:05:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:05:57,555 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 21 states. [2020-10-15 00:05:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:58,004 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-10-15 00:05:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:05:58,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-15 00:05:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:58,006 INFO L225 Difference]: With dead ends: 119 [2020-10-15 00:05:58,006 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 00:05:58,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:05:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 00:05:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-10-15 00:05:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:05:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-15 00:05:58,014 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-15 00:05:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-15 00:05:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:05:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-15 00:05:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:05:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:58,015 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:58,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:05:58,016 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1475849356, now seen corresponding path program 19 times [2020-10-15 00:05:58,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:58,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492776067] [2020-10-15 00:05:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:58,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:58,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:05:58,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-15 00:05:58,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:58,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:05:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:05:58,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:05:58,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:58,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:58,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:58,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:58,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:58,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492776067] [2020-10-15 00:05:58,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:58,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:05:58,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467108741] [2020-10-15 00:05:58,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:05:58,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:05:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:05:58,733 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2020-10-15 00:05:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:59,287 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-15 00:05:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:05:59,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-15 00:05:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:59,291 INFO L225 Difference]: With dead ends: 123 [2020-10-15 00:05:59,291 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:05:59,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:05:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:05:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-15 00:05:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:05:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-15 00:05:59,299 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-15 00:05:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:59,299 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-15 00:05:59,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:05:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-15 00:05:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:05:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:59,300 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:59,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:05:59,301 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -319056526, now seen corresponding path program 20 times [2020-10-15 00:05:59,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:59,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890850905] [2020-10-15 00:05:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:59,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:00,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:00,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:06:00,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:00,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-15 00:06:00,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:00,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:06:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:06:00,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:00,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:00,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:00,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:00,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:00,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:00,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:00,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:00,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:00,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:00,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890850905] [2020-10-15 00:06:00,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:00,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:06:00,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835267903] [2020-10-15 00:06:00,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:06:00,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:06:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:06:00,632 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 23 states. [2020-10-15 00:06:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:01,218 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-10-15 00:06:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:06:01,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-15 00:06:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:01,219 INFO L225 Difference]: With dead ends: 127 [2020-10-15 00:06:01,219 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:06:01,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:06:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:06:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-10-15 00:06:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:06:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-15 00:06:01,225 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-15 00:06:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:01,225 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-15 00:06:01,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:06:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-15 00:06:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:06:01,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:01,226 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:01,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:06:01,226 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:01,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1037676560, now seen corresponding path program 21 times [2020-10-15 00:06:01,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:01,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467682670] [2020-10-15 00:06:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:01,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:01,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:01,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:06:01,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-15 00:06:01,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:01,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:06:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:01,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:06:01,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:02,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:02,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:02,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:02,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:02,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:02,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:02,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:02,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:02,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467682670] [2020-10-15 00:06:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:06:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409120070] [2020-10-15 00:06:02,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:06:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:06:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:06:02,181 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 24 states. [2020-10-15 00:06:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:02,830 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-10-15 00:06:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:06:02,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-15 00:06:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:02,834 INFO L225 Difference]: With dead ends: 131 [2020-10-15 00:06:02,834 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:06:02,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:06:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:06:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-10-15 00:06:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:06:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-15 00:06:02,844 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-15 00:06:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:02,845 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-15 00:06:02,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:06:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-15 00:06:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:06:02,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:02,845 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:02,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:06:02,846 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash -141794578, now seen corresponding path program 22 times [2020-10-15 00:06:02,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:02,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21389592] [2020-10-15 00:06:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:02,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:03,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:03,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:06:03,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:03,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-15 00:06:03,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:03,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:06:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:03,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:06:03,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:04,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:04,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:04,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:06:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:04,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21389592] [2020-10-15 00:06:04,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:04,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:06:04,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463955165] [2020-10-15 00:06:04,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:06:04,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:06:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:06:04,108 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 25 states. [2020-10-15 00:06:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:04,798 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-15 00:06:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:06:04,801 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-15 00:06:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:04,802 INFO L225 Difference]: With dead ends: 135 [2020-10-15 00:06:04,802 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:06:04,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:06:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:06:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-15 00:06:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:06:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-15 00:06:04,811 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-15 00:06:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:04,811 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-15 00:06:04,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:06:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-15 00:06:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:06:04,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:04,812 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:04,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:06:04,813 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1807330924, now seen corresponding path program 23 times [2020-10-15 00:06:04,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:04,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463045020] [2020-10-15 00:06:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:04,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:05,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:05,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:06:05,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-15 00:06:05,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:05,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:06:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:06:05,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:06,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:06,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:06,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:06,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:06,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:06:06,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:06,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:06,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463045020] [2020-10-15 00:06:06,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:06,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:06:06,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507350921] [2020-10-15 00:06:06,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:06:06,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:06:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:06:06,261 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 26 states. [2020-10-15 00:06:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:07,058 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2020-10-15 00:06:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:06:07,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-15 00:06:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:07,060 INFO L225 Difference]: With dead ends: 139 [2020-10-15 00:06:07,060 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 00:06:07,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:06:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 00:06:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-15 00:06:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:06:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-15 00:06:07,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-15 00:06:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:07,065 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-15 00:06:07,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:06:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-15 00:06:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:06:07,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:07,066 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:07,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:06:07,066 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1983770006, now seen corresponding path program 24 times [2020-10-15 00:06:07,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:07,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313036551] [2020-10-15 00:06:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:07,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:07,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:07,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:07,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:06:07,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:07,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:06:07,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:08,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:08,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:08,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:08,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:08,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:08,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:08,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:08,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313036551] [2020-10-15 00:06:08,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:08,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:06:08,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581800205] [2020-10-15 00:06:08,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:06:08,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:06:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:06:08,579 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 27 states. [2020-10-15 00:06:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:09,342 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2020-10-15 00:06:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:06:09,343 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-15 00:06:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:09,344 INFO L225 Difference]: With dead ends: 143 [2020-10-15 00:06:09,344 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 00:06:09,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:06:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 00:06:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-10-15 00:06:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:06:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-15 00:06:09,354 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-15 00:06:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:09,354 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-15 00:06:09,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:06:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-15 00:06:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:06:09,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:09,356 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:09,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:06:09,356 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:09,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1195470568, now seen corresponding path program 25 times [2020-10-15 00:06:09,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:09,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470611636] [2020-10-15 00:06:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:09,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:09,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-15 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:06:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:09,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:06:09,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:10,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:10,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:10,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:10,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:10,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:10,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:10,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:10,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:06:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:10,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470611636] [2020-10-15 00:06:10,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:10,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:06:10,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743331127] [2020-10-15 00:06:10,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:06:10,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:06:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:06:10,678 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 28 states. [2020-10-15 00:06:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:11,565 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-15 00:06:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:06:11,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-15 00:06:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:11,566 INFO L225 Difference]: With dead ends: 147 [2020-10-15 00:06:11,566 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:06:11,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:06:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:06:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-15 00:06:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:06:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-15 00:06:11,572 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-15 00:06:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:11,572 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-15 00:06:11,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:06:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-15 00:06:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:06:11,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:11,573 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:11,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:06:11,573 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1571052570, now seen corresponding path program 26 times [2020-10-15 00:06:11,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:11,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682628423] [2020-10-15 00:06:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:11,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:12,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:12,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:06:12,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:06:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:12,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:12,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:12,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:12,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:12,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:12,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682628423] [2020-10-15 00:06:12,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:12,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:06:12,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976731612] [2020-10-15 00:06:12,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:06:12,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:06:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:06:12,715 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 29 states. [2020-10-15 00:06:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:13,645 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2020-10-15 00:06:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:06:13,646 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-15 00:06:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:13,647 INFO L225 Difference]: With dead ends: 151 [2020-10-15 00:06:13,648 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 00:06:13,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:06:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 00:06:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-10-15 00:06:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:06:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-15 00:06:13,653 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-15 00:06:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:13,653 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-15 00:06:13,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:06:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-15 00:06:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:06:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:13,654 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:13,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:06:13,654 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:13,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1615031964, now seen corresponding path program 27 times [2020-10-15 00:06:13,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:13,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157016334] [2020-10-15 00:06:13,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:14,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:06:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:14,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:14,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:14,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:14,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:14,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:14,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:14,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:14,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:14,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157016334] [2020-10-15 00:06:14,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:14,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:06:14,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284798528] [2020-10-15 00:06:14,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:06:14,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:06:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:06:14,981 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 30 states. [2020-10-15 00:06:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:15,965 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2020-10-15 00:06:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:06:15,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-15 00:06:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:15,968 INFO L225 Difference]: With dead ends: 155 [2020-10-15 00:06:15,968 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:06:15,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:06:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:06:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-10-15 00:06:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:06:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-15 00:06:15,973 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-15 00:06:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:15,973 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-15 00:06:15,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:06:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-15 00:06:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:06:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:15,974 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:15,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:06:15,975 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash -929556638, now seen corresponding path program 28 times [2020-10-15 00:06:15,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:15,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366414989] [2020-10-15 00:06:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:16,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:16,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:16,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:06:16,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:16,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:06:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:17,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:17,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:17,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:17,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:17,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:17,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:17,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:17,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:17,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:17,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366414989] [2020-10-15 00:06:17,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:17,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:06:17,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421171406] [2020-10-15 00:06:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:06:17,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:06:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:06:17,617 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 31 states. [2020-10-15 00:06:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:18,670 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-15 00:06:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:06:18,673 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-15 00:06:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:18,673 INFO L225 Difference]: With dead ends: 159 [2020-10-15 00:06:18,673 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 00:06:18,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:06:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 00:06:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-15 00:06:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:06:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-15 00:06:18,679 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-15 00:06:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:18,680 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-15 00:06:18,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:06:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-15 00:06:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:06:18,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:18,681 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:18,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:06:18,681 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:18,681 INFO L82 PathProgramCache]: Analyzing trace with hash 682235360, now seen corresponding path program 29 times [2020-10-15 00:06:18,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:18,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348274079] [2020-10-15 00:06:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:19,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:06:19,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:20,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:20,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:20,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:20,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:20,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:20,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:20,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:20,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:20,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:20,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:20,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348274079] [2020-10-15 00:06:20,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:20,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:06:20,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641865760] [2020-10-15 00:06:20,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:06:20,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:06:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:06:20,012 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 32 states. [2020-10-15 00:06:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:21,145 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2020-10-15 00:06:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:06:21,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-15 00:06:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:21,146 INFO L225 Difference]: With dead ends: 163 [2020-10-15 00:06:21,146 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 00:06:21,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:06:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 00:06:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-10-15 00:06:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:06:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-15 00:06:21,151 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-15 00:06:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:21,152 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-15 00:06:21,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:06:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-15 00:06:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:06:21,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:21,152 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:21,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:06:21,153 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -868848418, now seen corresponding path program 30 times [2020-10-15 00:06:21,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:21,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202330769] [2020-10-15 00:06:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:21,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:21,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:06:21,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-15 00:06:21,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:21,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:06:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:21,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:06:21,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:22,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:22,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:22,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:22,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:22,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202330769] [2020-10-15 00:06:22,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:22,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:06:22,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028287919] [2020-10-15 00:06:22,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:06:22,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:06:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:06:22,649 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 33 states. [2020-10-15 00:06:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:23,830 INFO L93 Difference]: Finished difference Result 167 states and 179 transitions. [2020-10-15 00:06:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:06:23,830 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-15 00:06:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:23,831 INFO L225 Difference]: With dead ends: 167 [2020-10-15 00:06:23,832 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 00:06:23,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:06:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 00:06:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-15 00:06:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:06:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-15 00:06:23,837 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-15 00:06:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:23,838 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-15 00:06:23,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:06:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-15 00:06:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:06:23,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:23,839 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:23,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:06:23,839 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:23,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1106707364, now seen corresponding path program 31 times [2020-10-15 00:06:23,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:23,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126659350] [2020-10-15 00:06:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:24,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:24,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:06:24,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:25,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:25,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:25,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:25,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:25,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126659350] [2020-10-15 00:06:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:25,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:06:25,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358517267] [2020-10-15 00:06:25,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:06:25,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:06:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:06:25,586 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 34 states. [2020-10-15 00:06:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:26,891 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-15 00:06:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:06:26,891 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-15 00:06:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:26,892 INFO L225 Difference]: With dead ends: 171 [2020-10-15 00:06:26,892 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 00:06:26,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:06:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 00:06:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-10-15 00:06:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:06:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-15 00:06:26,897 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-15 00:06:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:26,898 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-15 00:06:26,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:06:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-15 00:06:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:06:26,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:26,899 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:26,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:06:26,899 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2055887782, now seen corresponding path program 32 times [2020-10-15 00:06:26,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:26,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157815478] [2020-10-15 00:06:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:26,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:27,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:27,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:06:27,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:06:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:28,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:28,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:28,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:28,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:28,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:28,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:28,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157815478] [2020-10-15 00:06:28,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:28,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:06:28,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231557495] [2020-10-15 00:06:28,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:06:28,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:06:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:06:28,876 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 35 states. [2020-10-15 00:06:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:30,249 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2020-10-15 00:06:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:06:30,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-15 00:06:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:30,251 INFO L225 Difference]: With dead ends: 175 [2020-10-15 00:06:30,251 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:06:30,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:06:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:06:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-15 00:06:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:06:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-15 00:06:30,257 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-15 00:06:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:30,257 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-15 00:06:30,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:06:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-15 00:06:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:06:30,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:30,258 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:30,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:06:30,259 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:30,259 INFO L82 PathProgramCache]: Analyzing trace with hash 609764568, now seen corresponding path program 33 times [2020-10-15 00:06:30,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:30,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742237608] [2020-10-15 00:06:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:30,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:06:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:31,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:06:31,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:32,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:32,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:32,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:32,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:32,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742237608] [2020-10-15 00:06:32,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:32,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:06:32,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332216697] [2020-10-15 00:06:32,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:06:32,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:06:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:06:32,103 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 36 states. [2020-10-15 00:06:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:33,563 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2020-10-15 00:06:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:06:33,564 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-15 00:06:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:33,565 INFO L225 Difference]: With dead ends: 179 [2020-10-15 00:06:33,565 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 00:06:33,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:06:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 00:06:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-10-15 00:06:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:06:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-15 00:06:33,571 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-15 00:06:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:33,571 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-15 00:06:33,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:06:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-15 00:06:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:06:33,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:33,572 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:33,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:06:33,573 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1793802794, now seen corresponding path program 34 times [2020-10-15 00:06:33,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:33,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041795642] [2020-10-15 00:06:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:34,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:06:34,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:35,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:35,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:35,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:35,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:35,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:35,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:35,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:35,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041795642] [2020-10-15 00:06:35,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:35,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:06:35,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579719359] [2020-10-15 00:06:35,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:06:35,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:06:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:06:35,336 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 37 states. [2020-10-15 00:06:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:36,879 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-15 00:06:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:06:36,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-15 00:06:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:36,880 INFO L225 Difference]: With dead ends: 183 [2020-10-15 00:06:36,880 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 00:06:36,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:06:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 00:06:36,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-10-15 00:06:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:06:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-15 00:06:36,886 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-15 00:06:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:36,886 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-15 00:06:36,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:06:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-15 00:06:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:06:36,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:36,887 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:36,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:06:36,888 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash -929632428, now seen corresponding path program 35 times [2020-10-15 00:06:36,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:36,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804646684] [2020-10-15 00:06:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:36,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:37,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:06:37,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:06:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:38,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:38,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:38,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:38,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:38,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:38,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:38,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804646684] [2020-10-15 00:06:38,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:38,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:06:38,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334034287] [2020-10-15 00:06:38,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:06:38,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:06:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:06:38,815 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 38 states. [2020-10-15 00:06:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:40,458 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-10-15 00:06:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:06:40,459 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-15 00:06:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:40,460 INFO L225 Difference]: With dead ends: 187 [2020-10-15 00:06:40,460 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 00:06:40,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:06:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 00:06:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-10-15 00:06:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:06:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-15 00:06:40,469 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-15 00:06:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:40,470 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-15 00:06:40,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:06:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-15 00:06:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:06:40,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:40,471 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:40,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:06:40,472 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash 609401170, now seen corresponding path program 36 times [2020-10-15 00:06:40,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:40,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756521770] [2020-10-15 00:06:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:40,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:42,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:42,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:06:42,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:42,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:06:42,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:43,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:43,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:43,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:43,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756521770] [2020-10-15 00:06:43,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:43,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:06:43,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856730325] [2020-10-15 00:06:43,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:06:43,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:06:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:06:43,511 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 39 states. [2020-10-15 00:06:45,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:45,233 INFO L93 Difference]: Finished difference Result 191 states and 203 transitions. [2020-10-15 00:06:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:06:45,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-15 00:06:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:45,234 INFO L225 Difference]: With dead ends: 191 [2020-10-15 00:06:45,234 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 00:06:45,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:06:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 00:06:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-15 00:06:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:06:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-15 00:06:45,240 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-15 00:06:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:45,241 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-15 00:06:45,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:06:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-15 00:06:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:06:45,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:45,242 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:45,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:06:45,242 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2143028272, now seen corresponding path program 37 times [2020-10-15 00:06:45,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:45,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219764164] [2020-10-15 00:06:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:45,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:46,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:46,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:06:46,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-15 00:06:46,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:46,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:06:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:06:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:47,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:47,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:47,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:47,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:47,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:47,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:06:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:47,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219764164] [2020-10-15 00:06:47,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:47,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:06:47,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524218948] [2020-10-15 00:06:47,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:06:47,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:06:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:06:47,337 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 40 states. [2020-10-15 00:06:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:49,136 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-15 00:06:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:06:49,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-15 00:06:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:49,137 INFO L225 Difference]: With dead ends: 195 [2020-10-15 00:06:49,137 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 00:06:49,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:06:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 00:06:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-15 00:06:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:06:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-15 00:06:49,145 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-15 00:06:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:49,145 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-15 00:06:49,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:06:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-15 00:06:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:06:49,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:49,148 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:49,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:06:49,149 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1527867698, now seen corresponding path program 38 times [2020-10-15 00:06:49,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:49,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35737705] [2020-10-15 00:06:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:50,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:06:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:50,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:06:50,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:51,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:51,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:51,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:51,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:51,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35737705] [2020-10-15 00:06:51,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:51,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:06:51,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171378480] [2020-10-15 00:06:51,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:06:51,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:06:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:06:51,249 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 41 states. [2020-10-15 00:06:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:53,190 INFO L93 Difference]: Finished difference Result 199 states and 211 transitions. [2020-10-15 00:06:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:06:53,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-15 00:06:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:53,192 INFO L225 Difference]: With dead ends: 199 [2020-10-15 00:06:53,192 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 00:06:53,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:06:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 00:06:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-15 00:06:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 00:06:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-15 00:06:53,199 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-15 00:06:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:53,200 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-15 00:06:53,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:06:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-15 00:06:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:06:53,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:53,201 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:53,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:06:53,201 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1230924364, now seen corresponding path program 39 times [2020-10-15 00:06:53,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:53,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391384519] [2020-10-15 00:06:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:53,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:54,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:54,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:06:54,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:54,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:06:54,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:55,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:55,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:55,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391384519] [2020-10-15 00:06:55,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:55,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:06:55,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248977428] [2020-10-15 00:06:55,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:06:55,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:06:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:06:55,422 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 42 states. [2020-10-15 00:06:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:57,436 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2020-10-15 00:06:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:06:57,436 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-15 00:06:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:57,437 INFO L225 Difference]: With dead ends: 203 [2020-10-15 00:06:57,437 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 00:06:57,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:06:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 00:06:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-10-15 00:06:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:06:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-15 00:06:57,445 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-15 00:06:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:57,445 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-15 00:06:57,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:06:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-15 00:06:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:06:57,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:57,447 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:57,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:06:57,447 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1859692982, now seen corresponding path program 40 times [2020-10-15 00:06:57,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:57,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378441002] [2020-10-15 00:06:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:57,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:59,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:06:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:06:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:06:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:01,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:01,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:01,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:01,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:01,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378441002] [2020-10-15 00:07:01,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:01,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:07:01,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260784784] [2020-10-15 00:07:01,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:07:01,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:07:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:07:01,114 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 43 states. [2020-10-15 00:07:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:03,224 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-15 00:07:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:07:03,228 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-15 00:07:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:03,229 INFO L225 Difference]: With dead ends: 207 [2020-10-15 00:07:03,230 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 00:07:03,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:07:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 00:07:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-10-15 00:07:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 00:07:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-15 00:07:03,236 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-15 00:07:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:03,237 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-15 00:07:03,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:07:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-15 00:07:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:07:03,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:03,238 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:03,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:07:03,238 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash 174406344, now seen corresponding path program 41 times [2020-10-15 00:07:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:03,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883604272] [2020-10-15 00:07:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1983 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:07:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:07:05,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:06,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:06,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:06,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:06,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:06,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:06,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:06,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:06,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:06,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:06,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:06,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883604272] [2020-10-15 00:07:06,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:06,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:07:06,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527018289] [2020-10-15 00:07:06,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:07:06,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:07:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:07:06,634 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 44 states. [2020-10-15 00:07:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:08,837 INFO L93 Difference]: Finished difference Result 211 states and 223 transitions. [2020-10-15 00:07:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:07:08,838 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-15 00:07:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:08,839 INFO L225 Difference]: With dead ends: 211 [2020-10-15 00:07:08,840 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 00:07:08,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:07:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 00:07:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-10-15 00:07:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 00:07:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-15 00:07:08,846 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-15 00:07:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:08,846 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-15 00:07:08,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:07:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-15 00:07:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-15 00:07:08,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:08,847 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:08,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:07:08,847 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash 733738950, now seen corresponding path program 42 times [2020-10-15 00:07:08,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:08,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308547449] [2020-10-15 00:07:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:10,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:10,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-15 00:07:10,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:10,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-15 00:07:10,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:10,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:07:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:10,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-15 00:07:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:11,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:11,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:11,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:11,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:11,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:11,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:11,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:11,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:11,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:11,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308547449] [2020-10-15 00:07:11,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:11,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:07:11,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012886616] [2020-10-15 00:07:11,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:07:11,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:11,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:07:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:07:11,743 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 45 states. [2020-10-15 00:07:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:14,081 INFO L93 Difference]: Finished difference Result 215 states and 227 transitions. [2020-10-15 00:07:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:07:14,085 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-15 00:07:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:14,086 INFO L225 Difference]: With dead ends: 215 [2020-10-15 00:07:14,086 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 00:07:14,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:07:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 00:07:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-10-15 00:07:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 00:07:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-15 00:07:14,092 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-15 00:07:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:14,093 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-15 00:07:14,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:07:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-15 00:07:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 00:07:14,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:14,094 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:14,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:07:14,094 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1381461316, now seen corresponding path program 43 times [2020-10-15 00:07:14,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:14,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034308004] [2020-10-15 00:07:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:15,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:15,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 00:07:15,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-15 00:07:15,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:17,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:17,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:17,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:17,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:17,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:17,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:17,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:17,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:17,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:17,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:17,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:17,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034308004] [2020-10-15 00:07:17,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:17,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:07:17,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106677603] [2020-10-15 00:07:17,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:07:17,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:07:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:07:17,429 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 46 states. [2020-10-15 00:07:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:19,903 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-15 00:07:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:07:19,904 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-15 00:07:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:19,905 INFO L225 Difference]: With dead ends: 219 [2020-10-15 00:07:19,905 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 00:07:19,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:07:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 00:07:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-10-15 00:07:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:07:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-15 00:07:19,911 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-15 00:07:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:19,911 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-15 00:07:19,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:07:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-15 00:07:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 00:07:19,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:19,912 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:19,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:07:19,912 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1072397122, now seen corresponding path program 44 times [2020-10-15 00:07:19,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:19,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471615656] [2020-10-15 00:07:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:22,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:22,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 00:07:22,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:07:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2103 [2020-10-15 00:07:22,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:22,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:07:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-15 00:07:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:23,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:23,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:23,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:23,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:23,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:23,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:23,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471615656] [2020-10-15 00:07:23,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:23,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:07:23,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115739589] [2020-10-15 00:07:23,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:07:23,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:23,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:07:23,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:07:23,620 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 47 states. [2020-10-15 00:07:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:26,170 INFO L93 Difference]: Finished difference Result 223 states and 235 transitions. [2020-10-15 00:07:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:07:26,171 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-15 00:07:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:26,172 INFO L225 Difference]: With dead ends: 223 [2020-10-15 00:07:26,172 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 00:07:26,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:07:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 00:07:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-15 00:07:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 00:07:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-15 00:07:26,178 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-15 00:07:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:26,179 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-15 00:07:26,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:07:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-15 00:07:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 00:07:26,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:26,180 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:26,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:07:26,180 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:26,180 INFO L82 PathProgramCache]: Analyzing trace with hash 414450112, now seen corresponding path program 45 times [2020-10-15 00:07:26,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:26,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628210354] [2020-10-15 00:07:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:27,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:27,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 00:07:27,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-15 00:07:27,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:27,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:07:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:27,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-15 00:07:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:29,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:29,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628210354] [2020-10-15 00:07:29,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:29,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:07:29,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440809639] [2020-10-15 00:07:29,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:07:29,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:07:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:07:29,458 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 48 states. [2020-10-15 00:07:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:32,132 INFO L93 Difference]: Finished difference Result 227 states and 239 transitions. [2020-10-15 00:07:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:07:32,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-15 00:07:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:32,134 INFO L225 Difference]: With dead ends: 227 [2020-10-15 00:07:32,134 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 00:07:32,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:07:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 00:07:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2020-10-15 00:07:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 00:07:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-15 00:07:32,141 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-15 00:07:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:32,142 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-15 00:07:32,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:07:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-15 00:07:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 00:07:32,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:32,152 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:32,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:07:32,153 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -512433986, now seen corresponding path program 46 times [2020-10-15 00:07:32,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:32,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163667437] [2020-10-15 00:07:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:34,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:34,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-15 00:07:34,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1988 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-15 00:07:34,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:35,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:35,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:35,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:35,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:35,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163667437] [2020-10-15 00:07:35,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:35,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:07:35,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541242945] [2020-10-15 00:07:35,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:07:35,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:07:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:07:35,880 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 49 states. [2020-10-15 00:07:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:38,718 INFO L93 Difference]: Finished difference Result 231 states and 243 transitions. [2020-10-15 00:07:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:07:38,719 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-15 00:07:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:38,720 INFO L225 Difference]: With dead ends: 231 [2020-10-15 00:07:38,720 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 00:07:38,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:07:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 00:07:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2020-10-15 00:07:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 00:07:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2020-10-15 00:07:38,726 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2020-10-15 00:07:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:38,726 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2020-10-15 00:07:38,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:07:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2020-10-15 00:07:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 00:07:38,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:38,727 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:38,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:07:38,727 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2105145404, now seen corresponding path program 47 times [2020-10-15 00:07:38,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:38,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579939314] [2020-10-15 00:07:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:38,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:40,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:40,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-15 00:07:40,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:40,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-15 00:07:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:41,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:41,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:41,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:41,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:41,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:42,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579939314] [2020-10-15 00:07:42,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:42,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:07:42,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420440291] [2020-10-15 00:07:42,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:07:42,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:42,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:07:42,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:07:42,006 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 50 states. [2020-10-15 00:07:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:44,872 INFO L93 Difference]: Finished difference Result 235 states and 247 transitions. [2020-10-15 00:07:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:07:44,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-15 00:07:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:44,875 INFO L225 Difference]: With dead ends: 235 [2020-10-15 00:07:44,875 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 00:07:44,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:07:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 00:07:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-15 00:07:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 00:07:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-15 00:07:44,882 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 108 [2020-10-15 00:07:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:44,882 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-15 00:07:44,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:07:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-15 00:07:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-15 00:07:44,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:44,883 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:44,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:07:44,884 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 748103738, now seen corresponding path program 48 times [2020-10-15 00:07:44,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:44,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596834265] [2020-10-15 00:07:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:07:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-15 00:07:47,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:49,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:49,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:49,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:49,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:49,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:49,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596834265] [2020-10-15 00:07:49,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:49,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:07:49,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82144319] [2020-10-15 00:07:49,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:07:49,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:07:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:07:49,151 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 51 states. [2020-10-15 00:07:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:52,153 INFO L93 Difference]: Finished difference Result 239 states and 251 transitions. [2020-10-15 00:07:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:07:52,153 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-15 00:07:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:52,155 INFO L225 Difference]: With dead ends: 239 [2020-10-15 00:07:52,155 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 00:07:52,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:07:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 00:07:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-10-15 00:07:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:07:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-10-15 00:07:52,160 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 110 [2020-10-15 00:07:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:52,161 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-10-15 00:07:52,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:07:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-10-15 00:07:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-15 00:07:52,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:52,162 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:52,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:07:52,162 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1993846600, now seen corresponding path program 49 times [2020-10-15 00:07:52,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:52,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182907553] [2020-10-15 00:07:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:52,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2383 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-15 00:07:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:56,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:56,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:56,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:56,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182907553] [2020-10-15 00:07:56,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:56,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:07:56,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667626431] [2020-10-15 00:07:56,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:07:56,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:56,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:07:56,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:07:56,512 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 52 states. [2020-10-15 00:07:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:59,703 INFO L93 Difference]: Finished difference Result 243 states and 255 transitions. [2020-10-15 00:07:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:07:59,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-15 00:07:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:59,707 INFO L225 Difference]: With dead ends: 243 [2020-10-15 00:07:59,707 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 00:07:59,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:07:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 00:07:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-10-15 00:07:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 00:07:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-10-15 00:07:59,712 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 112 [2020-10-15 00:07:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:59,713 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-10-15 00:07:59,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:07:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-10-15 00:07:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-15 00:07:59,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:59,713 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:59,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:07:59,714 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 101798326, now seen corresponding path program 50 times [2020-10-15 00:07:59,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:59,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277548084] [2020-10-15 00:07:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:59,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2272 [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:02,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:08:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-15 00:08:02,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:04,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:04,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:04,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:04,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:04,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:04,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:04,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277548084] [2020-10-15 00:08:04,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:04,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:08:04,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165000877] [2020-10-15 00:08:04,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:08:04,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:04,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:08:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:08:04,037 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 53 states. [2020-10-15 00:08:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:07,255 INFO L93 Difference]: Finished difference Result 247 states and 259 transitions. [2020-10-15 00:08:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:08:07,256 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-15 00:08:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:07,257 INFO L225 Difference]: With dead ends: 247 [2020-10-15 00:08:07,257 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 00:08:07,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:08:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 00:08:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2020-10-15 00:08:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 00:08:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-15 00:08:07,264 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 114 [2020-10-15 00:08:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:07,265 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-15 00:08:07,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:08:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-15 00:08:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-15 00:08:07,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:07,267 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:07,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:08:07,267 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -323089612, now seen corresponding path program 51 times [2020-10-15 00:08:07,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:07,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435228985] [2020-10-15 00:08:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:10,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:10,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2712 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-15 00:08:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:12,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:12,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:12,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:12,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:12,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435228985] [2020-10-15 00:08:12,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:12,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:08:12,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287945237] [2020-10-15 00:08:12,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:08:12,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:12,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:08:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:08:12,112 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 54 states. [2020-10-15 00:08:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:15,437 INFO L93 Difference]: Finished difference Result 251 states and 263 transitions. [2020-10-15 00:08:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:08:15,438 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-15 00:08:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:15,439 INFO L225 Difference]: With dead ends: 251 [2020-10-15 00:08:15,439 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 00:08:15,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:08:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 00:08:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-10-15 00:08:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 00:08:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2020-10-15 00:08:15,445 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 116 [2020-10-15 00:08:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:15,446 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2020-10-15 00:08:15,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:08:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2020-10-15 00:08:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-15 00:08:15,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:15,447 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:15,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:08:15,447 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -618504910, now seen corresponding path program 52 times [2020-10-15 00:08:15,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:15,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173053827] [2020-10-15 00:08:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:15,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:17,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3746 [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:19,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:08:19,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:19,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-15 00:08:19,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:21,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:21,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:21,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:21,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:21,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:21,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:21,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:21,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:21,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173053827] [2020-10-15 00:08:21,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:21,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:08:21,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265682669] [2020-10-15 00:08:21,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:08:21,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:21,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:08:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:08:21,399 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 55 states. [2020-10-15 00:08:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:24,816 INFO L93 Difference]: Finished difference Result 255 states and 267 transitions. [2020-10-15 00:08:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:08:24,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-15 00:08:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:24,817 INFO L225 Difference]: With dead ends: 255 [2020-10-15 00:08:24,818 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 00:08:24,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:08:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 00:08:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2020-10-15 00:08:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-15 00:08:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-15 00:08:24,824 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 118 [2020-10-15 00:08:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:24,825 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-15 00:08:24,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:08:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-15 00:08:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-15 00:08:24,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:24,826 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:24,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:08:24,826 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:24,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1044764752, now seen corresponding path program 53 times [2020-10-15 00:08:24,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:24,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011594960] [2020-10-15 00:08:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:26,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:26,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:08:26,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:26,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-15 00:08:26,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:29,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:29,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:29,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:29,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:29,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011594960] [2020-10-15 00:08:29,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:29,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:08:29,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459490884] [2020-10-15 00:08:29,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:08:29,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:08:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:08:29,167 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 56 states. [2020-10-15 00:08:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:32,673 INFO L93 Difference]: Finished difference Result 259 states and 271 transitions. [2020-10-15 00:08:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:08:32,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-15 00:08:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:32,675 INFO L225 Difference]: With dead ends: 259 [2020-10-15 00:08:32,675 INFO L226 Difference]: Without dead ends: 137 [2020-10-15 00:08:32,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:08:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-15 00:08:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2020-10-15 00:08:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 00:08:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-15 00:08:32,681 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 120 [2020-10-15 00:08:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:32,681 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-15 00:08:32,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:08:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-15 00:08:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-15 00:08:32,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:32,682 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:32,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:08:32,683 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:32,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1636387502, now seen corresponding path program 54 times [2020-10-15 00:08:32,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:32,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805237583] [2020-10-15 00:08:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:32,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:36,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3570 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-15 00:08:36,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:38,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:38,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:38,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:38,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:38,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:38,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805237583] [2020-10-15 00:08:38,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:38,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:08:38,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152225006] [2020-10-15 00:08:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:08:38,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:08:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:08:38,639 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 57 states. [2020-10-15 00:08:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:42,323 INFO L93 Difference]: Finished difference Result 263 states and 275 transitions. [2020-10-15 00:08:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:08:42,323 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-15 00:08:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:42,325 INFO L225 Difference]: With dead ends: 263 [2020-10-15 00:08:42,325 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 00:08:42,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:08:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 00:08:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-15 00:08:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-15 00:08:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-10-15 00:08:42,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 122 [2020-10-15 00:08:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:42,331 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-10-15 00:08:42,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:08:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-10-15 00:08:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-15 00:08:42,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:42,333 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:42,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:08:42,333 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1243325996, now seen corresponding path program 55 times [2020-10-15 00:08:42,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:42,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693491000] [2020-10-15 00:08:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:42,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:45,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:45,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-15 00:08:45,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:45,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2952 [2020-10-15 00:08:45,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:45,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:08:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:45,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-15 00:08:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:47,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:47,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:47,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:47,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:47,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693491000] [2020-10-15 00:08:47,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:47,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:08:47,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401379648] [2020-10-15 00:08:47,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:08:47,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:47,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:08:47,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:08:47,741 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 58 states. [2020-10-15 00:08:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:51,574 INFO L93 Difference]: Finished difference Result 267 states and 279 transitions. [2020-10-15 00:08:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:08:51,575 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-15 00:08:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:51,576 INFO L225 Difference]: With dead ends: 267 [2020-10-15 00:08:51,576 INFO L226 Difference]: Without dead ends: 141 [2020-10-15 00:08:51,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:08:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-15 00:08:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2020-10-15 00:08:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 00:08:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-10-15 00:08:51,581 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 124 [2020-10-15 00:08:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:51,581 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-10-15 00:08:51,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:08:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-10-15 00:08:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-15 00:08:51,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:51,582 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:51,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:08:51,583 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1468340778, now seen corresponding path program 56 times [2020-10-15 00:08:51,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:51,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665197415] [2020-10-15 00:08:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:56,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-15 00:08:56,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:59,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:59,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:59,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:59,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:08:59,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:59,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:59,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:59,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:59,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665197415] [2020-10-15 00:08:59,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:59,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:08:59,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936953955] [2020-10-15 00:08:59,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:08:59,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:59,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:08:59,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:08:59,166 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 59 states. [2020-10-15 00:09:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:03,020 INFO L93 Difference]: Finished difference Result 271 states and 283 transitions. [2020-10-15 00:09:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:09:03,020 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-15 00:09:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:03,021 INFO L225 Difference]: With dead ends: 271 [2020-10-15 00:09:03,021 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 00:09:03,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:09:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 00:09:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2020-10-15 00:09:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 00:09:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-15 00:09:03,028 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 126 [2020-10-15 00:09:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:03,028 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-15 00:09:03,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:09:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-15 00:09:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-15 00:09:03,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:03,030 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:03,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:09:03,030 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1335785816, now seen corresponding path program 57 times [2020-10-15 00:09:03,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:03,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259979283] [2020-10-15 00:09:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:03,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2893 [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:05,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:09:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:09:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-15 00:09:05,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:08,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:08,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:08,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:08,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259979283] [2020-10-15 00:09:08,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:08,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:09:08,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117103787] [2020-10-15 00:09:08,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:09:08,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:09:08,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:09:08,571 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 60 states. [2020-10-15 00:09:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:12,740 INFO L93 Difference]: Finished difference Result 275 states and 287 transitions. [2020-10-15 00:09:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:09:12,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-15 00:09:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:12,744 INFO L225 Difference]: With dead ends: 275 [2020-10-15 00:09:12,744 INFO L226 Difference]: Without dead ends: 145 [2020-10-15 00:09:12,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:09:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-15 00:09:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2020-10-15 00:09:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 00:09:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2020-10-15 00:09:12,750 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 128 [2020-10-15 00:09:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:12,751 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2020-10-15 00:09:12,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:09:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2020-10-15 00:09:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-15 00:09:12,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:12,752 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:12,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:09:12,752 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1138019238, now seen corresponding path program 58 times [2020-10-15 00:09:12,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:12,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855930318] [2020-10-15 00:09:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3992 [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:16,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:09:16,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:09:16,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-15 00:09:16,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:19,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:19,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:19,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855930318] [2020-10-15 00:09:19,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:19,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-15 00:09:19,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807637629] [2020-10-15 00:09:19,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-15 00:09:19,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-15 00:09:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:09:19,491 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 61 states. [2020-10-15 00:09:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:23,654 INFO L93 Difference]: Finished difference Result 279 states and 291 transitions. [2020-10-15 00:09:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-15 00:09:23,655 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-15 00:09:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:23,656 INFO L225 Difference]: With dead ends: 279 [2020-10-15 00:09:23,657 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 00:09:23,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:09:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 00:09:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-10-15 00:09:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 00:09:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2020-10-15 00:09:23,663 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 130 [2020-10-15 00:09:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:23,663 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2020-10-15 00:09:23,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-15 00:09:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2020-10-15 00:09:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-15 00:09:23,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:23,664 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:23,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:09:23,664 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash -947205852, now seen corresponding path program 59 times [2020-10-15 00:09:23,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:23,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565382441] [2020-10-15 00:09:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3178 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:09:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-15 00:09:26,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:29,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:29,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:29,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565382441] [2020-10-15 00:09:29,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:29,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:09:29,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978990028] [2020-10-15 00:09:29,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:09:29,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:09:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:09:29,705 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 62 states. [2020-10-15 00:09:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:33,992 INFO L93 Difference]: Finished difference Result 283 states and 295 transitions. [2020-10-15 00:09:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:09:33,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-15 00:09:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:33,995 INFO L225 Difference]: With dead ends: 283 [2020-10-15 00:09:33,995 INFO L226 Difference]: Without dead ends: 149 [2020-10-15 00:09:33,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:09:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-15 00:09:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-10-15 00:09:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 00:09:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-15 00:09:34,000 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 132 [2020-10-15 00:09:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:34,001 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-15 00:09:34,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:09:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-15 00:09:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-15 00:09:34,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:34,001 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:34,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:09:34,002 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash 901209890, now seen corresponding path program 60 times [2020-10-15 00:09:34,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:34,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677618757] [2020-10-15 00:09:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:34,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking...