/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=BIGGEST --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/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:18:33,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:18:33,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:18:33,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:18:33,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:18:33,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:18:33,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:18:33,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:18:33,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:18:33,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:18:33,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:18:33,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:18:33,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:18:33,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:18:33,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:18:33,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:18:33,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:18:33,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:18:33,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:18:33,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:18:33,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:18:33,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:18:33,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:18:33,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:18:33,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:18:33,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:18:33,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:18:33,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:18:33,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:18:33,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:18:33,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:18:33,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:18:33,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:18:33,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:18:33,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:18:33,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:18:33,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:18:33,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:18:33,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:18:33,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:18:33,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:18:33,673 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 [2020-10-12 16:18:33,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:18:33,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:18:33,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:18:33,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:18:33,695 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:18:33,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:18:33,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:18:33,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:18:33,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:18:33,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:18:33,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:18:33,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:18:33,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:18:33,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:18:33,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:18:33,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:18:33,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:18:33,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:18:33,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:18:33,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:18:33,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:18:33,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:18:33,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:18:33,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:18:33,700 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:18:33,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:18:33,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:18:33,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:18:33,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:18:33,983 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:18:33,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-12 16:18:34,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/623f2e4f8/34911b8ced9f4f4991e7d6f7a60e803e/FLAG04f7d4447 [2020-10-12 16:18:34,475 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:18:34,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2020-10-12 16:18:34,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/623f2e4f8/34911b8ced9f4f4991e7d6f7a60e803e/FLAG04f7d4447 [2020-10-12 16:18:34,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/623f2e4f8/34911b8ced9f4f4991e7d6f7a60e803e [2020-10-12 16:18:34,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:18:34,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:18:34,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:18:34,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:18:34,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:18:34,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:18:34" (1/1) ... [2020-10-12 16:18:34,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a7ca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:34, skipping insertion in model container [2020-10-12 16:18:34,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:18:34" (1/1) ... [2020-10-12 16:18:34,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:18:34,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:18:35,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:18:35,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:18:35,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:18:35,137 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:18:35,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35 WrapperNode [2020-10-12 16:18:35,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:18:35,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:18:35,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:18:35,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:18:35,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (1/1) ... [2020-10-12 16:18:35,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:18:35,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:18:35,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:18:35,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:18:35,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (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 [2020-10-12 16:18:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:18:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:18:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:18:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:18:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:18:35,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:18:35,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:18:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:18:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:18:35,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:18:35,498 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 16:18:35,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:18:35 BoogieIcfgContainer [2020-10-12 16:18:35,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:18:35,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:18:35,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:18:35,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:18:35,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:18:34" (1/3) ... [2020-10-12 16:18:35,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a62294a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:18:35, skipping insertion in model container [2020-10-12 16:18:35,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:18:35" (2/3) ... [2020-10-12 16:18:35,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a62294a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:18:35, skipping insertion in model container [2020-10-12 16:18:35,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:18:35" (3/3) ... [2020-10-12 16:18:35,510 INFO L109 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2020-10-12 16:18:35,522 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:18:35,531 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:18:35,546 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:18:35,570 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:18:35,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:18:35,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:18:35,571 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:18:35,571 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:18:35,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:18:35,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:18:35,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:18:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-12 16:18:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:18:35,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:35,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:35,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:35,602 INFO L82 PathProgramCache]: Analyzing trace with hash -557519811, now seen corresponding path program 1 times [2020-10-12 16:18:35,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:35,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466791587] [2020-10-12 16:18:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:35,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:35,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:18:35,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:35,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-12 16:18:35,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:18:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:35,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:18:35,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:18:36,190 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:18:36,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:36,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:36,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:18:36,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:36,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466791587] [2020-10-12 16:18:36,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:18:36,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:18:36,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336756630] [2020-10-12 16:18:36,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:18:36,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:36,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:18:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:18:36,274 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-10-12 16:18:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:36,378 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2020-10-12 16:18:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:18:36,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:18:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:36,392 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:18:36,392 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:18:36,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:18:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:18:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-10-12 16:18:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:18:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-12 16:18:36,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2020-10-12 16:18:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:36,439 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-12 16:18:36,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:18:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-12 16:18:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:18:36,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:36,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:36,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:18:36,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1005021419, now seen corresponding path program 1 times [2020-10-12 16:18:36,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:36,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8370507] [2020-10-12 16:18:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:36,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:18:36,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-12 16:18:36,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:18:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:18:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:18:36,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:18:36,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:36,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8370507] [2020-10-12 16:18:36,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:18:36,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:18:36,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110981456] [2020-10-12 16:18:36,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:18:36,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:36,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:18:36,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:18:36,833 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-10-12 16:18:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:36,906 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-12 16:18:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:18:36,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-12 16:18:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:36,909 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:18:36,922 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:18:36,926 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 [2020-10-12 16:18:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:18:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2020-10-12 16:18:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:18:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-12 16:18:36,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2020-10-12 16:18:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:36,937 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-12 16:18:36,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:18:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-12 16:18:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:18:36,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:36,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:36,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:18:36,939 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1066437398, now seen corresponding path program 1 times [2020-10-12 16:18:36,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:36,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426028390] [2020-10-12 16:18:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:37,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:37,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:18:37,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:37,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 16:18:37,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:18:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:18:37,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:39,203 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-10-12 16:18:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:39,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:18:39,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:39,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:39,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426028390] [2020-10-12 16:18:39,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:18:39,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:18:39,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970207068] [2020-10-12 16:18:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:18:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:18:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:18:39,250 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-10-12 16:18:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:39,340 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-12 16:18:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:18:39,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-12 16:18:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:39,345 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:18:39,345 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:18:39,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:18:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:18:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-10-12 16:18:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:18:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-12 16:18:39,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 12 [2020-10-12 16:18:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:39,363 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-12 16:18:39,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:18:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-12 16:18:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:18:39,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:39,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:39,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:18:39,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1326481591, now seen corresponding path program 1 times [2020-10-12 16:18:39,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:39,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464769365] [2020-10-12 16:18:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:18:39,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 16:18:39,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:18:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:39,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:18:39,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:39,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:39,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:39,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:39,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:39,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464769365] [2020-10-12 16:18:39,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:39,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:18:39,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815846533] [2020-10-12 16:18:39,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:18:39,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:18:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:18:39,473 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-12 16:18:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:39,501 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-10-12 16:18:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:18:39,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 16:18:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:39,503 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:18:39,503 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:18:39,504 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 [2020-10-12 16:18:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:18:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-10-12 16:18:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:18:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-12 16:18:39,512 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 13 [2020-10-12 16:18:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:39,513 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-12 16:18:39,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:18:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-12 16:18:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:18:39,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:39,514 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:39,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:18:39,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1802441078, now seen corresponding path program 2 times [2020-10-12 16:18:39,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:39,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426192590] [2020-10-12 16:18:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:18:39,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-12 16:18:39,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:18:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:18:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:18:39,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:39,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:39,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:39,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:39,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426192590] [2020-10-12 16:18:39,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:39,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:18:39,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538716632] [2020-10-12 16:18:39,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:18:39,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:18:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:18:39,691 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-10-12 16:18:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:39,737 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-12 16:18:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:18:39,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 16:18:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:39,740 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:18:39,740 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:18:39,741 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 [2020-10-12 16:18:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:18:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-12 16:18:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:18:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-12 16:18:39,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2020-10-12 16:18:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:39,761 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-12 16:18:39,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:18:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-12 16:18:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:18:39,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:39,763 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:39,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:18:39,765 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash -14796009, now seen corresponding path program 3 times [2020-10-12 16:18:39,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:39,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997655803] [2020-10-12 16:18:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:18:39,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:39,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 16:18:39,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:18:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:39,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:18:39,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:40,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:40,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:40,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:40,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:40,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:40,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:40,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:40,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:40,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:40,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997655803] [2020-10-12 16:18:40,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:40,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:18:40,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682619157] [2020-10-12 16:18:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:18:40,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:18:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:18:40,035 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-10-12 16:18:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:40,091 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-12 16:18:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:18:40,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-12 16:18:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:40,095 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:18:40,095 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:18:40,100 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 [2020-10-12 16:18:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:18:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-12 16:18:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:18:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-12 16:18:40,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2020-10-12 16:18:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:40,112 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-12 16:18:40,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:18:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-12 16:18:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:18:40,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:40,119 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:40,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:18:40,120 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:40,120 INFO L82 PathProgramCache]: Analyzing trace with hash -432373718, now seen corresponding path program 4 times [2020-10-12 16:18:40,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:40,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546306546] [2020-10-12 16:18:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:40,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:40,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:40,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:18:40,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:40,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 16:18:40,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:18:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:40,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:18:40,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,015 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-10-12 16:18:42,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:42,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:42,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:42,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:42,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546306546] [2020-10-12 16:18:42,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:42,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:18:42,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571863536] [2020-10-12 16:18:42,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:18:42,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:18:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:18:42,051 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-10-12 16:18:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:42,167 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-12 16:18:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:18:42,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-12 16:18:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:42,169 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:18:42,169 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:18:42,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:18:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:18:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-12 16:18:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:18:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-12 16:18:42,178 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2020-10-12 16:18:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:42,178 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-12 16:18:42,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:18:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-12 16:18:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:18:42,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:42,179 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:42,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:18:42,180 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 513830110, now seen corresponding path program 1 times [2020-10-12 16:18:42,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:42,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991034841] [2020-10-12 16:18:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:18:42,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 16:18:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:18:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:42,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:18:42,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:18:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:18:42,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 16:18:42,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:18:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:18:42,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:42,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991034841] [2020-10-12 16:18:42,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:42,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:18:42,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216242762] [2020-10-12 16:18:42,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:18:42,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:18:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:18:42,340 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-12 16:18:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:42,373 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2020-10-12 16:18:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:18:42,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-12 16:18:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:42,376 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:18:42,376 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:18:42,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:18:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:18:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-12 16:18:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:18:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-12 16:18:42,388 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 18 [2020-10-12 16:18:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:42,388 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-12 16:18:42,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:18:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-12 16:18:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:18:42,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:42,389 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:42,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:18:42,390 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash -492380809, now seen corresponding path program 5 times [2020-10-12 16:18:42,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:42,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229757900] [2020-10-12 16:18:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:18:42,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 16:18:42,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:18:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:18:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-12 16:18:42,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:42,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:42,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:42,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229757900] [2020-10-12 16:18:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:18:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994241876] [2020-10-12 16:18:42,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:18:42,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:18:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:18:42,613 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 8 states. [2020-10-12 16:18:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:42,665 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2020-10-12 16:18:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:18:42,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-12 16:18:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:42,667 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:18:42,667 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:18:42,668 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 [2020-10-12 16:18:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:18:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-12 16:18:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:18:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-12 16:18:42,677 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 17 [2020-10-12 16:18:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:42,677 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-12 16:18:42,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:18:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-12 16:18:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:18:42,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:42,678 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:42,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:18:42,679 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1942366666, now seen corresponding path program 6 times [2020-10-12 16:18:42,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:42,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774169058] [2020-10-12 16:18:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:18:42,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-12 16:18:42,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:18:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:18:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:42,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:42,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:42,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:42,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774169058] [2020-10-12 16:18:42,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:42,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:18:42,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736361035] [2020-10-12 16:18:42,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:18:42,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:18:42,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:18:42,923 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 9 states. [2020-10-12 16:18:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:42,986 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-12 16:18:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:18:42,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-12 16:18:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:42,987 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:18:42,988 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:18:42,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:18:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:18:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-12 16:18:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:18:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-12 16:18:42,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 18 [2020-10-12 16:18:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:42,997 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-12 16:18:42,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:18:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-12 16:18:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:18:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:42,999 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:42,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:18:42,999 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash 110127063, now seen corresponding path program 7 times [2020-10-12 16:18:43,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:43,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943892836] [2020-10-12 16:18:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:43,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:18:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 16:18:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:18:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:43,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:18:43,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:43,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:43,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:43,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:43,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:43,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:43,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:43,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:43,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943892836] [2020-10-12 16:18:43,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:43,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:18:43,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591340338] [2020-10-12 16:18:43,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:18:43,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:18:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:18:43,306 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 10 states. [2020-10-12 16:18:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:43,384 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2020-10-12 16:18:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:18:43,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-12 16:18:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:43,385 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:18:43,385 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:18:43,386 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 [2020-10-12 16:18:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:18:43,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-12 16:18:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:18:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-12 16:18:43,396 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2020-10-12 16:18:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:43,396 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-12 16:18:43,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:18:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-12 16:18:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:18:43,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:43,398 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:18:43,398 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash -854725782, now seen corresponding path program 8 times [2020-10-12 16:18:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:43,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82984830] [2020-10-12 16:18:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:43,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:18:43,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:43,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-12 16:18:43,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:18:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:43,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:18:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:43,985 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 18 [2020-10-12 16:18:44,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:44,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:44,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:44,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:44,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:44,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:44,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:44,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:44,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:44,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82984830] [2020-10-12 16:18:44,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:44,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:18:44,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366294336] [2020-10-12 16:18:44,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:18:44,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:18:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:18:44,058 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 13 states. [2020-10-12 16:18:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:44,267 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2020-10-12 16:18:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:18:44,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-12 16:18:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:44,269 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:18:44,269 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:18:44,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:18:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:18:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-10-12 16:18:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:18:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-12 16:18:44,291 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 20 [2020-10-12 16:18:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:44,292 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-12 16:18:44,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:18:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-12 16:18:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:18:44,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:44,297 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:44,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:18:44,297 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -700392905, now seen corresponding path program 9 times [2020-10-12 16:18:44,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:44,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136866188] [2020-10-12 16:18:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:44,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:44,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:44,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:18:44,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:44,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-12 16:18:44,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:18:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:18:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:44,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:44,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:44,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:44,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:44,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:44,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:44,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:44,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136866188] [2020-10-12 16:18:44,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:44,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:18:44,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124863508] [2020-10-12 16:18:44,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:18:44,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:44,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:18:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:18:44,749 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 12 states. [2020-10-12 16:18:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:44,854 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2020-10-12 16:18:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:18:44,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-12 16:18:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:44,857 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:18:44,857 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:18:44,857 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 [2020-10-12 16:18:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:18:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-10-12 16:18:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:18:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-12 16:18:44,873 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 21 [2020-10-12 16:18:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:44,873 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-12 16:18:44,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:18:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-12 16:18:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:18:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:44,875 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:44,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:18:44,876 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash -211041014, now seen corresponding path program 10 times [2020-10-12 16:18:44,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:44,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231862722] [2020-10-12 16:18:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:44,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:45,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:45,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:18:45,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:18:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:45,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:45,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:45,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:45,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:45,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:45,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:45,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:45,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:45,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:18:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:45,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231862722] [2020-10-12 16:18:45,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:45,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:18:45,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104676592] [2020-10-12 16:18:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:18:45,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:18:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:18:45,275 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 13 states. [2020-10-12 16:18:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:45,388 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-12 16:18:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:18:45,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-12 16:18:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:45,389 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:18:45,389 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:18:45,390 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 [2020-10-12 16:18:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:18:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-12 16:18:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:18:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 16:18:45,399 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 22 [2020-10-12 16:18:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:45,399 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 16:18:45,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:18:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 16:18:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:18:45,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:45,400 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:45,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:18:45,401 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:45,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:45,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2073965719, now seen corresponding path program 11 times [2020-10-12 16:18:45,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:45,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002540419] [2020-10-12 16:18:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:45,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:45,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:45,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:18:45,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-12 16:18:45,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:18:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:45,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:18:45,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:45,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:45,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:45,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:45,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:45,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:45,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:45,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:45,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:45,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:45,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:45,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002540419] [2020-10-12 16:18:45,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:45,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:18:45,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262210834] [2020-10-12 16:18:45,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:18:45,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:18:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:18:45,906 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 14 states. [2020-10-12 16:18:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:46,033 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-12 16:18:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:18:46,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-12 16:18:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:46,035 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:18:46,035 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:18:46,036 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 [2020-10-12 16:18:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:18:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-12 16:18:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:18:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-12 16:18:46,045 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 23 [2020-10-12 16:18:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:46,045 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-12 16:18:46,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:18:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-12 16:18:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:18:46,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:46,047 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:46,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:18:46,047 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:46,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1704555361, now seen corresponding path program 2 times [2020-10-12 16:18:46,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:46,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043474787] [2020-10-12 16:18:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:18:46,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:18:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-12 16:18:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:18:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:18:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:48,864 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 63 DAG size of output: 12 [2020-10-12 16:18:48,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:48,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:48,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:48,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:48,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:48,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:48,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:48,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:18:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:48,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:48,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:18:48,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:18:48,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:18:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:18:48,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:48,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:18:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:48,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:48,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:48,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:18:48,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:48,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:18:48,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:48,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:18:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:48,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:18:48,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:18:48,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043474787] [2020-10-12 16:18:48,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:48,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:18:48,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020299797] [2020-10-12 16:18:48,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:18:48,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:18:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:18:48,912 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 7 states. [2020-10-12 16:18:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:49,025 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-10-12 16:18:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:18:49,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-12 16:18:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:49,027 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:18:49,027 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:18:49,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:18:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:18:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2020-10-12 16:18:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:18:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-12 16:18:49,040 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 26 [2020-10-12 16:18:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:49,041 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-12 16:18:49,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:18:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-12 16:18:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:18:49,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:49,042 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:49,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:18:49,042 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash -105269590, now seen corresponding path program 12 times [2020-10-12 16:18:49,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:49,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570097972] [2020-10-12 16:18:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:49,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:49,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:49,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:18:49,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:49,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-12 16:18:49,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:49,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:18:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:49,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:18:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:52,201 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-10-12 16:18:52,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:52,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:52,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570097972] [2020-10-12 16:18:52,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:52,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:18:52,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134904294] [2020-10-12 16:18:52,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:18:52,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:52,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:18:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:18:52,261 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 17 states. [2020-10-12 16:18:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:52,531 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2020-10-12 16:18:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:18:52,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-12 16:18:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:52,533 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:18:52,535 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:18:52,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:18:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:18:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2020-10-12 16:18:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:18:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-10-12 16:18:52,551 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 24 [2020-10-12 16:18:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:52,552 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-10-12 16:18:52,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:18:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-10-12 16:18:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:18:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:52,553 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:52,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:18:52,553 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1057912567, now seen corresponding path program 13 times [2020-10-12 16:18:52,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:52,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041499138] [2020-10-12 16:18:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:52,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:52,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:18:52,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:52,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-12 16:18:52,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:52,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:18:52,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:52,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:18:52,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:53,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:53,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:53,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:53,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:53,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041499138] [2020-10-12 16:18:53,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:53,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:18:53,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864297590] [2020-10-12 16:18:53,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:18:53,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:53,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:18:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:18:53,195 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 16 states. [2020-10-12 16:18:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:53,368 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2020-10-12 16:18:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:18:53,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-12 16:18:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:53,370 INFO L225 Difference]: With dead ends: 179 [2020-10-12 16:18:53,370 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:18:53,371 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 [2020-10-12 16:18:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:18:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-12 16:18:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:18:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2020-10-12 16:18:53,385 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 25 [2020-10-12 16:18:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:53,385 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2020-10-12 16:18:53,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:18:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2020-10-12 16:18:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:18:53,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:53,386 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:53,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:18:53,386 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1538146230, now seen corresponding path program 14 times [2020-10-12 16:18:53,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:53,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930261017] [2020-10-12 16:18:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:53,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:53,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:18:53,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:18:53,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:53,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:53,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:53,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:53,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:53,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930261017] [2020-10-12 16:18:53,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:53,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:18:53,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713233636] [2020-10-12 16:18:53,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:18:53,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:54,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:18:54,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:18:54,000 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 17 states. [2020-10-12 16:18:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:54,197 INFO L93 Difference]: Finished difference Result 178 states and 218 transitions. [2020-10-12 16:18:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:18:54,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-12 16:18:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:54,199 INFO L225 Difference]: With dead ends: 178 [2020-10-12 16:18:54,199 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:18:54,200 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 [2020-10-12 16:18:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:18:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-12 16:18:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:18:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-10-12 16:18:54,212 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 26 [2020-10-12 16:18:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:54,212 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-10-12 16:18:54,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:18:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-10-12 16:18:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:18:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:54,213 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:54,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:18:54,213 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash -411590313, now seen corresponding path program 15 times [2020-10-12 16:18:54,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:54,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422362193] [2020-10-12 16:18:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:54,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:18:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:54,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:18:54,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:54,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:54,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:54,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:54,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:54,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:54,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:54,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:54,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422362193] [2020-10-12 16:18:54,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:54,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:18:54,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066186601] [2020-10-12 16:18:54,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:18:54,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:54,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:18:54,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:18:54,868 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 18 states. [2020-10-12 16:18:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:55,094 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2020-10-12 16:18:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:18:55,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-12 16:18:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:55,096 INFO L225 Difference]: With dead ends: 184 [2020-10-12 16:18:55,096 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 16:18:55,096 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 [2020-10-12 16:18:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 16:18:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-12 16:18:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:18:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-12 16:18:55,113 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 27 [2020-10-12 16:18:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:55,114 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-12 16:18:55,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:18:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-12 16:18:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:18:55,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:55,115 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:55,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:18:55,115 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 151904746, now seen corresponding path program 16 times [2020-10-12 16:18:55,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:55,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069237143] [2020-10-12 16:18:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:55,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:55,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:18:55,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:18:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:56,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:56,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:56,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:56,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069237143] [2020-10-12 16:18:56,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:56,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:18:56,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946829860] [2020-10-12 16:18:56,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:18:56,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:18:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:18:56,381 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2020-10-12 16:18:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:56,811 INFO L93 Difference]: Finished difference Result 135 states and 173 transitions. [2020-10-12 16:18:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:18:56,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-12 16:18:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:56,813 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:18:56,813 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:18:56,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:18:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:18:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-10-12 16:18:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 16:18:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-10-12 16:18:56,832 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 28 [2020-10-12 16:18:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:56,834 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-10-12 16:18:56,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:18:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-10-12 16:18:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:18:56,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:56,838 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:56,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:18:56,838 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:56,838 INFO L82 PathProgramCache]: Analyzing trace with hash 440382391, now seen corresponding path program 17 times [2020-10-12 16:18:56,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:56,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551871288] [2020-10-12 16:18:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:56,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:57,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:57,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:18:57,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:57,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-12 16:18:57,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:18:57,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:18:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:57,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:57,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:57,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:57,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:57,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:57,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:57,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:57,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:57,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:57,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551871288] [2020-10-12 16:18:57,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:57,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:18:57,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138443320] [2020-10-12 16:18:57,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:18:57,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:57,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:18:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:18:57,823 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 20 states. [2020-10-12 16:18:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:58,080 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-10-12 16:18:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:18:58,089 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-12 16:18:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:58,090 INFO L225 Difference]: With dead ends: 203 [2020-10-12 16:18:58,090 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:18:58,091 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 [2020-10-12 16:18:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:18:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-12 16:18:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:18:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-10-12 16:18:58,118 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 29 [2020-10-12 16:18:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:58,118 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-10-12 16:18:58,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:18:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-10-12 16:18:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:18:58,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:58,119 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:58,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:18:58,119 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash 793254794, now seen corresponding path program 18 times [2020-10-12 16:18:58,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:58,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150204884] [2020-10-12 16:18:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:18:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:18:58,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:18:58,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:58,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:58,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:58,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:58,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150204884] [2020-10-12 16:18:58,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:58,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:18:58,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265945808] [2020-10-12 16:18:58,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:18:58,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:18:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:18:58,964 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 21 states. [2020-10-12 16:18:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:59,270 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2020-10-12 16:18:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:18:59,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-12 16:18:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:59,273 INFO L225 Difference]: With dead ends: 202 [2020-10-12 16:18:59,274 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:18:59,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:18:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:18:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2020-10-12 16:18:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:18:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2020-10-12 16:18:59,291 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 30 [2020-10-12 16:18:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:59,291 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2020-10-12 16:18:59,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:18:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2020-10-12 16:18:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:18:59,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:59,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:59,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:18:59,292 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:59,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:59,293 INFO L82 PathProgramCache]: Analyzing trace with hash 20274016, now seen corresponding path program 3 times [2020-10-12 16:18:59,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:59,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117296635] [2020-10-12 16:18:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:59,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:59,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:18:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:18:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-12 16:18:59,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:18:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:59,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:18:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:00,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:00,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:00,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:00,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:19:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:00,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:19:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:00,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:00,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:00,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:00,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:00,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:19:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:19:00,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117296635] [2020-10-12 16:19:00,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:00,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:19:00,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738098538] [2020-10-12 16:19:00,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:19:00,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:19:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:00,088 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 6 states. [2020-10-12 16:19:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:00,182 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2020-10-12 16:19:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:19:00,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-12 16:19:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:00,184 INFO L225 Difference]: With dead ends: 163 [2020-10-12 16:19:00,184 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 16:19:00,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:19:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 16:19:00,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2020-10-12 16:19:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:19:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-12 16:19:00,204 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 34 [2020-10-12 16:19:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:00,204 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-12 16:19:00,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:19:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-12 16:19:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:19:00,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:00,205 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:00,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:19:00,206 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1152602601, now seen corresponding path program 19 times [2020-10-12 16:19:00,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:00,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806060563] [2020-10-12 16:19:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:19:00,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-12 16:19:00,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:19:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:19:00,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:01,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:01,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:01,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:01,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:01,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806060563] [2020-10-12 16:19:01,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:01,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:19:01,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72644306] [2020-10-12 16:19:01,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:19:01,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:19:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:19:01,073 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 22 states. [2020-10-12 16:19:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:01,412 INFO L93 Difference]: Finished difference Result 269 states and 324 transitions. [2020-10-12 16:19:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:19:01,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-12 16:19:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:01,414 INFO L225 Difference]: With dead ends: 269 [2020-10-12 16:19:01,415 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:19:01,415 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 [2020-10-12 16:19:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:19:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2020-10-12 16:19:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:19:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2020-10-12 16:19:01,441 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 31 [2020-10-12 16:19:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:01,441 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2020-10-12 16:19:01,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:19:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2020-10-12 16:19:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:19:01,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:01,442 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:01,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:19:01,442 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1344639702, now seen corresponding path program 20 times [2020-10-12 16:19:01,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:01,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945117364] [2020-10-12 16:19:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:01,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:01,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:19:02,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-12 16:19:02,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:19:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:19:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:19:05,187 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 14 [2020-10-12 16:19:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:05,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:05,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:05,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:05,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945117364] [2020-10-12 16:19:05,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:05,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:05,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101645378] [2020-10-12 16:19:05,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:05,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:05,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:05,254 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand 25 states. [2020-10-12 16:19:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:05,809 INFO L93 Difference]: Finished difference Result 189 states and 241 transitions. [2020-10-12 16:19:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:05,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-12 16:19:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:05,812 INFO L225 Difference]: With dead ends: 189 [2020-10-12 16:19:05,812 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 16:19:05,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 16:19:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-10-12 16:19:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 16:19:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-10-12 16:19:05,834 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 32 [2020-10-12 16:19:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:05,834 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-10-12 16:19:05,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-10-12 16:19:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:19:05,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:05,835 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:05,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:19:05,836 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:05,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1292144759, now seen corresponding path program 21 times [2020-10-12 16:19:05,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:05,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912880297] [2020-10-12 16:19:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:19:06,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:06,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:19:06,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:06,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:06,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:06,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:06,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912880297] [2020-10-12 16:19:06,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:06,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:19:06,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894217772] [2020-10-12 16:19:06,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:19:06,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:19:06,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:19:06,947 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 24 states. [2020-10-12 16:19:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:07,348 INFO L93 Difference]: Finished difference Result 293 states and 359 transitions. [2020-10-12 16:19:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:19:07,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-12 16:19:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:07,349 INFO L225 Difference]: With dead ends: 293 [2020-10-12 16:19:07,350 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 16:19:07,351 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 [2020-10-12 16:19:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 16:19:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2020-10-12 16:19:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:19:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2020-10-12 16:19:07,368 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 33 [2020-10-12 16:19:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:07,369 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2020-10-12 16:19:07,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:19:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2020-10-12 16:19:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:19:07,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:07,370 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:07,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:19:07,370 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1428084426, now seen corresponding path program 22 times [2020-10-12 16:19:07,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:07,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434695509] [2020-10-12 16:19:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:08,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:19:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:19:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:08,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:08,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:08,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:08,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:08,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:08,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434695509] [2020-10-12 16:19:08,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:08,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:19:08,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280658574] [2020-10-12 16:19:08,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:19:08,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:08,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:19:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:08,736 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand 25 states. [2020-10-12 16:19:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:09,183 INFO L93 Difference]: Finished difference Result 293 states and 348 transitions. [2020-10-12 16:19:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:19:09,184 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-12 16:19:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:09,186 INFO L225 Difference]: With dead ends: 293 [2020-10-12 16:19:09,187 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 16:19:09,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:19:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 16:19:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2020-10-12 16:19:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 16:19:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-12 16:19:09,211 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 34 [2020-10-12 16:19:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:09,211 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-12 16:19:09,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:19:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-12 16:19:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:19:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:09,212 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:09,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:19:09,212 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1347246807, now seen corresponding path program 23 times [2020-10-12 16:19:09,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:09,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215902205] [2020-10-12 16:19:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:09,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:09,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:19:09,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-12 16:19:09,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:19:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:19:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:10,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:10,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:10,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:10,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:10,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:10,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:10,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215902205] [2020-10-12 16:19:10,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:10,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:19:10,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745811190] [2020-10-12 16:19:10,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:19:10,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:19:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:10,476 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 26 states. [2020-10-12 16:19:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:10,953 INFO L93 Difference]: Finished difference Result 301 states and 356 transitions. [2020-10-12 16:19:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:19:10,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-12 16:19:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:10,958 INFO L225 Difference]: With dead ends: 301 [2020-10-12 16:19:10,958 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 16:19:10,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:19:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 16:19:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 149. [2020-10-12 16:19:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 16:19:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2020-10-12 16:19:10,979 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 35 [2020-10-12 16:19:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:10,979 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2020-10-12 16:19:10,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:19:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2020-10-12 16:19:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:19:10,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:10,980 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:10,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:19:10,980 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1158719382, now seen corresponding path program 24 times [2020-10-12 16:19:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:10,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987411990] [2020-10-12 16:19:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:12,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:19:12,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,559 WARN L193 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:19:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:18,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:18,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:18,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:18,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987411990] [2020-10-12 16:19:18,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:18,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:19:18,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474428780] [2020-10-12 16:19:18,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:19:18,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:19:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:18,632 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand 29 states. [2020-10-12 16:19:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:19,300 INFO L93 Difference]: Finished difference Result 205 states and 257 transitions. [2020-10-12 16:19:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:19:19,300 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2020-10-12 16:19:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:19,302 INFO L225 Difference]: With dead ends: 205 [2020-10-12 16:19:19,303 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 16:19:19,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:19:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 16:19:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 161. [2020-10-12 16:19:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 16:19:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2020-10-12 16:19:19,333 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 36 [2020-10-12 16:19:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:19,333 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2020-10-12 16:19:19,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:19:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2020-10-12 16:19:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:19:19,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:19,334 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:19,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:19:19,334 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1534259913, now seen corresponding path program 25 times [2020-10-12 16:19:19,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:19,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996476546] [2020-10-12 16:19:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:19:20,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-12 16:19:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:19:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:19:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:20,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:20,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:20,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:20,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:20,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:20,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:20,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:20,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996476546] [2020-10-12 16:19:20,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:20,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:19:20,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089056479] [2020-10-12 16:19:20,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:19:20,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:19:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:19:20,691 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand 28 states. [2020-10-12 16:19:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:21,193 INFO L93 Difference]: Finished difference Result 325 states and 391 transitions. [2020-10-12 16:19:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:19:21,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-12 16:19:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:21,195 INFO L225 Difference]: With dead ends: 325 [2020-10-12 16:19:21,195 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 16:19:21,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:19:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 16:19:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 157. [2020-10-12 16:19:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:19:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-10-12 16:19:21,214 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 37 [2020-10-12 16:19:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:21,214 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-10-12 16:19:21,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:19:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-10-12 16:19:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:19:21,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:21,215 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:21,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:19:21,216 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1829906143, now seen corresponding path program 4 times [2020-10-12 16:19:21,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:21,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132772272] [2020-10-12 16:19:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:19:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:23,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:19:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:19:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:23,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:23,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:23,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:19:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:23,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:23,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:19:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:23,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:23,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 16:19:23,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132772272] [2020-10-12 16:19:23,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:23,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:19:23,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250013061] [2020-10-12 16:19:23,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:19:23,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:23,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:19:23,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:19:23,886 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 9 states. [2020-10-12 16:19:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:24,088 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2020-10-12 16:19:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:19:24,090 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-12 16:19:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:24,092 INFO L225 Difference]: With dead ends: 233 [2020-10-12 16:19:24,092 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 16:19:24,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:19:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 16:19:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2020-10-12 16:19:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 16:19:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 221 transitions. [2020-10-12 16:19:24,116 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 221 transitions. Word has length 42 [2020-10-12 16:19:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:24,117 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 221 transitions. [2020-10-12 16:19:24,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:19:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 221 transitions. [2020-10-12 16:19:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:19:24,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:24,118 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:24,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:19:24,118 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -291114486, now seen corresponding path program 26 times [2020-10-12 16:19:24,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:24,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742923310] [2020-10-12 16:19:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:19:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:24,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:19:24,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:25,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:25,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:25,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:25,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742923310] [2020-10-12 16:19:25,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:25,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:19:25,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616269810] [2020-10-12 16:19:25,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:19:25,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:19:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:19:25,488 INFO L87 Difference]: Start difference. First operand 192 states and 221 transitions. Second operand 29 states. [2020-10-12 16:19:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:26,045 INFO L93 Difference]: Finished difference Result 400 states and 470 transitions. [2020-10-12 16:19:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:19:26,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-12 16:19:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:26,046 INFO L225 Difference]: With dead ends: 400 [2020-10-12 16:19:26,046 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 16:19:26,049 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 [2020-10-12 16:19:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 16:19:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2020-10-12 16:19:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-12 16:19:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 226 transitions. [2020-10-12 16:19:26,084 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 226 transitions. Word has length 38 [2020-10-12 16:19:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:26,084 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 226 transitions. [2020-10-12 16:19:26,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:19:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 226 transitions. [2020-10-12 16:19:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:19:26,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:26,086 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:26,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:19:26,086 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash -408311913, now seen corresponding path program 27 times [2020-10-12 16:19:26,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:26,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619277240] [2020-10-12 16:19:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:26,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:26,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:26,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:19:26,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:26,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-12 16:19:26,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:19:26,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:26,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:19:26,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:27,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:27,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:27,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:27,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619277240] [2020-10-12 16:19:27,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:27,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:19:27,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599276343] [2020-10-12 16:19:27,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:19:27,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:19:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:19:27,401 INFO L87 Difference]: Start difference. First operand 197 states and 226 transitions. Second operand 30 states. [2020-10-12 16:19:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:28,043 INFO L93 Difference]: Finished difference Result 410 states and 480 transitions. [2020-10-12 16:19:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:19:28,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-12 16:19:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:28,045 INFO L225 Difference]: With dead ends: 410 [2020-10-12 16:19:28,045 INFO L226 Difference]: Without dead ends: 221 [2020-10-12 16:19:28,046 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 [2020-10-12 16:19:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-12 16:19:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 202. [2020-10-12 16:19:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 16:19:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2020-10-12 16:19:28,090 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 39 [2020-10-12 16:19:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:28,090 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2020-10-12 16:19:28,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:19:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2020-10-12 16:19:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:19:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:28,091 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:28,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:19:28,091 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 253535146, now seen corresponding path program 28 times [2020-10-12 16:19:28,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:28,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425718403] [2020-10-12 16:19:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:19:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,446 WARN L193 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-12 16:19:34,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:34,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:34,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:34,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:34,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:34,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:34,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:34,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425718403] [2020-10-12 16:19:34,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:34,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:19:34,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194600046] [2020-10-12 16:19:34,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:19:34,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:19:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:34,535 INFO L87 Difference]: Start difference. First operand 202 states and 231 transitions. Second operand 33 states. [2020-10-12 16:19:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:35,388 INFO L93 Difference]: Finished difference Result 271 states and 337 transitions. [2020-10-12 16:19:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:19:35,389 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-10-12 16:19:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:35,391 INFO L225 Difference]: With dead ends: 271 [2020-10-12 16:19:35,391 INFO L226 Difference]: Without dead ends: 269 [2020-10-12 16:19:35,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:19:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-12 16:19:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 216. [2020-10-12 16:19:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 16:19:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 254 transitions. [2020-10-12 16:19:35,433 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 254 transitions. Word has length 40 [2020-10-12 16:19:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:35,433 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 254 transitions. [2020-10-12 16:19:35,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:19:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 254 transitions. [2020-10-12 16:19:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:19:35,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:35,435 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:35,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:19:35,435 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash -704042505, now seen corresponding path program 29 times [2020-10-12 16:19:35,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:35,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210276867] [2020-10-12 16:19:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:35,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:36,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:36,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:19:36,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:36,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-12 16:19:36,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:36,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:19:36,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:36,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:19:36,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:37,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:37,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:37,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:37,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:37,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210276867] [2020-10-12 16:19:37,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:37,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:19:37,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125498345] [2020-10-12 16:19:37,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:19:37,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:19:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:19:37,038 INFO L87 Difference]: Start difference. First operand 216 states and 254 transitions. Second operand 32 states. [2020-10-12 16:19:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:37,703 INFO L93 Difference]: Finished difference Result 439 states and 523 transitions. [2020-10-12 16:19:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:19:37,703 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-12 16:19:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:37,705 INFO L225 Difference]: With dead ends: 439 [2020-10-12 16:19:37,705 INFO L226 Difference]: Without dead ends: 231 [2020-10-12 16:19:37,706 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 [2020-10-12 16:19:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-12 16:19:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 212. [2020-10-12 16:19:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-12 16:19:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 241 transitions. [2020-10-12 16:19:37,730 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 241 transitions. Word has length 41 [2020-10-12 16:19:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:37,731 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 241 transitions. [2020-10-12 16:19:37,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:19:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 241 transitions. [2020-10-12 16:19:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:19:37,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:37,732 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:37,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:19:37,732 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash -324178614, now seen corresponding path program 30 times [2020-10-12 16:19:37,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:37,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773381369] [2020-10-12 16:19:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:37,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:38,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:19:38,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:39,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:39,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:39,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:39,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:39,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:39,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773381369] [2020-10-12 16:19:39,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:39,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:19:39,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613209642] [2020-10-12 16:19:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:19:39,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:39,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:19:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:39,549 INFO L87 Difference]: Start difference. First operand 212 states and 241 transitions. Second operand 33 states. [2020-10-12 16:19:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:40,264 INFO L93 Difference]: Finished difference Result 440 states and 510 transitions. [2020-10-12 16:19:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:19:40,265 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-12 16:19:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:40,267 INFO L225 Difference]: With dead ends: 440 [2020-10-12 16:19:40,267 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 16:19:40,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:19:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 16:19:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2020-10-12 16:19:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 16:19:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 246 transitions. [2020-10-12 16:19:40,291 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 246 transitions. Word has length 42 [2020-10-12 16:19:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:40,292 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 246 transitions. [2020-10-12 16:19:40,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:19:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 246 transitions. [2020-10-12 16:19:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:19:40,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:40,292 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:40,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:19:40,293 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1433299881, now seen corresponding path program 31 times [2020-10-12 16:19:40,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:40,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958377394] [2020-10-12 16:19:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:40,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:41,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1390 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:19:41,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:42,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:42,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958377394] [2020-10-12 16:19:42,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:42,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:19:42,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127652267] [2020-10-12 16:19:42,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:19:42,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:19:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:19:42,573 INFO L87 Difference]: Start difference. First operand 217 states and 246 transitions. Second operand 34 states. [2020-10-12 16:19:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:43,290 INFO L93 Difference]: Finished difference Result 450 states and 520 transitions. [2020-10-12 16:19:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:19:43,291 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-12 16:19:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:43,293 INFO L225 Difference]: With dead ends: 450 [2020-10-12 16:19:43,293 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 16:19:43,297 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 [2020-10-12 16:19:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 16:19:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 222. [2020-10-12 16:19:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 16:19:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 251 transitions. [2020-10-12 16:19:43,333 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 251 transitions. Word has length 43 [2020-10-12 16:19:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:43,333 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 251 transitions. [2020-10-12 16:19:43,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:19:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 251 transitions. [2020-10-12 16:19:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:19:43,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:43,334 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:43,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:19:43,334 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:43,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1456320790, now seen corresponding path program 32 times [2020-10-12 16:19:43,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:43,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867042677] [2020-10-12 16:19:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:43,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:44,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1272 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:19:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:45,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867042677] [2020-10-12 16:19:45,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:45,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:19:45,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486220945] [2020-10-12 16:19:45,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:19:45,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:19:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:19:45,619 INFO L87 Difference]: Start difference. First operand 222 states and 251 transitions. Second operand 37 states. [2020-10-12 16:19:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:46,460 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2020-10-12 16:19:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:19:46,461 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-10-12 16:19:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:46,463 INFO L225 Difference]: With dead ends: 291 [2020-10-12 16:19:46,463 INFO L226 Difference]: Without dead ends: 289 [2020-10-12 16:19:46,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:19:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-12 16:19:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2020-10-12 16:19:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-12 16:19:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 274 transitions. [2020-10-12 16:19:46,507 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 274 transitions. Word has length 44 [2020-10-12 16:19:46,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:46,507 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 274 transitions. [2020-10-12 16:19:46,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:19:46,508 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 274 transitions. [2020-10-12 16:19:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:19:46,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:46,511 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:46,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:19:46,511 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:46,511 INFO L82 PathProgramCache]: Analyzing trace with hash 510723554, now seen corresponding path program 5 times [2020-10-12 16:19:46,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:46,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003012222] [2020-10-12 16:19:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:19:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:49,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:19:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:19:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:19:49,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:19:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:19:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 16:19:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:19:49,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:19:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-12 16:19:49,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003012222] [2020-10-12 16:19:49,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:49,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:19:49,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472552006] [2020-10-12 16:19:49,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:19:49,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:19:49,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:19:49,552 INFO L87 Difference]: Start difference. First operand 236 states and 274 transitions. Second operand 8 states. [2020-10-12 16:19:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:49,749 INFO L93 Difference]: Finished difference Result 328 states and 382 transitions. [2020-10-12 16:19:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:19:49,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-10-12 16:19:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:49,756 INFO L225 Difference]: With dead ends: 328 [2020-10-12 16:19:49,756 INFO L226 Difference]: Without dead ends: 321 [2020-10-12 16:19:49,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:19:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-12 16:19:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 279. [2020-10-12 16:19:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-12 16:19:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 325 transitions. [2020-10-12 16:19:49,809 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 325 transitions. Word has length 50 [2020-10-12 16:19:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:49,810 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 325 transitions. [2020-10-12 16:19:49,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:19:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 325 transitions. [2020-10-12 16:19:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:19:49,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:49,812 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:49,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:19:49,812 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2124998327, now seen corresponding path program 33 times [2020-10-12 16:19:49,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:49,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83516132] [2020-10-12 16:19:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:50,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:50,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:19:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:51,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:51,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:51,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:51,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83516132] [2020-10-12 16:19:51,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:51,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:19:51,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019338076] [2020-10-12 16:19:51,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:19:51,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:19:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:19:51,780 INFO L87 Difference]: Start difference. First operand 279 states and 325 transitions. Second operand 36 states. [2020-10-12 16:19:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:52,596 INFO L93 Difference]: Finished difference Result 569 states and 671 transitions. [2020-10-12 16:19:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:19:52,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-12 16:19:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:52,599 INFO L225 Difference]: With dead ends: 569 [2020-10-12 16:19:52,599 INFO L226 Difference]: Without dead ends: 298 [2020-10-12 16:19:52,604 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 [2020-10-12 16:19:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-12 16:19:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 275. [2020-10-12 16:19:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-12 16:19:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 310 transitions. [2020-10-12 16:19:52,654 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 310 transitions. Word has length 45 [2020-10-12 16:19:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:52,655 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 310 transitions. [2020-10-12 16:19:52,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:19:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 310 transitions. [2020-10-12 16:19:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:19:52,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:52,656 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:52,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:19:52,656 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1476741258, now seen corresponding path program 34 times [2020-10-12 16:19:52,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:52,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184483784] [2020-10-12 16:19:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:52,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:53,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:53,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:19:53,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1117 [2020-10-12 16:19:53,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:19:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:19:53,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:54,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:54,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:54,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:54,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:54,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:54,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:54,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:54,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:54,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:54,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184483784] [2020-10-12 16:19:54,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:54,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:19:54,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735143658] [2020-10-12 16:19:54,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:19:54,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:19:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:19:54,900 INFO L87 Difference]: Start difference. First operand 275 states and 310 transitions. Second operand 37 states. [2020-10-12 16:19:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:55,779 INFO L93 Difference]: Finished difference Result 571 states and 656 transitions. [2020-10-12 16:19:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:19:55,779 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-12 16:19:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:55,781 INFO L225 Difference]: With dead ends: 571 [2020-10-12 16:19:55,781 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 16:19:55,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:19:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 16:19:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 281. [2020-10-12 16:19:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-12 16:19:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 316 transitions. [2020-10-12 16:19:55,815 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 316 transitions. Word has length 46 [2020-10-12 16:19:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:55,815 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 316 transitions. [2020-10-12 16:19:55,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:19:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 316 transitions. [2020-10-12 16:19:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:19:55,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:55,816 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:55,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:19:55,816 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1439358697, now seen corresponding path program 35 times [2020-10-12 16:19:55,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:55,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957141881] [2020-10-12 16:19:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:55,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:19:56,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-12 16:19:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:19:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:19:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:19:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 16:19:57,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:57,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:57,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:57,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:57,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:57,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:57,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:57,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957141881] [2020-10-12 16:19:57,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:57,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:19:57,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193006100] [2020-10-12 16:19:57,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:19:57,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:19:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:19:57,761 INFO L87 Difference]: Start difference. First operand 281 states and 316 transitions. Second operand 38 states. [2020-10-12 16:19:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:58,670 INFO L93 Difference]: Finished difference Result 583 states and 668 transitions. [2020-10-12 16:19:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:19:58,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-12 16:19:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:58,672 INFO L225 Difference]: With dead ends: 583 [2020-10-12 16:19:58,673 INFO L226 Difference]: Without dead ends: 310 [2020-10-12 16:19:58,675 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 [2020-10-12 16:19:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-12 16:19:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 287. [2020-10-12 16:19:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-12 16:19:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 322 transitions. [2020-10-12 16:19:58,715 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 322 transitions. Word has length 47 [2020-10-12 16:19:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:58,717 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 322 transitions. [2020-10-12 16:19:58,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:19:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 322 transitions. [2020-10-12 16:19:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:19:58,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:58,723 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:58,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:19:58,723 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1644144086, now seen corresponding path program 36 times [2020-10-12 16:19:58,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:58,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182646954] [2020-10-12 16:19:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:00,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:00,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:20:00,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2136 [2020-10-12 16:20:00,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:20:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:00,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:20:00,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,401 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 54 DAG size of output: 15 [2020-10-12 16:20:07,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:07,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:07,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:07,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:07,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:07,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:07,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:07,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:07,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:07,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:07,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182646954] [2020-10-12 16:20:07,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:07,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:20:07,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235222180] [2020-10-12 16:20:07,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:20:07,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:20:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:07,510 INFO L87 Difference]: Start difference. First operand 287 states and 322 transitions. Second operand 41 states. [2020-10-12 16:20:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:08,773 INFO L93 Difference]: Finished difference Result 369 states and 449 transitions. [2020-10-12 16:20:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:20:08,774 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2020-10-12 16:20:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:08,777 INFO L225 Difference]: With dead ends: 369 [2020-10-12 16:20:08,778 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 16:20:08,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:20:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 16:20:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 303. [2020-10-12 16:20:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-10-12 16:20:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 349 transitions. [2020-10-12 16:20:08,816 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 349 transitions. Word has length 48 [2020-10-12 16:20:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:08,816 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 349 transitions. [2020-10-12 16:20:08,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:20:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 349 transitions. [2020-10-12 16:20:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:20:08,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:08,818 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:08,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:20:08,818 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash 597443447, now seen corresponding path program 37 times [2020-10-12 16:20:08,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:08,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642391429] [2020-10-12 16:20:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:10,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:10,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:20:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:11,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:11,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:11,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:11,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:11,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:11,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:11,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642391429] [2020-10-12 16:20:11,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:11,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:20:11,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446106088] [2020-10-12 16:20:11,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:20:11,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:11,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:20:11,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:20:11,571 INFO L87 Difference]: Start difference. First operand 303 states and 349 transitions. Second operand 40 states. [2020-10-12 16:20:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:12,521 INFO L93 Difference]: Finished difference Result 617 states and 719 transitions. [2020-10-12 16:20:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:20:12,522 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-12 16:20:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:12,524 INFO L225 Difference]: With dead ends: 617 [2020-10-12 16:20:12,524 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 16:20:12,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:20:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 16:20:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 299. [2020-10-12 16:20:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-12 16:20:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 334 transitions. [2020-10-12 16:20:12,557 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 334 transitions. Word has length 49 [2020-10-12 16:20:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:12,557 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 334 transitions. [2020-10-12 16:20:12,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:20:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 334 transitions. [2020-10-12 16:20:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:20:12,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:12,558 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:12,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:20:12,559 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1367180234, now seen corresponding path program 38 times [2020-10-12 16:20:12,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:12,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864525458] [2020-10-12 16:20:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:12,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:20:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:14,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:14,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:14,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:14,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:14,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864525458] [2020-10-12 16:20:14,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:14,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:20:14,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541616882] [2020-10-12 16:20:14,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:20:14,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:20:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:14,893 INFO L87 Difference]: Start difference. First operand 299 states and 334 transitions. Second operand 41 states. [2020-10-12 16:20:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:15,932 INFO L93 Difference]: Finished difference Result 619 states and 704 transitions. [2020-10-12 16:20:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:20:15,932 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-12 16:20:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:15,934 INFO L225 Difference]: With dead ends: 619 [2020-10-12 16:20:15,934 INFO L226 Difference]: Without dead ends: 328 [2020-10-12 16:20:15,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:20:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-12 16:20:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 305. [2020-10-12 16:20:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-12 16:20:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 340 transitions. [2020-10-12 16:20:15,976 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 340 transitions. Word has length 50 [2020-10-12 16:20:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:15,976 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 340 transitions. [2020-10-12 16:20:15,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:20:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 340 transitions. [2020-10-12 16:20:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:20:15,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:15,978 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:15,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:20:15,978 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -540783145, now seen corresponding path program 39 times [2020-10-12 16:20:15,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:15,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765630198] [2020-10-12 16:20:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:17,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:17,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:20:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:18,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:18,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:18,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765630198] [2020-10-12 16:20:18,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:18,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:20:18,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818874914] [2020-10-12 16:20:18,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:20:18,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:20:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:20:18,725 INFO L87 Difference]: Start difference. First operand 305 states and 340 transitions. Second operand 42 states. [2020-10-12 16:20:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:19,822 INFO L93 Difference]: Finished difference Result 631 states and 716 transitions. [2020-10-12 16:20:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:20:19,827 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-12 16:20:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:19,829 INFO L225 Difference]: With dead ends: 631 [2020-10-12 16:20:19,829 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 16:20:19,831 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 [2020-10-12 16:20:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 16:20:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 311. [2020-10-12 16:20:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-12 16:20:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 346 transitions. [2020-10-12 16:20:19,868 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 346 transitions. Word has length 51 [2020-10-12 16:20:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:19,869 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 346 transitions. [2020-10-12 16:20:19,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:20:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 346 transitions. [2020-10-12 16:20:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:20:19,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:19,870 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:19,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:20:19,870 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:19,871 INFO L82 PathProgramCache]: Analyzing trace with hash 27255203, now seen corresponding path program 6 times [2020-10-12 16:20:19,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:19,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851318269] [2020-10-12 16:20:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:20,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:24,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:24,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:20:24,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:20:24,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 16:20:24,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:20:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:24,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:20:24,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,443 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 42 DAG size of output: 14 [2020-10-12 16:20:30,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:30,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:30,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:20:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:30,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:20:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:20:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:20:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 16:20:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 16:20:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:20:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:30,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:20:30,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-12 16:20:30,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851318269] [2020-10-12 16:20:30,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:30,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:20:30,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344046801] [2020-10-12 16:20:30,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:20:30,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:20:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:20:30,510 INFO L87 Difference]: Start difference. First operand 311 states and 346 transitions. Second operand 11 states. [2020-10-12 16:20:30,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:30,826 INFO L93 Difference]: Finished difference Result 415 states and 462 transitions. [2020-10-12 16:20:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:20:30,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-12 16:20:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:30,829 INFO L225 Difference]: With dead ends: 415 [2020-10-12 16:20:30,829 INFO L226 Difference]: Without dead ends: 408 [2020-10-12 16:20:30,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:20:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-12 16:20:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 360. [2020-10-12 16:20:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-10-12 16:20:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 401 transitions. [2020-10-12 16:20:30,873 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 401 transitions. Word has length 58 [2020-10-12 16:20:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:30,873 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 401 transitions. [2020-10-12 16:20:30,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:20:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 401 transitions. [2020-10-12 16:20:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:20:30,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:30,874 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:30,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:20:30,874 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash 441894250, now seen corresponding path program 40 times [2020-10-12 16:20:30,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:30,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378506354] [2020-10-12 16:20:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:20:32,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:32,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-12 16:20:32,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:20:32,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:32,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:20:32,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:44,156 WARN L193 SmtUtils]: Spent 10.37 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:20:44,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:44,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:44,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:44,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378506354] [2020-10-12 16:20:44,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:44,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:20:44,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781070141] [2020-10-12 16:20:44,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:20:44,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:20:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:44,271 INFO L87 Difference]: Start difference. First operand 360 states and 401 transitions. Second operand 45 states. [2020-10-12 16:20:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:45,655 INFO L93 Difference]: Finished difference Result 455 states and 549 transitions. [2020-10-12 16:20:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:20:45,656 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2020-10-12 16:20:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:45,659 INFO L225 Difference]: With dead ends: 455 [2020-10-12 16:20:45,659 INFO L226 Difference]: Without dead ends: 453 [2020-10-12 16:20:45,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:20:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-12 16:20:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 378. [2020-10-12 16:20:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-12 16:20:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 432 transitions. [2020-10-12 16:20:45,706 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 432 transitions. Word has length 52 [2020-10-12 16:20:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:45,707 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 432 transitions. [2020-10-12 16:20:45,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:20:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 432 transitions. [2020-10-12 16:20:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:20:45,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:45,708 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:45,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:20:45,708 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 840122423, now seen corresponding path program 41 times [2020-10-12 16:20:45,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:45,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700095717] [2020-10-12 16:20:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:45,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:47,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:47,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:20:47,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:47,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-12 16:20:47,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:47,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:20:47,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:47,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:20:47,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:48,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:48,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:48,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:48,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:48,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700095717] [2020-10-12 16:20:48,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:48,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:20:48,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028260595] [2020-10-12 16:20:48,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:20:48,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:20:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:20:48,647 INFO L87 Difference]: Start difference. First operand 378 states and 432 transitions. Second operand 44 states. [2020-10-12 16:20:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:49,872 INFO L93 Difference]: Finished difference Result 771 states and 891 transitions. [2020-10-12 16:20:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:20:49,873 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-12 16:20:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:49,875 INFO L225 Difference]: With dead ends: 771 [2020-10-12 16:20:49,875 INFO L226 Difference]: Without dead ends: 401 [2020-10-12 16:20:49,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:20:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-12 16:20:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 374. [2020-10-12 16:20:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-10-12 16:20:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 415 transitions. [2020-10-12 16:20:49,914 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 415 transitions. Word has length 53 [2020-10-12 16:20:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:49,915 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 415 transitions. [2020-10-12 16:20:49,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:20:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 415 transitions. [2020-10-12 16:20:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:20:49,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:49,916 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:49,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:20:49,916 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash 300293898, now seen corresponding path program 42 times [2020-10-12 16:20:49,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:49,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57909364] [2020-10-12 16:20:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:49,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:51,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:20:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:53,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:53,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:53,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:53,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57909364] [2020-10-12 16:20:53,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:53,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:20:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775814173] [2020-10-12 16:20:53,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:20:53,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:20:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:53,305 INFO L87 Difference]: Start difference. First operand 374 states and 415 transitions. Second operand 45 states. [2020-10-12 16:20:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:54,624 INFO L93 Difference]: Finished difference Result 774 states and 874 transitions. [2020-10-12 16:20:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:20:54,625 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-12 16:20:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:54,627 INFO L225 Difference]: With dead ends: 774 [2020-10-12 16:20:54,627 INFO L226 Difference]: Without dead ends: 408 [2020-10-12 16:20:54,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:20:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-12 16:20:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 381. [2020-10-12 16:20:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-12 16:20:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 422 transitions. [2020-10-12 16:20:54,674 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 422 transitions. Word has length 54 [2020-10-12 16:20:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:54,674 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 422 transitions. [2020-10-12 16:20:54,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:20:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 422 transitions. [2020-10-12 16:20:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:20:54,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:54,675 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:54,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:20:54,676 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 745478807, now seen corresponding path program 43 times [2020-10-12 16:20:54,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:54,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380753161] [2020-10-12 16:20:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:56,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:56,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:20:56,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:56,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1765 [2020-10-12 16:20:56,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:20:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:20:56,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:20:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:58,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:58,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:58,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:58,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:58,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:58,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:58,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:58,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:58,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380753161] [2020-10-12 16:20:58,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:58,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:20:58,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026464769] [2020-10-12 16:20:58,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:20:58,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:58,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:20:58,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:20:58,103 INFO L87 Difference]: Start difference. First operand 381 states and 422 transitions. Second operand 46 states. [2020-10-12 16:20:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:59,476 INFO L93 Difference]: Finished difference Result 788 states and 888 transitions. [2020-10-12 16:20:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:20:59,476 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-12 16:20:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:59,478 INFO L225 Difference]: With dead ends: 788 [2020-10-12 16:20:59,478 INFO L226 Difference]: Without dead ends: 415 [2020-10-12 16:20:59,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:20:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-12 16:20:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 388. [2020-10-12 16:20:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-10-12 16:20:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 429 transitions. [2020-10-12 16:20:59,529 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 429 transitions. Word has length 55 [2020-10-12 16:20:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:59,529 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 429 transitions. [2020-10-12 16:20:59,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:20:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 429 transitions. [2020-10-12 16:20:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:20:59,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:59,531 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:59,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:20:59,531 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:59,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1661309098, now seen corresponding path program 44 times [2020-10-12 16:20:59,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:59,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175252343] [2020-10-12 16:20:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:01,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3278 [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:21:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:21:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,679 WARN L193 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:21:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:10,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:10,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:10,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175252343] [2020-10-12 16:21:10,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:10,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:21:10,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025373856] [2020-10-12 16:21:10,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:21:10,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:21:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:10,822 INFO L87 Difference]: Start difference. First operand 388 states and 429 transitions. Second operand 49 states. [2020-10-12 16:21:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:12,484 INFO L93 Difference]: Finished difference Result 483 states and 577 transitions. [2020-10-12 16:21:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:21:12,485 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2020-10-12 16:21:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:12,488 INFO L225 Difference]: With dead ends: 483 [2020-10-12 16:21:12,488 INFO L226 Difference]: Without dead ends: 481 [2020-10-12 16:21:12,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-12 16:21:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 406. [2020-10-12 16:21:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-12 16:21:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 460 transitions. [2020-10-12 16:21:12,530 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 460 transitions. Word has length 56 [2020-10-12 16:21:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:12,530 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 460 transitions. [2020-10-12 16:21:12,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:21:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 460 transitions. [2020-10-12 16:21:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:21:12,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:12,532 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:12,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:21:12,532 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash -12722953, now seen corresponding path program 45 times [2020-10-12 16:21:12,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:12,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001209505] [2020-10-12 16:21:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:14,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:14,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:21:14,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:14,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2271 [2020-10-12 16:21:14,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:21:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:21:14,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:16,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:16,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:16,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:16,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:16,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:16,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:16,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:16,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:16,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:16,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001209505] [2020-10-12 16:21:16,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:16,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:21:16,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331761406] [2020-10-12 16:21:16,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:21:16,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:21:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:21:16,652 INFO L87 Difference]: Start difference. First operand 406 states and 460 transitions. Second operand 48 states. [2020-10-12 16:21:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:18,077 INFO L93 Difference]: Finished difference Result 827 states and 947 transitions. [2020-10-12 16:21:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:21:18,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-12 16:21:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:18,080 INFO L225 Difference]: With dead ends: 827 [2020-10-12 16:21:18,080 INFO L226 Difference]: Without dead ends: 429 [2020-10-12 16:21:18,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:21:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-12 16:21:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 402. [2020-10-12 16:21:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-12 16:21:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 443 transitions. [2020-10-12 16:21:18,129 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 443 transitions. Word has length 57 [2020-10-12 16:21:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:18,130 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 443 transitions. [2020-10-12 16:21:18,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:21:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 443 transitions. [2020-10-12 16:21:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:21:18,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:18,131 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:18,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:21:18,131 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -368108982, now seen corresponding path program 46 times [2020-10-12 16:21:18,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:18,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095327029] [2020-10-12 16:21:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:20,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:20,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:21:20,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2168 [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:21:20,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:22,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:22,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:22,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:22,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095327029] [2020-10-12 16:21:22,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:22,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:21:22,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116746185] [2020-10-12 16:21:22,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:21:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:21:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:22,159 INFO L87 Difference]: Start difference. First operand 402 states and 443 transitions. Second operand 49 states. [2020-10-12 16:21:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:23,640 INFO L93 Difference]: Finished difference Result 830 states and 930 transitions. [2020-10-12 16:21:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:21:23,641 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-12 16:21:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:23,642 INFO L225 Difference]: With dead ends: 830 [2020-10-12 16:21:23,643 INFO L226 Difference]: Without dead ends: 436 [2020-10-12 16:21:23,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:21:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-12 16:21:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 409. [2020-10-12 16:21:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-12 16:21:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 450 transitions. [2020-10-12 16:21:23,694 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 450 transitions. Word has length 58 [2020-10-12 16:21:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:23,694 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 450 transitions. [2020-10-12 16:21:23,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:21:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 450 transitions. [2020-10-12 16:21:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:21:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:23,696 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:23,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:21:23,696 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash 693857380, now seen corresponding path program 7 times [2020-10-12 16:21:23,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:23,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136009833] [2020-10-12 16:21:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:23,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:23,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:21:28,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:21:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:21:28,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:21:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:21:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:21:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:28,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:21:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:21:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:21:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:21:28,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:21:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 16:21:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 16:21:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 16:21:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:28,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:28,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:21:28,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-12 16:21:28,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136009833] [2020-10-12 16:21:28,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:28,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:21:28,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853466942] [2020-10-12 16:21:28,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:21:28,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:21:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:21:28,863 INFO L87 Difference]: Start difference. First operand 409 states and 450 transitions. Second operand 10 states. [2020-10-12 16:21:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:29,145 INFO L93 Difference]: Finished difference Result 527 states and 580 transitions. [2020-10-12 16:21:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:21:29,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-12 16:21:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:29,149 INFO L225 Difference]: With dead ends: 527 [2020-10-12 16:21:29,149 INFO L226 Difference]: Without dead ends: 520 [2020-10-12 16:21:29,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:21:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-12 16:21:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 465. [2020-10-12 16:21:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-12 16:21:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 512 transitions. [2020-10-12 16:21:29,208 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 512 transitions. Word has length 66 [2020-10-12 16:21:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:29,208 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 512 transitions. [2020-10-12 16:21:29,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:21:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 512 transitions. [2020-10-12 16:21:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:21:29,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:29,210 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:29,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:21:29,210 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1499826007, now seen corresponding path program 47 times [2020-10-12 16:21:29,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:29,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377061603] [2020-10-12 16:21:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:31,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:31,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2172 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:21:31,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:33,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:33,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:33,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:33,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:33,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:33,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:33,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:33,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:33,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:33,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377061603] [2020-10-12 16:21:33,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:33,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:21:33,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108459864] [2020-10-12 16:21:33,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:21:33,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:21:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:33,297 INFO L87 Difference]: Start difference. First operand 465 states and 512 transitions. Second operand 50 states. [2020-10-12 16:21:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:34,802 INFO L93 Difference]: Finished difference Result 961 states and 1076 transitions. [2020-10-12 16:21:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:21:34,803 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-12 16:21:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:34,805 INFO L225 Difference]: With dead ends: 961 [2020-10-12 16:21:34,805 INFO L226 Difference]: Without dead ends: 504 [2020-10-12 16:21:34,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:21:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-12 16:21:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 473. [2020-10-12 16:21:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-12 16:21:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 520 transitions. [2020-10-12 16:21:34,869 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 520 transitions. Word has length 59 [2020-10-12 16:21:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:34,869 INFO L479 AbstractCegarLoop]: Abstraction has 473 states and 520 transitions. [2020-10-12 16:21:34,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:21:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 520 transitions. [2020-10-12 16:21:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:21:34,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:34,872 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:34,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:21:34,874 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:34,874 INFO L82 PathProgramCache]: Analyzing trace with hash -723731478, now seen corresponding path program 48 times [2020-10-12 16:21:34,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:34,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88147527] [2020-10-12 16:21:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4616 [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:21:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:21:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,528 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-10-12 16:21:45,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:45,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:45,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:45,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:45,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:45,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:45,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:45,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:45,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:45,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88147527] [2020-10-12 16:21:45,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:45,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:21:45,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338084452] [2020-10-12 16:21:45,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:21:45,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:21:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:21:45,671 INFO L87 Difference]: Start difference. First operand 473 states and 520 transitions. Second operand 53 states. [2020-10-12 16:21:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:47,577 INFO L93 Difference]: Finished difference Result 581 states and 689 transitions. [2020-10-12 16:21:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:21:47,578 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2020-10-12 16:21:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:47,581 INFO L225 Difference]: With dead ends: 581 [2020-10-12 16:21:47,582 INFO L226 Difference]: Without dead ends: 579 [2020-10-12 16:21:47,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:21:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-12 16:21:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 493. [2020-10-12 16:21:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-10-12 16:21:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 555 transitions. [2020-10-12 16:21:47,646 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 555 transitions. Word has length 60 [2020-10-12 16:21:47,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:47,646 INFO L479 AbstractCegarLoop]: Abstraction has 493 states and 555 transitions. [2020-10-12 16:21:47,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:21:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 555 transitions. [2020-10-12 16:21:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:21:47,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:47,647 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:47,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:21:47,648 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -934536777, now seen corresponding path program 49 times [2020-10-12 16:21:47,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:47,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843588791] [2020-10-12 16:21:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:47,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:50,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3089 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:21:50,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:52,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:52,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:52,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843588791] [2020-10-12 16:21:52,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:52,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:21:52,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662868493] [2020-10-12 16:21:52,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:21:52,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:21:52,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:21:52,754 INFO L87 Difference]: Start difference. First operand 493 states and 555 transitions. Second operand 52 states. [2020-10-12 16:21:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:21:54,364 INFO L93 Difference]: Finished difference Result 1005 states and 1143 transitions. [2020-10-12 16:21:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:21:54,365 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-12 16:21:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:21:54,367 INFO L225 Difference]: With dead ends: 1005 [2020-10-12 16:21:54,367 INFO L226 Difference]: Without dead ends: 520 [2020-10-12 16:21:54,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:21:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-12 16:21:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 489. [2020-10-12 16:21:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-12 16:21:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 536 transitions. [2020-10-12 16:21:54,430 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 536 transitions. Word has length 61 [2020-10-12 16:21:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:21:54,430 INFO L479 AbstractCegarLoop]: Abstraction has 489 states and 536 transitions. [2020-10-12 16:21:54,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:21:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 536 transitions. [2020-10-12 16:21:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:21:54,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:21:54,432 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:21:54,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:21:54,432 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:21:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:21:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1120433546, now seen corresponding path program 50 times [2020-10-12 16:21:54,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:21:54,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993975493] [2020-10-12 16:21:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:21:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:54,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:57,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:57,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:21:57,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:57,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2850 [2020-10-12 16:21:57,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:57,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:21:57,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:21:57,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:21:57,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:59,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:21:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:21:59,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:21:59,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:21:59,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:21:59,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:21:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:21:59,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:21:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:21:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:21:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:21:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:21:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:21:59,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993975493] [2020-10-12 16:21:59,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:21:59,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:21:59,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878469128] [2020-10-12 16:21:59,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:21:59,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:21:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:21:59,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:21:59,426 INFO L87 Difference]: Start difference. First operand 489 states and 536 transitions. Second operand 53 states. [2020-10-12 16:22:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:01,125 INFO L93 Difference]: Finished difference Result 1009 states and 1124 transitions. [2020-10-12 16:22:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:22:01,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-12 16:22:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:01,128 INFO L225 Difference]: With dead ends: 1009 [2020-10-12 16:22:01,129 INFO L226 Difference]: Without dead ends: 528 [2020-10-12 16:22:01,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:22:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-12 16:22:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 497. [2020-10-12 16:22:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-12 16:22:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 544 transitions. [2020-10-12 16:22:01,175 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 544 transitions. Word has length 62 [2020-10-12 16:22:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:01,175 INFO L479 AbstractCegarLoop]: Abstraction has 497 states and 544 transitions. [2020-10-12 16:22:01,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:22:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 544 transitions. [2020-10-12 16:22:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:22:01,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:01,177 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:01,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:22:01,178 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:01,178 INFO L82 PathProgramCache]: Analyzing trace with hash 400004119, now seen corresponding path program 51 times [2020-10-12 16:22:01,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:01,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504205519] [2020-10-12 16:22:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:01,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:03,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:03,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:22:03,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:03,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-12 16:22:03,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:22:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:22:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:22:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:05,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:05,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:05,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:05,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:05,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:05,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:05,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:05,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:05,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:05,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504205519] [2020-10-12 16:22:05,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:05,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:22:05,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951119579] [2020-10-12 16:22:05,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:22:05,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:22:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:22:05,898 INFO L87 Difference]: Start difference. First operand 497 states and 544 transitions. Second operand 54 states. [2020-10-12 16:22:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:07,697 INFO L93 Difference]: Finished difference Result 1025 states and 1140 transitions. [2020-10-12 16:22:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:22:07,697 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-12 16:22:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:07,700 INFO L225 Difference]: With dead ends: 1025 [2020-10-12 16:22:07,700 INFO L226 Difference]: Without dead ends: 536 [2020-10-12 16:22:07,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:22:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-12 16:22:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 505. [2020-10-12 16:22:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 16:22:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 552 transitions. [2020-10-12 16:22:07,748 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 552 transitions. Word has length 63 [2020-10-12 16:22:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:07,748 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 552 transitions. [2020-10-12 16:22:07,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:22:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 552 transitions. [2020-10-12 16:22:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:22:07,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:07,750 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:07,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:22:07,750 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash -458471638, now seen corresponding path program 52 times [2020-10-12 16:22:07,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:07,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988532095] [2020-10-12 16:22:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3372 [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:22:11,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:22:11,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:22:11,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:13,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:13,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:13,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:13,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:13,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:13,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988532095] [2020-10-12 16:22:13,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:13,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:22:13,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628400701] [2020-10-12 16:22:13,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:22:13,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:13,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:22:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:22:13,847 INFO L87 Difference]: Start difference. First operand 505 states and 552 transitions. Second operand 57 states. [2020-10-12 16:22:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:16,100 INFO L93 Difference]: Finished difference Result 613 states and 721 transitions. [2020-10-12 16:22:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:22:16,101 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2020-10-12 16:22:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:16,104 INFO L225 Difference]: With dead ends: 613 [2020-10-12 16:22:16,104 INFO L226 Difference]: Without dead ends: 611 [2020-10-12 16:22:16,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:22:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-10-12 16:22:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 525. [2020-10-12 16:22:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-10-12 16:22:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 587 transitions. [2020-10-12 16:22:16,157 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 587 transitions. Word has length 64 [2020-10-12 16:22:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:16,158 INFO L479 AbstractCegarLoop]: Abstraction has 525 states and 587 transitions. [2020-10-12 16:22:16,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:22:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 587 transitions. [2020-10-12 16:22:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:22:16,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:16,159 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:16,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:22:16,159 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:16,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1301416329, now seen corresponding path program 53 times [2020-10-12 16:22:16,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:16,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155123003] [2020-10-12 16:22:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2617 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:22:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:22:18,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:21,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:21,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:21,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:21,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:22:21,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155123003] [2020-10-12 16:22:21,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:21,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:22:21,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725976031] [2020-10-12 16:22:21,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:22:21,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:22:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:22:21,136 INFO L87 Difference]: Start difference. First operand 525 states and 587 transitions. Second operand 56 states. [2020-10-12 16:22:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:23,046 INFO L93 Difference]: Finished difference Result 1069 states and 1207 transitions. [2020-10-12 16:22:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:22:23,047 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-12 16:22:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:23,049 INFO L225 Difference]: With dead ends: 1069 [2020-10-12 16:22:23,049 INFO L226 Difference]: Without dead ends: 552 [2020-10-12 16:22:23,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:22:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-12 16:22:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 521. [2020-10-12 16:22:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-12 16:22:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 568 transitions. [2020-10-12 16:22:23,100 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 568 transitions. Word has length 65 [2020-10-12 16:22:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:23,100 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 568 transitions. [2020-10-12 16:22:23,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:22:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 568 transitions. [2020-10-12 16:22:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:22:23,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:23,101 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:23,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:22:23,102 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:23,102 INFO L82 PathProgramCache]: Analyzing trace with hash 293905957, now seen corresponding path program 8 times [2020-10-12 16:22:23,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:23,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865657756] [2020-10-12 16:22:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:23,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:26,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:22:28,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:22:28,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 16:22:28,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:22:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:22:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:22:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:22:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:22:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:22:28,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:22:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:22:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:22:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:22:28,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:22:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:22:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 16:22:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 16:22:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:22:28,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 16:22:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:22:28,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 16:22:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:28,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-12 16:22:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:28,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:22:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:22:28,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:22:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:22:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-12 16:22:28,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865657756] [2020-10-12 16:22:28,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:22:28,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:22:28,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811927577] [2020-10-12 16:22:28,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:22:28,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:22:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:22:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:22:28,444 INFO L87 Difference]: Start difference. First operand 521 states and 568 transitions. Second operand 13 states. [2020-10-12 16:22:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:22:28,925 INFO L93 Difference]: Finished difference Result 653 states and 712 transitions. [2020-10-12 16:22:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:22:28,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-10-12 16:22:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:22:28,932 INFO L225 Difference]: With dead ends: 653 [2020-10-12 16:22:28,932 INFO L226 Difference]: Without dead ends: 646 [2020-10-12 16:22:28,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:22:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-12 16:22:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 584. [2020-10-12 16:22:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-10-12 16:22:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 637 transitions. [2020-10-12 16:22:28,985 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 637 transitions. Word has length 74 [2020-10-12 16:22:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:22:28,986 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 637 transitions. [2020-10-12 16:22:28,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:22:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 637 transitions. [2020-10-12 16:22:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:22:28,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:22:28,987 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:22:28,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:22:28,988 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:22:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:22:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1662897974, now seen corresponding path program 54 times [2020-10-12 16:22:28,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:22:28,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225822276] [2020-10-12 16:22:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:22:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:22:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking...