/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/array-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:59:06,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:59:06,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:59:06,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:59:06,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:59:06,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:59:06,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:59:06,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:59:06,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:59:06,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:59:06,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:59:06,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:59:06,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:59:06,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:59:06,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:59:06,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:59:06,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:59:06,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:59:06,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:59:06,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:59:06,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:59:06,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:59:06,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:59:06,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:59:06,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:59:06,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:59:06,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:59:06,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:59:06,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:59:06,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:59:06,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:59:06,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:59:06,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:59:06,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:59:06,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:59:06,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:59:06,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:59:06,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:59:06,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:59:06,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:59:06,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:59:06,459 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 09:59:06,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:59:06,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:59:06,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:59:06,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:59:06,504 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:59:06,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:59:06,504 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:59:06,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:59:06,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:59:06,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:59:06,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:59:06,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:59:06,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:59:06,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:59:06,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:59:06,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:59:06,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:59:06,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:59:06,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:59:06,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:59:06,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:59:06,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:59:06,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:59:06,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:59:06,510 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 09:59:06,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:59:06,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:59:06,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:59:06,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:59:06,844 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:59:06,844 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-12 09:59:06,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/717798f35/e4e068a83ff742449b75982e1b624f4a/FLAGe07df03eb [2020-10-12 09:59:07,446 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:59:07,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2020-10-12 09:59:07,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/717798f35/e4e068a83ff742449b75982e1b624f4a/FLAGe07df03eb [2020-10-12 09:59:07,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/717798f35/e4e068a83ff742449b75982e1b624f4a [2020-10-12 09:59:07,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:59:07,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:59:07,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:07,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:59:07,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:59:07,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a32a894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07, skipping insertion in model container [2020-10-12 09:59:07,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:59:07,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:59:08,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:08,041 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:59:08,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:08,085 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:59:08,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08 WrapperNode [2020-10-12 09:59:08,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:08,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:59:08,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:59:08,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:59:08,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:59:08,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:59:08,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:59:08,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:59:08,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (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 09:59:08,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:59:08,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:59:08,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:59:08,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:59:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:59:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:59:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:59:08,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:59:08,571 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:59:08,571 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 09:59:08,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:08 BoogieIcfgContainer [2020-10-12 09:59:08,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:59:08,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:59:08,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:59:08,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:59:08,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:59:07" (1/3) ... [2020-10-12 09:59:08,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22533a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:08, skipping insertion in model container [2020-10-12 09:59:08,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (2/3) ... [2020-10-12 09:59:08,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22533a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:08, skipping insertion in model container [2020-10-12 09:59:08,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:08" (3/3) ... [2020-10-12 09:59:08,590 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2020-10-12 09:59:08,602 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:59:08,610 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:59:08,625 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:59:08,664 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:59:08,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:59:08,665 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:59:08,665 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:59:08,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:59:08,668 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:59:08,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:59:08,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:59:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-12 09:59:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:59:08,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:08,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:08,708 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2020-10-12 09:59:08,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:08,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894622065] [2020-10-12 09:59:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:11,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:59:11,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:11,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-12 09:59:11,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:11,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:59:11,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:11,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:59:11,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:59:11,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:11,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:11,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:11,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:11,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:11,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:11,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:11,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:11,716 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 09:59:11,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894622065] [2020-10-12 09:59:11,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:59:11,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:59:11,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557655918] [2020-10-12 09:59:11,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:59:11,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:59:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:11,751 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-12 09:59:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:11,942 INFO L93 Difference]: Finished difference Result 80 states and 137 transitions. [2020-10-12 09:59:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:59:11,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 09:59:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:11,957 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:59:11,957 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:59:11,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:59:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:59:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:59:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-12 09:59:12,013 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-12 09:59:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:12,013 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-12 09:59:12,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:59:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-12 09:59:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:59:12,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:12,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:12,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:59:12,016 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2020-10-12 09:59:12,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:12,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108785591] [2020-10-12 09:59:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:59:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 09:59:17,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:59:17,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:59:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:59:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:59:17,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:17,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:17,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:17,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 09:59:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:59:17,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108785591] [2020-10-12 09:59:17,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:17,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:59:17,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933818816] [2020-10-12 09:59:17,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:59:17,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:59:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:17,165 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2020-10-12 09:59:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:17,428 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-12 09:59:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:59:17,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-12 09:59:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:17,430 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:59:17,430 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:59:17,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:59:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 09:59:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:59:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-12 09:59:17,457 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-12 09:59:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:17,458 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-12 09:59:17,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:59:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-12 09:59:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:59:17,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:17,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:17,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:17,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2020-10-12 09:59:17,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:17,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339198023] [2020-10-12 09:59:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:22,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:59:22,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:22,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:22,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:22,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:22,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:59:22,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:59:22,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:22,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:22,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:22,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:22,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:22,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:22,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:22,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:59:22,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339198023] [2020-10-12 09:59:22,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:22,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:59:22,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671441643] [2020-10-12 09:59:22,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:59:22,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:59:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:22,534 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-10-12 09:59:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:22,713 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-12 09:59:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:59:22,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-12 09:59:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:22,714 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:59:22,715 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:59:22,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:59:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 09:59:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:59:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-12 09:59:22,726 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2020-10-12 09:59:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:22,726 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-12 09:59:22,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:59:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-12 09:59:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:59:22,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:22,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:22,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:22,729 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2020-10-12 09:59:22,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:22,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923022711] [2020-10-12 09:59:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:22,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:22,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:27,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:59:27,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:27,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:59:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 09:59:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:59:27,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:27,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:27,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:27,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:27,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:27,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-12 09:59:27,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923022711] [2020-10-12 09:59:27,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:27,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:59:27,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139626556] [2020-10-12 09:59:27,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:59:27,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:59:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:27,824 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-12 09:59:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:28,028 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-12 09:59:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:59:28,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 09:59:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:28,031 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:59:28,031 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:59:28,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:59:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:59:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:59:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-12 09:59:28,050 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2020-10-12 09:59:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:28,051 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-12 09:59:28,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:59:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-12 09:59:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:59:28,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:28,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:28,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:28,056 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2020-10-12 09:59:28,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:28,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770303958] [2020-10-12 09:59:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:33,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:59:33,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:59:33,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:59:33,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 09:59:33,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:33,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:33,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:33,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:33,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:33,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:33,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-12 09:59:33,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770303958] [2020-10-12 09:59:33,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:33,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:59:33,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474208717] [2020-10-12 09:59:33,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:59:33,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:59:33,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:33,197 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-12 09:59:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:33,414 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-12 09:59:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:59:33,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 09:59:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:33,416 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:59:33,417 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:59:33,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:59:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 09:59:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:59:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-12 09:59:33,434 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2020-10-12 09:59:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:33,435 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-12 09:59:33,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:59:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-12 09:59:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:59:33,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:33,441 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:33,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:33,442 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2020-10-12 09:59:33,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:33,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144094502] [2020-10-12 09:59:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:38,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:59:38,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:38,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:38,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:38,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:59:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 09:59:38,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:59:38,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:38,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:38,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:38,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:38,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:38,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:38,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:38,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:38,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:38,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:59:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-12 09:59:38,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144094502] [2020-10-12 09:59:38,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:38,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:59:38,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576762834] [2020-10-12 09:59:38,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:59:38,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:38,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:59:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:38,582 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2020-10-12 09:59:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:38,806 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-12 09:59:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:59:38,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-12 09:59:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:38,808 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:59:38,808 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:59:38,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:59:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 09:59:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:59:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-12 09:59:38,817 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2020-10-12 09:59:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:38,818 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-12 09:59:38,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:59:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-12 09:59:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:59:38,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:38,819 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:38,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:38,820 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2020-10-12 09:59:38,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:38,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840768155] [2020-10-12 09:59:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:43,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:59:43,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:43,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:43,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:43,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:59:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:59:43,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:59:43,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:43,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:43,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:43,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:43,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-12 09:59:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840768155] [2020-10-12 09:59:43,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:43,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:43,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867192938] [2020-10-12 09:59:43,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:43,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:43,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:43,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:43,940 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-12 09:59:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:44,238 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-12 09:59:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:59:44,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-12 09:59:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:44,240 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:59:44,240 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 09:59:44,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 09:59:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-12 09:59:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:59:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-12 09:59:44,250 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2020-10-12 09:59:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:44,251 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-12 09:59:44,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-12 09:59:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:59:44,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:44,252 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:44,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:44,253 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:44,253 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2020-10-12 09:59:44,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:44,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033021987] [2020-10-12 09:59:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:44,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:49,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:59:49,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:49,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:59:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:49,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-12 09:59:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033021987] [2020-10-12 09:59:49,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:49,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:49,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525536810] [2020-10-12 09:59:49,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:49,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:49,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:49,376 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2020-10-12 09:59:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:49,683 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-12 09:59:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:49,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-10-12 09:59:49,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:49,685 INFO L225 Difference]: With dead ends: 189 [2020-10-12 09:59:49,686 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:59:49,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:59:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 09:59:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 09:59:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-12 09:59:49,698 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2020-10-12 09:59:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:49,699 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-12 09:59:49,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-12 09:59:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 09:59:49,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:49,700 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:49,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:49,701 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2020-10-12 09:59:49,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:49,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383559703] [2020-10-12 09:59:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:59:54,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:54,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:54,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-12 09:59:54,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383559703] [2020-10-12 09:59:54,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:54,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:54,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313036687] [2020-10-12 09:59:54,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:54,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:54,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:54,857 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-12 09:59:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:55,236 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2020-10-12 09:59:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:59:55,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-12 09:59:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:55,238 INFO L225 Difference]: With dead ends: 206 [2020-10-12 09:59:55,238 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:59:55,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:59:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-12 09:59:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:59:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-12 09:59:55,266 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2020-10-12 09:59:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:55,267 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-12 09:59:55,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-12 09:59:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:59:55,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:55,273 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:55,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:55,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2020-10-12 09:59:55,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:55,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65545435] [2020-10-12 09:59:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:55,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:00:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 10:00:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:00:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:00,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:00,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-12 10:00:00,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65545435] [2020-10-12 10:00:00,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:00,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:00:00,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994158213] [2020-10-12 10:00:00,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:00:00,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:00,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:00:00,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:00:00,458 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 13 states. [2020-10-12 10:00:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:00,763 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-12 10:00:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:00:00,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-10-12 10:00:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:00,765 INFO L225 Difference]: With dead ends: 223 [2020-10-12 10:00:00,766 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 10:00:00,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:00:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 10:00:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-12 10:00:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:00:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-12 10:00:00,793 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-10-12 10:00:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:00,793 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-12 10:00:00,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:00:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-12 10:00:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 10:00:00,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:00,799 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:00,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:00:00,799 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:00,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2020-10-12 10:00:00,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:00,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681030304] [2020-10-12 10:00:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:00:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:05,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:05,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:05,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:05,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:05,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-12 10:00:05,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681030304] [2020-10-12 10:00:05,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:05,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:00:05,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519694644] [2020-10-12 10:00:05,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:00:05,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:00:05,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:05,971 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2020-10-12 10:00:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:06,297 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-12 10:00:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:00:06,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-12 10:00:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:06,299 INFO L225 Difference]: With dead ends: 240 [2020-10-12 10:00:06,299 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 10:00:06,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 10:00:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-12 10:00:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 10:00:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-12 10:00:06,307 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2020-10-12 10:00:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:06,308 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-12 10:00:06,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:00:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-12 10:00:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 10:00:06,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:06,310 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:06,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:00:06,310 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:06,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2020-10-12 10:00:06,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:06,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548041318] [2020-10-12 10:00:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:11,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:11,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 10:00:11,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:00:11,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:00:11,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-12 10:00:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:00:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:11,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:11,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:11,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:11,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:11,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-12 10:00:11,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548041318] [2020-10-12 10:00:11,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:11,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:00:11,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566316833] [2020-10-12 10:00:11,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:00:11,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:00:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:11,504 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2020-10-12 10:00:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:11,872 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2020-10-12 10:00:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:00:11,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2020-10-12 10:00:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:11,874 INFO L225 Difference]: With dead ends: 257 [2020-10-12 10:00:11,875 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:00:11,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:00:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 10:00:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 10:00:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-12 10:00:11,885 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2020-10-12 10:00:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:11,885 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-12 10:00:11,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:00:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-12 10:00:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 10:00:11,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:11,886 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:11,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:11,886 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2020-10-12 10:00:11,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:11,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827016831] [2020-10-12 10:00:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:11,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:16,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:00:16,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-12 10:00:17,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827016831] [2020-10-12 10:00:17,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:17,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:17,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381970423] [2020-10-12 10:00:17,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:17,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:17,077 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2020-10-12 10:00:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:17,468 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-10-12 10:00:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:00:17,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-12 10:00:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:17,471 INFO L225 Difference]: With dead ends: 274 [2020-10-12 10:00:17,471 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 10:00:17,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 10:00:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-12 10:00:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 10:00:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2020-10-12 10:00:17,485 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2020-10-12 10:00:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:17,486 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2020-10-12 10:00:17,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2020-10-12 10:00:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 10:00:17,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:17,488 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:17,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:17,488 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2020-10-12 10:00:17,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:17,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798157901] [2020-10-12 10:00:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:22,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 10:00:22,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:22,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:00:22,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 10:00:22,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:00:22,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:22,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:22,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:22,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:22,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-12 10:00:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798157901] [2020-10-12 10:00:22,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:22,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:00:22,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654282204] [2020-10-12 10:00:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:00:22,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:00:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:22,704 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2020-10-12 10:00:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:23,149 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-12 10:00:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:00:23,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2020-10-12 10:00:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:23,151 INFO L225 Difference]: With dead ends: 291 [2020-10-12 10:00:23,151 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:00:23,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:00:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 10:00:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 10:00:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-12 10:00:23,168 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2020-10-12 10:00:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:23,169 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-12 10:00:23,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:00:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-12 10:00:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 10:00:23,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:23,171 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:23,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:23,172 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2020-10-12 10:00:23,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:23,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731600255] [2020-10-12 10:00:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:28,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 10:00:28,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:00:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:28,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:28,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:28,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:28,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:28,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:28,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-12 10:00:28,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731600255] [2020-10-12 10:00:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:28,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012820480] [2020-10-12 10:00:28,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:28,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:28,419 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2020-10-12 10:00:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:28,840 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-10-12 10:00:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:00:28,840 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-12 10:00:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:28,842 INFO L225 Difference]: With dead ends: 308 [2020-10-12 10:00:28,842 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 10:00:28,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 10:00:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-12 10:00:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 10:00:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-12 10:00:28,853 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2020-10-12 10:00:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:28,853 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-12 10:00:28,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-12 10:00:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 10:00:28,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:28,855 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:28,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:28,856 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2020-10-12 10:00:28,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:28,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132978236] [2020-10-12 10:00:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:33,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:34,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:34,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:34,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:34,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:34,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:34,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-12 10:00:34,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132978236] [2020-10-12 10:00:34,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:34,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:34,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436319878] [2020-10-12 10:00:34,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:34,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:34,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:34,104 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 19 states. [2020-10-12 10:00:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:34,516 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2020-10-12 10:00:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:34,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 164 [2020-10-12 10:00:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:34,519 INFO L225 Difference]: With dead ends: 325 [2020-10-12 10:00:34,519 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 10:00:34,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 10:00:34,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-12 10:00:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 10:00:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-12 10:00:34,529 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2020-10-12 10:00:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:34,530 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-12 10:00:34,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-12 10:00:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 10:00:34,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:34,532 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:34,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:34,532 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2020-10-12 10:00:34,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:34,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820637732] [2020-10-12 10:00:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:39,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 10:00:39,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:39,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:39,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:39,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:39,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:39,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-12 10:00:39,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820637732] [2020-10-12 10:00:39,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:39,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:39,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879454345] [2020-10-12 10:00:39,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:39,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:39,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:39,818 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2020-10-12 10:00:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:40,319 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-10-12 10:00:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:40,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2020-10-12 10:00:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:40,321 INFO L225 Difference]: With dead ends: 342 [2020-10-12 10:00:40,321 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 10:00:40,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 10:00:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 10:00:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 10:00:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-10-12 10:00:40,338 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2020-10-12 10:00:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:40,338 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-10-12 10:00:40,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-10-12 10:00:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 10:00:40,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:40,341 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:40,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:40,341 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2020-10-12 10:00:40,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:40,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764859336] [2020-10-12 10:00:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:40,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:45,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:45,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:00:45,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:45,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:45,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:45,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:45,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-12 10:00:45,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764859336] [2020-10-12 10:00:45,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:45,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:45,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305009919] [2020-10-12 10:00:45,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:45,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:45,657 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2020-10-12 10:00:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:46,180 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2020-10-12 10:00:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:00:46,181 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-10-12 10:00:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:46,183 INFO L225 Difference]: With dead ends: 359 [2020-10-12 10:00:46,183 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 10:00:46,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 10:00:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-12 10:00:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 10:00:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-12 10:00:46,194 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2020-10-12 10:00:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:46,195 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-12 10:00:46,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-12 10:00:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-12 10:00:46,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:46,197 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:46,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:46,198 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2020-10-12 10:00:46,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:46,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787882196] [2020-10-12 10:00:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:46,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:51,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:51,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:00:51,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:51,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:51,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-12 10:00:51,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787882196] [2020-10-12 10:00:51,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:51,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:51,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114673362] [2020-10-12 10:00:51,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:51,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:51,570 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2020-10-12 10:00:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:52,106 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2020-10-12 10:00:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:52,106 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-12 10:00:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:52,108 INFO L225 Difference]: With dead ends: 376 [2020-10-12 10:00:52,108 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 10:00:52,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 10:00:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-12 10:00:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 10:00:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2020-10-12 10:00:52,119 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2020-10-12 10:00:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:52,120 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2020-10-12 10:00:52,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2020-10-12 10:00:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-12 10:00:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:52,121 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:52,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:52,122 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2020-10-12 10:00:52,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:52,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301134058] [2020-10-12 10:00:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:57,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:57,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:00:57,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:00:57,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:57,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:57,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:57,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:57,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:57,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-12 10:00:57,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301134058] [2020-10-12 10:00:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:57,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361743035] [2020-10-12 10:00:57,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:57,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:57,493 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2020-10-12 10:00:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:57,992 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2020-10-12 10:00:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:57,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-10-12 10:00:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:57,994 INFO L225 Difference]: With dead ends: 393 [2020-10-12 10:00:57,994 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 10:00:57,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 10:00:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-12 10:00:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 10:00:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-12 10:00:58,005 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2020-10-12 10:00:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:58,005 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-12 10:00:58,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-12 10:00:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 10:00:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:58,007 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:58,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:58,007 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2020-10-12 10:00:58,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642982703] [2020-10-12 10:00:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:03,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:03,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:01:03,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:03,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:03,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:03,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:03,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:03,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-12 10:01:03,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642982703] [2020-10-12 10:01:03,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:03,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:01:03,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771863689] [2020-10-12 10:01:03,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:01:03,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:01:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:03,397 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2020-10-12 10:01:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:03,923 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2020-10-12 10:01:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:01:03,924 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-12 10:01:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:03,925 INFO L225 Difference]: With dead ends: 410 [2020-10-12 10:01:03,925 INFO L226 Difference]: Without dead ends: 223 [2020-10-12 10:01:03,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-12 10:01:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-12 10:01:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 10:01:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-12 10:01:03,935 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2020-10-12 10:01:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:03,936 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-12 10:01:03,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:01:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-12 10:01:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-12 10:01:03,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:03,937 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:03,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:01:03,938 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2020-10-12 10:01:03,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:03,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623763724] [2020-10-12 10:01:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:01:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-12 10:01:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:01:08,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:09,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-12 10:01:09,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623763724] [2020-10-12 10:01:09,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:09,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:01:09,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732259706] [2020-10-12 10:01:09,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:01:09,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:01:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:09,345 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2020-10-12 10:01:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:09,931 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2020-10-12 10:01:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:01:09,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-10-12 10:01:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:09,933 INFO L225 Difference]: With dead ends: 427 [2020-10-12 10:01:09,933 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 10:01:09,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 10:01:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 10:01:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:01:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-12 10:01:09,945 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2020-10-12 10:01:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:09,945 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-12 10:01:09,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:01:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-12 10:01:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 10:01:09,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:09,948 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:09,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:09,948 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2020-10-12 10:01:09,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:09,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107953874] [2020-10-12 10:01:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:10,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:10,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:14,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:15,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:15,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:15,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:15,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:15,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:15,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:15,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:15,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:15,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:15,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:15,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-12 10:01:15,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107953874] [2020-10-12 10:01:15,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:15,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:15,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311804775] [2020-10-12 10:01:15,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:15,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:15,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:15,576 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2020-10-12 10:01:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:16,208 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2020-10-12 10:01:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:16,208 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2020-10-12 10:01:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:16,210 INFO L225 Difference]: With dead ends: 444 [2020-10-12 10:01:16,210 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 10:01:16,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 10:01:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-12 10:01:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 10:01:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2020-10-12 10:01:16,221 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2020-10-12 10:01:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:16,221 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2020-10-12 10:01:16,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2020-10-12 10:01:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-12 10:01:16,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:16,224 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:16,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:16,224 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:16,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2020-10-12 10:01:16,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:16,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414045838] [2020-10-12 10:01:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:21,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:21,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-12 10:01:21,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:21,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:21,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:21,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:21,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-12 10:01:21,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414045838] [2020-10-12 10:01:21,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:21,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:21,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202734486] [2020-10-12 10:01:21,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:21,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:21,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:21,846 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2020-10-12 10:01:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:22,449 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2020-10-12 10:01:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:22,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2020-10-12 10:01:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:22,451 INFO L225 Difference]: With dead ends: 461 [2020-10-12 10:01:22,451 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 10:01:22,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 10:01:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-12 10:01:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 10:01:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-12 10:01:22,462 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2020-10-12 10:01:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:22,462 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-12 10:01:22,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-12 10:01:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-12 10:01:22,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:22,464 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:22,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:22,468 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2020-10-12 10:01:22,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:22,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947201422] [2020-10-12 10:01:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:22,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:22,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:22,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:27,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:27,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-12 10:01:27,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:27,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:27,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:27,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:27,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:27,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:27,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:27,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:27,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-12 10:01:28,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947201422] [2020-10-12 10:01:28,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:28,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:28,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365609573] [2020-10-12 10:01:28,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:28,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:28,007 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2020-10-12 10:01:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:28,661 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2020-10-12 10:01:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:28,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2020-10-12 10:01:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:28,664 INFO L225 Difference]: With dead ends: 478 [2020-10-12 10:01:28,664 INFO L226 Difference]: Without dead ends: 259 [2020-10-12 10:01:28,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-12 10:01:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-12 10:01:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 10:01:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-12 10:01:28,674 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2020-10-12 10:01:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:28,674 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-12 10:01:28,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-12 10:01:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-12 10:01:28,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:28,676 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:28,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:28,677 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2020-10-12 10:01:28,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:28,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363930998] [2020-10-12 10:01:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:28,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-12 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-12 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:34,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:34,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:34,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:34,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:34,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:34,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:34,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:34,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:34,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:01:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-12 10:01:34,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363930998] [2020-10-12 10:01:34,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:34,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:34,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455283151] [2020-10-12 10:01:34,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:34,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:34,327 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2020-10-12 10:01:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:35,056 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2020-10-12 10:01:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:35,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2020-10-12 10:01:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:35,059 INFO L225 Difference]: With dead ends: 495 [2020-10-12 10:01:35,059 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 10:01:35,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 10:01:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-12 10:01:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 10:01:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-12 10:01:35,070 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2020-10-12 10:01:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-12 10:01:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-12 10:01:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-12 10:01:35,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:35,072 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:35,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:35,073 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2020-10-12 10:01:35,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153137711] [2020-10-12 10:01:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:40,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:40,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:40,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-12 10:01:40,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153137711] [2020-10-12 10:01:40,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:40,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206944958] [2020-10-12 10:01:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:40,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:40,716 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2020-10-12 10:01:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:41,473 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2020-10-12 10:01:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:41,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-12 10:01:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:41,476 INFO L225 Difference]: With dead ends: 512 [2020-10-12 10:01:41,476 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 10:01:41,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 10:01:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-12 10:01:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 10:01:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-12 10:01:41,487 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2020-10-12 10:01:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:41,488 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-12 10:01:41,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-12 10:01:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-12 10:01:41,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:41,490 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:41,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:41,490 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2020-10-12 10:01:41,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:41,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415934592] [2020-10-12 10:01:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:46,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:46,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-12 10:01:46,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:46,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 10:01:46,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-12 10:01:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:47,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:47,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:47,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:47,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:47,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:47,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:47,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:47,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:47,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-12 10:01:47,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415934592] [2020-10-12 10:01:47,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:47,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:47,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201993160] [2020-10-12 10:01:47,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:47,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:47,181 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 31 states. [2020-10-12 10:01:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:47,817 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2020-10-12 10:01:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:47,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 272 [2020-10-12 10:01:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:47,819 INFO L225 Difference]: With dead ends: 529 [2020-10-12 10:01:47,819 INFO L226 Difference]: Without dead ends: 286 [2020-10-12 10:01:47,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-12 10:01:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-12 10:01:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 10:01:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-12 10:01:47,829 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2020-10-12 10:01:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:47,829 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-12 10:01:47,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-12 10:01:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-12 10:01:47,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:47,831 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:47,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:47,831 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2020-10-12 10:01:47,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:47,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606292905] [2020-10-12 10:01:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:47,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-12 10:01:52,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:01:52,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:53,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:53,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:53,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:53,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:53,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:53,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:53,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:53,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:53,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:53,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:53,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-12 10:01:53,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606292905] [2020-10-12 10:01:53,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:53,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:53,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230888173] [2020-10-12 10:01:53,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:53,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:53,557 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2020-10-12 10:01:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:54,348 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2020-10-12 10:01:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:01:54,349 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2020-10-12 10:01:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:54,351 INFO L225 Difference]: With dead ends: 546 [2020-10-12 10:01:54,351 INFO L226 Difference]: Without dead ends: 295 [2020-10-12 10:01:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-12 10:01:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-12 10:01:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-12 10:01:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2020-10-12 10:01:54,361 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2020-10-12 10:01:54,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:54,361 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2020-10-12 10:01:54,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2020-10-12 10:01:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-12 10:01:54,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:54,364 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:54,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:54,364 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2020-10-12 10:01:54,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:54,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19756538] [2020-10-12 10:01:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:54,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:59,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:59,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:01:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:00,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:00,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:00,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:00,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:00,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:00,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:00,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:00,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:00,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:00,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-12 10:02:00,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19756538] [2020-10-12 10:02:00,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:00,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:02:00,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362208195] [2020-10-12 10:02:00,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:02:00,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:00,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:02:00,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:00,075 INFO L87 Difference]: Start difference. First operand 295 states and 304 transitions. Second operand 33 states. [2020-10-12 10:02:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:00,915 INFO L93 Difference]: Finished difference Result 563 states and 589 transitions. [2020-10-12 10:02:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:02:00,916 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 290 [2020-10-12 10:02:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:00,918 INFO L225 Difference]: With dead ends: 563 [2020-10-12 10:02:00,918 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:02:00,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:02:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-12 10:02:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-12 10:02:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-12 10:02:00,928 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 290 [2020-10-12 10:02:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:00,929 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-12 10:02:00,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:02:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-12 10:02:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-12 10:02:00,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:00,931 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:00,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:02:00,932 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1369838126, now seen corresponding path program 30 times [2020-10-12 10:02:00,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:00,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552578145] [2020-10-12 10:02:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:06,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:06,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:06,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:06,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:06,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:06,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:06,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:06,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:06,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:06,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:06,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:06,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:06,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-12 10:02:06,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552578145] [2020-10-12 10:02:06,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:06,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:06,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118103756] [2020-10-12 10:02:06,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:06,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:06,717 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 34 states. [2020-10-12 10:02:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:07,552 INFO L93 Difference]: Finished difference Result 580 states and 606 transitions. [2020-10-12 10:02:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:07,553 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 299 [2020-10-12 10:02:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:07,556 INFO L225 Difference]: With dead ends: 580 [2020-10-12 10:02:07,556 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 10:02:07,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 10:02:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2020-10-12 10:02:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 10:02:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 322 transitions. [2020-10-12 10:02:07,566 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 322 transitions. Word has length 299 [2020-10-12 10:02:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:07,567 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 322 transitions. [2020-10-12 10:02:07,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 322 transitions. [2020-10-12 10:02:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-12 10:02:07,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:07,569 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:07,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:02:07,569 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1043750074, now seen corresponding path program 31 times [2020-10-12 10:02:07,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:07,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978384909] [2020-10-12 10:02:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:12,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:12,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:13,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:13,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:13,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:13,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-12 10:02:13,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978384909] [2020-10-12 10:02:13,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:13,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:13,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765651971] [2020-10-12 10:02:13,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:13,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:13,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:13,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:13,343 INFO L87 Difference]: Start difference. First operand 313 states and 322 transitions. Second operand 35 states. [2020-10-12 10:02:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:14,092 INFO L93 Difference]: Finished difference Result 597 states and 623 transitions. [2020-10-12 10:02:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:14,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 308 [2020-10-12 10:02:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:14,095 INFO L225 Difference]: With dead ends: 597 [2020-10-12 10:02:14,095 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 10:02:14,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 10:02:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-12 10:02:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-12 10:02:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-12 10:02:14,107 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 308 [2020-10-12 10:02:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:14,107 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-12 10:02:14,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-12 10:02:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 10:02:14,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:14,110 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:14,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:02:14,110 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1909990098, now seen corresponding path program 32 times [2020-10-12 10:02:14,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:14,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363556753] [2020-10-12 10:02:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:19,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-12 10:02:19,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:19,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:19,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:19,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:19,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:19,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-12 10:02:19,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363556753] [2020-10-12 10:02:19,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:19,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:19,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419299204] [2020-10-12 10:02:19,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:19,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:19,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:19,967 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 36 states. [2020-10-12 10:02:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:20,851 INFO L93 Difference]: Finished difference Result 614 states and 640 transitions. [2020-10-12 10:02:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:20,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 317 [2020-10-12 10:02:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:20,853 INFO L225 Difference]: With dead ends: 614 [2020-10-12 10:02:20,853 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 10:02:20,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 10:02:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-12 10:02:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-12 10:02:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 340 transitions. [2020-10-12 10:02:20,863 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 340 transitions. Word has length 317 [2020-10-12 10:02:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:20,863 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 340 transitions. [2020-10-12 10:02:20,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 340 transitions. [2020-10-12 10:02:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-12 10:02:20,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:20,866 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:20,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:20,866 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1823841606, now seen corresponding path program 33 times [2020-10-12 10:02:20,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:20,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081906537] [2020-10-12 10:02:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:25,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:25,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-12 10:02:25,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:25,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-12 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:25,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:26,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:26,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:26,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:26,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-12 10:02:26,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081906537] [2020-10-12 10:02:26,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:26,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:26,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885773226] [2020-10-12 10:02:26,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:26,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:26,774 INFO L87 Difference]: Start difference. First operand 331 states and 340 transitions. Second operand 37 states. [2020-10-12 10:02:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:27,683 INFO L93 Difference]: Finished difference Result 631 states and 657 transitions. [2020-10-12 10:02:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:27,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 326 [2020-10-12 10:02:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:27,686 INFO L225 Difference]: With dead ends: 631 [2020-10-12 10:02:27,686 INFO L226 Difference]: Without dead ends: 340 [2020-10-12 10:02:27,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-12 10:02:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-12 10:02:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-12 10:02:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-12 10:02:27,696 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 326 [2020-10-12 10:02:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:27,697 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-12 10:02:27,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-12 10:02:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-12 10:02:27,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:27,699 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:27,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:27,699 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 359880658, now seen corresponding path program 34 times [2020-10-12 10:02:27,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:27,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235894013] [2020-10-12 10:02:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:27,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:32,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:02:32,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-12 10:02:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:02:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:33,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:33,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:33,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:33,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:33,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:33,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-12 10:02:33,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235894013] [2020-10-12 10:02:33,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:33,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:02:33,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692808685] [2020-10-12 10:02:33,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:02:33,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:02:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:33,595 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 38 states. [2020-10-12 10:02:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:34,403 INFO L93 Difference]: Finished difference Result 648 states and 674 transitions. [2020-10-12 10:02:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:02:34,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 335 [2020-10-12 10:02:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:34,405 INFO L225 Difference]: With dead ends: 648 [2020-10-12 10:02:34,405 INFO L226 Difference]: Without dead ends: 349 [2020-10-12 10:02:34,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-12 10:02:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2020-10-12 10:02:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 10:02:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 358 transitions. [2020-10-12 10:02:34,416 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 358 transitions. Word has length 335 [2020-10-12 10:02:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:34,416 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 358 transitions. [2020-10-12 10:02:34,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:02:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 358 transitions. [2020-10-12 10:02:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-12 10:02:34,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:34,419 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:34,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:34,419 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash 673507514, now seen corresponding path program 35 times [2020-10-12 10:02:34,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:34,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901887746] [2020-10-12 10:02:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:39,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-12 10:02:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:02:39,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:40,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:40,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-12 10:02:40,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901887746] [2020-10-12 10:02:40,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:40,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:02:40,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925036913] [2020-10-12 10:02:40,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:02:40,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:02:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:40,387 INFO L87 Difference]: Start difference. First operand 349 states and 358 transitions. Second operand 39 states. [2020-10-12 10:02:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:41,231 INFO L93 Difference]: Finished difference Result 665 states and 691 transitions. [2020-10-12 10:02:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:02:41,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 344 [2020-10-12 10:02:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:41,234 INFO L225 Difference]: With dead ends: 665 [2020-10-12 10:02:41,235 INFO L226 Difference]: Without dead ends: 358 [2020-10-12 10:02:41,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-12 10:02:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-10-12 10:02:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-12 10:02:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-12 10:02:41,243 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 344 [2020-10-12 10:02:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:41,244 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-12 10:02:41,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:02:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-12 10:02:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-12 10:02:41,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:41,246 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:41,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:41,247 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 287542482, now seen corresponding path program 36 times [2020-10-12 10:02:41,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:41,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693449512] [2020-10-12 10:02:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:02:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-12 10:02:46,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:02:46,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:47,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:47,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:47,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-12 10:02:47,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693449512] [2020-10-12 10:02:47,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:47,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:02:47,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361820319] [2020-10-12 10:02:47,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:02:47,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:47,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:02:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:47,240 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 40 states. [2020-10-12 10:02:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:48,244 INFO L93 Difference]: Finished difference Result 682 states and 708 transitions. [2020-10-12 10:02:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:02:48,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 353 [2020-10-12 10:02:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:48,246 INFO L225 Difference]: With dead ends: 682 [2020-10-12 10:02:48,246 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 10:02:48,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 10:02:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-10-12 10:02:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 10:02:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 376 transitions. [2020-10-12 10:02:48,256 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 376 transitions. Word has length 353 [2020-10-12 10:02:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:48,256 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 376 transitions. [2020-10-12 10:02:48,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:02:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 376 transitions. [2020-10-12 10:02:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-12 10:02:48,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:48,259 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:48,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:48,260 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:48,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2108821830, now seen corresponding path program 37 times [2020-10-12 10:02:48,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:48,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199014901] [2020-10-12 10:02:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:53,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:02:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:54,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:54,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:54,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:54,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:54,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:54,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:54,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:54,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6327 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-10-12 10:02:54,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199014901] [2020-10-12 10:02:54,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:54,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:02:54,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582841778] [2020-10-12 10:02:54,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:02:54,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:54,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:02:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:54,299 INFO L87 Difference]: Start difference. First operand 367 states and 376 transitions. Second operand 41 states. [2020-10-12 10:02:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:55,370 INFO L93 Difference]: Finished difference Result 699 states and 725 transitions. [2020-10-12 10:02:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:02:55,371 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 362 [2020-10-12 10:02:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:55,373 INFO L225 Difference]: With dead ends: 699 [2020-10-12 10:02:55,373 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 10:02:55,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 10:02:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-12 10:02:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-12 10:02:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-12 10:02:55,383 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 362 [2020-10-12 10:02:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:55,384 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-12 10:02:55,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:02:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-12 10:02:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-12 10:02:55,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:55,387 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:55,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:55,387 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1222689234, now seen corresponding path program 38 times [2020-10-12 10:02:55,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:55,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690006224] [2020-10-12 10:02:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:00,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:00,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:03:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:01,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:01,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:01,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:01,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:01,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:01,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:01,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6669 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5928 trivial. 0 not checked. [2020-10-12 10:03:01,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690006224] [2020-10-12 10:03:01,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:03:01,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012267380] [2020-10-12 10:03:01,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:03:01,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:03:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:03:01,544 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 42 states. [2020-10-12 10:03:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:02,470 INFO L93 Difference]: Finished difference Result 716 states and 742 transitions. [2020-10-12 10:03:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:03:02,470 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 371 [2020-10-12 10:03:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:02,473 INFO L225 Difference]: With dead ends: 716 [2020-10-12 10:03:02,473 INFO L226 Difference]: Without dead ends: 385 [2020-10-12 10:03:02,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:03:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-12 10:03:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-10-12 10:03:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-12 10:03:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 394 transitions. [2020-10-12 10:03:02,482 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 394 transitions. Word has length 371 [2020-10-12 10:03:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:02,482 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 394 transitions. [2020-10-12 10:03:02,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:03:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 394 transitions. [2020-10-12 10:03:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-12 10:03:02,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:02,485 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:02,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:03:02,485 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 458060986, now seen corresponding path program 39 times [2020-10-12 10:03:02,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:02,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634153518] [2020-10-12 10:03:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:07,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:07,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 388 [2020-10-12 10:03:07,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:03:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:03:07,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:03:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-12 10:03:07,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:03:07,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:08,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:08,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:08,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:08,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7020 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 6240 trivial. 0 not checked. [2020-10-12 10:03:08,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634153518] [2020-10-12 10:03:08,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:08,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:03:08,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312409890] [2020-10-12 10:03:08,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:03:08,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:03:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:08,679 INFO L87 Difference]: Start difference. First operand 385 states and 394 transitions. Second operand 43 states. [2020-10-12 10:03:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:09,773 INFO L93 Difference]: Finished difference Result 733 states and 759 transitions. [2020-10-12 10:03:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:03:09,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 380 [2020-10-12 10:03:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:09,776 INFO L225 Difference]: With dead ends: 733 [2020-10-12 10:03:09,776 INFO L226 Difference]: Without dead ends: 394 [2020-10-12 10:03:09,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-12 10:03:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2020-10-12 10:03:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-12 10:03:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 403 transitions. [2020-10-12 10:03:09,786 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 403 transitions. Word has length 380 [2020-10-12 10:03:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:09,787 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 403 transitions. [2020-10-12 10:03:09,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:03:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 403 transitions. [2020-10-12 10:03:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-12 10:03:09,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:09,789 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:09,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:03:09,790 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1935477038, now seen corresponding path program 40 times [2020-10-12 10:03:09,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:09,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369690690] [2020-10-12 10:03:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:09,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:11,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking...