/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:19:30,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:19:30,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:19:30,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:19:30,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:19:30,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:19:30,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:19:30,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:19:30,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:19:30,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:19:30,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:19:30,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:19:30,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:19:30,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:19:30,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:19:30,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:19:30,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:19:30,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:19:30,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:19:30,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:19:30,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:19:30,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:19:30,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:19:30,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:19:30,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:19:30,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:19:30,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:19:30,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:19:30,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:19:30,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:19:30,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:19:30,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:19:30,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:19:30,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:19:30,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:19:30,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:19:30,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:19:30,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:19:30,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:19:30,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:19:30,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:19:30,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:19:30,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:19:30,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:19:30,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:19:30,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:19:30,458 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:19:30,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:19:30,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:19:30,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:19:30,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:19:30,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:19:30,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:19:30,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:19:30,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:19:30,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:19:30,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:19:30,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:19:30,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:19:30,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:19:30,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:19:30,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:19:30,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:19:30,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:19:30,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:19:30,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:19:30,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:19:30,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:19:30,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:19:30,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:19:30,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:19:30,780 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:19:30,780 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:19:30,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3205c9397/15c280a4d54c4542b4a3ff28a15313fb/FLAGc4042f8c4 [2020-10-13 14:19:31,361 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:19:31,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:19:31,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3205c9397/15c280a4d54c4542b4a3ff28a15313fb/FLAGc4042f8c4 [2020-10-13 14:19:31,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3205c9397/15c280a4d54c4542b4a3ff28a15313fb [2020-10-13 14:19:31,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:19:31,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:19:31,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:19:31,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:19:31,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:19:31,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:19:31" (1/1) ... [2020-10-13 14:19:31,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:31, skipping insertion in model container [2020-10-13 14:19:31,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:19:31" (1/1) ... [2020-10-13 14:19:31,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:19:31,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:19:32,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:19:32,305 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:19:32,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:19:32,428 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:19:32,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32 WrapperNode [2020-10-13 14:19:32,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:19:32,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:19:32,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:19:32,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:19:32,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... [2020-10-13 14:19:32,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:19:32,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:19:32,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:19:32,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:19:32,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:19:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:19:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:19:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:19:32,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:19:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:19:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:19:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:19:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:19:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:19:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:19:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:19:33,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:19:33,360 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:19:33,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:19:33 BoogieIcfgContainer [2020-10-13 14:19:33,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:19:33,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:19:33,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:19:33,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:19:33,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:19:31" (1/3) ... [2020-10-13 14:19:33,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304afbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:19:33, skipping insertion in model container [2020-10-13 14:19:33,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:19:32" (2/3) ... [2020-10-13 14:19:33,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304afbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:19:33, skipping insertion in model container [2020-10-13 14:19:33,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:19:33" (3/3) ... [2020-10-13 14:19:33,376 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:19:33,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:19:33,398 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:19:33,413 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:19:33,442 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:19:33,442 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:19:33,442 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:19:33,442 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:19:33,443 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:19:33,443 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:19:33,443 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:19:33,443 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:19:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states. [2020-10-13 14:19:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:19:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:33,485 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, 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, 1, 1, 1, 1] [2020-10-13 14:19:33,485 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash 289215473, now seen corresponding path program 1 times [2020-10-13 14:19:33,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:33,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522644133] [2020-10-13 14:19:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:34,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:38,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:38,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:19:38,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:19:38,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 14:19:38,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 14:19:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 14:19:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:19:39,166 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:19:39,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:39,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:39,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:39,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:39,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:39,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:19:39,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:39,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:39,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:39,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:39,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:19:39,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522644133] [2020-10-13 14:19:39,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:39,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:39,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994615346] [2020-10-13 14:19:39,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:39,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:39,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:39,264 INFO L87 Difference]: Start difference. First operand 155 states. Second operand 7 states. [2020-10-13 14:19:39,553 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:19:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:40,827 INFO L93 Difference]: Finished difference Result 756 states and 1212 transitions. [2020-10-13 14:19:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:40,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-13 14:19:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:40,850 INFO L225 Difference]: With dead ends: 756 [2020-10-13 14:19:40,851 INFO L226 Difference]: Without dead ends: 623 [2020-10-13 14:19:40,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-13 14:19:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 308. [2020-10-13 14:19:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 14:19:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 450 transitions. [2020-10-13 14:19:40,943 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 450 transitions. Word has length 80 [2020-10-13 14:19:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:40,944 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 450 transitions. [2020-10-13 14:19:40,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 450 transitions. [2020-10-13 14:19:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:19:40,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:40,948 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, 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, 1, 1, 1, 1, 1] [2020-10-13 14:19:40,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:19:40,948 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1221722817, now seen corresponding path program 1 times [2020-10-13 14:19:40,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:40,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967621168] [2020-10-13 14:19:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:41,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:41,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:42,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:43,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:44,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:44,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:45,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:45,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:19:45,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:19:45,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:19:45,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:46,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:46,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:19:46,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:19:46,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:19:46,254 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:19:46,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:46,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:46,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:46,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:46,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:19:46,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:19:46,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967621168] [2020-10-13 14:19:46,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:46,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:46,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896668602] [2020-10-13 14:19:46,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:46,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:46,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:46,302 INFO L87 Difference]: Start difference. First operand 308 states and 450 transitions. Second operand 7 states. [2020-10-13 14:19:46,482 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:19:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:47,594 INFO L93 Difference]: Finished difference Result 1984 states and 3077 transitions. [2020-10-13 14:19:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:47,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-13 14:19:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:47,606 INFO L225 Difference]: With dead ends: 1984 [2020-10-13 14:19:47,606 INFO L226 Difference]: Without dead ends: 1726 [2020-10-13 14:19:47,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-10-13 14:19:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 774. [2020-10-13 14:19:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-10-13 14:19:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1173 transitions. [2020-10-13 14:19:47,676 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1173 transitions. Word has length 81 [2020-10-13 14:19:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:47,677 INFO L479 AbstractCegarLoop]: Abstraction has 774 states and 1173 transitions. [2020-10-13 14:19:47,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1173 transitions. [2020-10-13 14:19:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:19:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:47,682 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 14:19:47,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:19:47,682 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1322514415, now seen corresponding path program 1 times [2020-10-13 14:19:47,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:47,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344132751] [2020-10-13 14:19:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:47,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:48,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:52,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:19:52,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:19:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:19:52,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:19:52,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:19:52,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:19:52,903 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:19:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:52,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:52,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:52,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:19:52,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:52,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:19:52,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344132751] [2020-10-13 14:19:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:52,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982056449] [2020-10-13 14:19:52,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:52,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:52,997 INFO L87 Difference]: Start difference. First operand 774 states and 1173 transitions. Second operand 7 states. [2020-10-13 14:19:53,224 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:19:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:19:54,449 INFO L93 Difference]: Finished difference Result 4394 states and 6857 transitions. [2020-10-13 14:19:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:19:54,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-13 14:19:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:19:54,470 INFO L225 Difference]: With dead ends: 4394 [2020-10-13 14:19:54,471 INFO L226 Difference]: Without dead ends: 3932 [2020-10-13 14:19:54,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:19:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2020-10-13 14:19:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 1445. [2020-10-13 14:19:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1445 states. [2020-10-13 14:19:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2209 transitions. [2020-10-13 14:19:54,579 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2209 transitions. Word has length 82 [2020-10-13 14:19:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:19:54,580 INFO L479 AbstractCegarLoop]: Abstraction has 1445 states and 2209 transitions. [2020-10-13 14:19:54,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:19:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2209 transitions. [2020-10-13 14:19:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:19:54,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:19:54,584 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 14:19:54,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:19:54,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:19:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:19:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash 255003168, now seen corresponding path program 1 times [2020-10-13 14:19:54,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:19:54,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530363500] [2020-10-13 14:19:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:19:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:54,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:54,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:54,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:55,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:59,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:59,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:59,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:19:59,837 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:19:59,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:19:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:19:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:19:59,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:19:59,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:19:59,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:19:59,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:19:59,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:19:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:19:59,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:19:59,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:19:59,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:19:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:19:59,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530363500] [2020-10-13 14:19:59,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:19:59,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:19:59,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909032809] [2020-10-13 14:19:59,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:19:59,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:19:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:19:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:19:59,887 INFO L87 Difference]: Start difference. First operand 1445 states and 2209 transitions. Second operand 7 states. [2020-10-13 14:20:00,126 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:01,411 INFO L93 Difference]: Finished difference Result 6897 states and 10757 transitions. [2020-10-13 14:20:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:01,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-13 14:20:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:01,443 INFO L225 Difference]: With dead ends: 6897 [2020-10-13 14:20:01,443 INFO L226 Difference]: Without dead ends: 6153 [2020-10-13 14:20:01,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:20:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2020-10-13 14:20:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 1897. [2020-10-13 14:20:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-10-13 14:20:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2894 transitions. [2020-10-13 14:20:01,639 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2894 transitions. Word has length 82 [2020-10-13 14:20:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 1897 states and 2894 transitions. [2020-10-13 14:20:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:20:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2894 transitions. [2020-10-13 14:20:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:20:01,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:01,644 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:01,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:20:01,644 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1745466895, now seen corresponding path program 1 times [2020-10-13 14:20:01,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:01,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980015219] [2020-10-13 14:20:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:01,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:01,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:01,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:03,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:06,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 14:20:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:20:06,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:06,851 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:06,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:06,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:06,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:06,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:20:06,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:06,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980015219] [2020-10-13 14:20:06,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:06,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:20:06,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631436589] [2020-10-13 14:20:06,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:20:06,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:06,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:20:06,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:20:06,897 INFO L87 Difference]: Start difference. First operand 1897 states and 2894 transitions. Second operand 7 states. [2020-10-13 14:20:07,053 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:08,269 INFO L93 Difference]: Finished difference Result 6087 states and 9416 transitions. [2020-10-13 14:20:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:08,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-13 14:20:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:08,294 INFO L225 Difference]: With dead ends: 6087 [2020-10-13 14:20:08,294 INFO L226 Difference]: Without dead ends: 5113 [2020-10-13 14:20:08,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:20:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5113 states. [2020-10-13 14:20:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5113 to 1871. [2020-10-13 14:20:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-10-13 14:20:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2855 transitions. [2020-10-13 14:20:08,448 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2855 transitions. Word has length 82 [2020-10-13 14:20:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:08,448 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2855 transitions. [2020-10-13 14:20:08,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:20:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2855 transitions. [2020-10-13 14:20:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:20:08,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:08,451 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:08,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:20:08,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash 783175329, now seen corresponding path program 1 times [2020-10-13 14:20:08,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:08,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655729662] [2020-10-13 14:20:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:13,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:13,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:20:13,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:13,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:13,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:13,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:13,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:13,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:13,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:20:13,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:13,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:13,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655729662] [2020-10-13 14:20:13,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:13,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:20:13,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203772176] [2020-10-13 14:20:13,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:20:13,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:20:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:20:13,668 INFO L87 Difference]: Start difference. First operand 1871 states and 2855 transitions. Second operand 7 states. [2020-10-13 14:20:13,839 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:14,956 INFO L93 Difference]: Finished difference Result 6338 states and 9815 transitions. [2020-10-13 14:20:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:14,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-13 14:20:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:14,984 INFO L225 Difference]: With dead ends: 6338 [2020-10-13 14:20:14,984 INFO L226 Difference]: Without dead ends: 4889 [2020-10-13 14:20:14,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:20:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4889 states. [2020-10-13 14:20:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4889 to 1831. [2020-10-13 14:20:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1831 states. [2020-10-13 14:20:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2796 transitions. [2020-10-13 14:20:15,141 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2796 transitions. Word has length 83 [2020-10-13 14:20:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:15,142 INFO L479 AbstractCegarLoop]: Abstraction has 1831 states and 2796 transitions. [2020-10-13 14:20:15,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:20:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2796 transitions. [2020-10-13 14:20:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:20:15,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:15,145 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:15,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:20:15,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1217294734, now seen corresponding path program 1 times [2020-10-13 14:20:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:15,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570208068] [2020-10-13 14:20:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:15,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:16,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:16,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:16,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:16,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:20:20,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:20:20,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:20:20,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:20,337 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:20,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:20,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:20,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:20:20,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:20,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570208068] [2020-10-13 14:20:20,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:20,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:20:20,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009027101] [2020-10-13 14:20:20,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:20:20,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:20:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:20:20,367 INFO L87 Difference]: Start difference. First operand 1831 states and 2796 transitions. Second operand 7 states. [2020-10-13 14:20:20,547 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:21,695 INFO L93 Difference]: Finished difference Result 6253 states and 9684 transitions. [2020-10-13 14:20:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:21,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-13 14:20:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:21,715 INFO L225 Difference]: With dead ends: 6253 [2020-10-13 14:20:21,716 INFO L226 Difference]: Without dead ends: 4788 [2020-10-13 14:20:21,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:20:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2020-10-13 14:20:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 1775. [2020-10-13 14:20:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1775 states. [2020-10-13 14:20:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2709 transitions. [2020-10-13 14:20:21,870 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2709 transitions. Word has length 83 [2020-10-13 14:20:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:21,870 INFO L479 AbstractCegarLoop]: Abstraction has 1775 states and 2709 transitions. [2020-10-13 14:20:21,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:20:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2709 transitions. [2020-10-13 14:20:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:20:21,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:21,873 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:21,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:20:21,873 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1723888447, now seen corresponding path program 1 times [2020-10-13 14:20:21,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:21,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662937987] [2020-10-13 14:20:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:21,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:22,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:22,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:23,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:24,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:26,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:26,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:20:26,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:20:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:20:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:20:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:20:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:20:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:27,055 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:27,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:27,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:27,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:20:27,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:27,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662937987] [2020-10-13 14:20:27,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:27,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:20:27,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829555621] [2020-10-13 14:20:27,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:20:27,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:20:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:20:27,079 INFO L87 Difference]: Start difference. First operand 1775 states and 2709 transitions. Second operand 7 states. [2020-10-13 14:20:27,253 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:20:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:28,569 INFO L93 Difference]: Finished difference Result 7313 states and 11352 transitions. [2020-10-13 14:20:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:20:28,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-13 14:20:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:28,586 INFO L225 Difference]: With dead ends: 7313 [2020-10-13 14:20:28,586 INFO L226 Difference]: Without dead ends: 6327 [2020-10-13 14:20:28,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:20:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2020-10-13 14:20:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 2284. [2020-10-13 14:20:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2020-10-13 14:20:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3501 transitions. [2020-10-13 14:20:28,811 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3501 transitions. Word has length 83 [2020-10-13 14:20:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:28,811 INFO L479 AbstractCegarLoop]: Abstraction has 2284 states and 3501 transitions. [2020-10-13 14:20:28,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:20:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3501 transitions. [2020-10-13 14:20:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:20:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:28,815 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:28,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:20:28,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1226052462, now seen corresponding path program 1 times [2020-10-13 14:20:28,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:28,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029797013] [2020-10-13 14:20:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:28,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:28,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:28,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:29,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:29,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:30,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:32,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:33,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:20:33,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:34,045 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:34,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:34,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:34,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:34,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:34,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029797013] [2020-10-13 14:20:34,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:34,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:34,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119372469] [2020-10-13 14:20:34,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:34,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:34,095 INFO L87 Difference]: Start difference. First operand 2284 states and 3501 transitions. Second operand 6 states. [2020-10-13 14:20:34,261 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:20:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:35,106 INFO L93 Difference]: Finished difference Result 4544 states and 7000 transitions. [2020-10-13 14:20:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:20:35,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-13 14:20:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:35,114 INFO L225 Difference]: With dead ends: 4544 [2020-10-13 14:20:35,114 INFO L226 Difference]: Without dead ends: 3376 [2020-10-13 14:20:35,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:20:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2020-10-13 14:20:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2389. [2020-10-13 14:20:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-10-13 14:20:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3645 transitions. [2020-10-13 14:20:35,408 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3645 transitions. Word has length 83 [2020-10-13 14:20:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:35,408 INFO L479 AbstractCegarLoop]: Abstraction has 2389 states and 3645 transitions. [2020-10-13 14:20:35,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:20:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3645 transitions. [2020-10-13 14:20:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:20:35,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:35,411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:35,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:20:35,411 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:35,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1764546656, now seen corresponding path program 1 times [2020-10-13 14:20:35,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:35,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177911651] [2020-10-13 14:20:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:35,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:36,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:36,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:36,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:36,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:38,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:38,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:40,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 14:20:40,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:40,623 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:40,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:40,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:40,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177911651] [2020-10-13 14:20:40,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:40,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:40,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499676521] [2020-10-13 14:20:40,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:40,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:40,656 INFO L87 Difference]: Start difference. First operand 2389 states and 3645 transitions. Second operand 6 states. [2020-10-13 14:20:40,828 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:20:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:41,595 INFO L93 Difference]: Finished difference Result 4287 states and 6575 transitions. [2020-10-13 14:20:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:20:41,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-13 14:20:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:41,601 INFO L225 Difference]: With dead ends: 4287 [2020-10-13 14:20:41,602 INFO L226 Difference]: Without dead ends: 2358 [2020-10-13 14:20:41,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:20:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2020-10-13 14:20:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2356. [2020-10-13 14:20:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2356 states. [2020-10-13 14:20:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3602 transitions. [2020-10-13 14:20:41,908 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3602 transitions. Word has length 84 [2020-10-13 14:20:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:41,908 INFO L479 AbstractCegarLoop]: Abstraction has 2356 states and 3602 transitions. [2020-10-13 14:20:41,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:20:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3602 transitions. [2020-10-13 14:20:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:20:41,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:41,911 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:41,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:20:41,912 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash -872015823, now seen corresponding path program 1 times [2020-10-13 14:20:41,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:41,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37671662] [2020-10-13 14:20:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:41,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:43,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:43,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:43,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:43,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:46,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:46,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:46,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:20:46,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:47,096 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:47,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:47,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:47,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:47,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:47,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37671662] [2020-10-13 14:20:47,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:47,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:47,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063583547] [2020-10-13 14:20:47,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:47,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:47,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:47,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:47,129 INFO L87 Difference]: Start difference. First operand 2356 states and 3602 transitions. Second operand 6 states. [2020-10-13 14:20:47,294 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 14:20:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:47,988 INFO L93 Difference]: Finished difference Result 4210 states and 6483 transitions. [2020-10-13 14:20:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:20:47,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-13 14:20:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:47,993 INFO L225 Difference]: With dead ends: 4210 [2020-10-13 14:20:47,994 INFO L226 Difference]: Without dead ends: 2275 [2020-10-13 14:20:47,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:20:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2020-10-13 14:20:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1255. [2020-10-13 14:20:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1255 states. [2020-10-13 14:20:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1899 transitions. [2020-10-13 14:20:48,200 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1899 transitions. Word has length 84 [2020-10-13 14:20:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:48,201 INFO L479 AbstractCegarLoop]: Abstraction has 1255 states and 1899 transitions. [2020-10-13 14:20:48,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:20:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1899 transitions. [2020-10-13 14:20:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:20:48,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:48,203 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:48,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:20:48,203 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -374179838, now seen corresponding path program 1 times [2020-10-13 14:20:48,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:48,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366097154] [2020-10-13 14:20:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:49,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:49,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:49,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:51,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:51,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:52,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:53,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:20:53,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:53,401 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:53,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:53,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:53,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:53,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:53,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:53,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366097154] [2020-10-13 14:20:53,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:53,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:53,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733103714] [2020-10-13 14:20:53,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:53,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:53,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:53,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:53,432 INFO L87 Difference]: Start difference. First operand 1255 states and 1899 transitions. Second operand 6 states. [2020-10-13 14:20:53,603 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:20:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:20:54,300 INFO L93 Difference]: Finished difference Result 2199 states and 3349 transitions. [2020-10-13 14:20:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:20:54,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-13 14:20:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:20:54,303 INFO L225 Difference]: With dead ends: 2199 [2020-10-13 14:20:54,303 INFO L226 Difference]: Without dead ends: 1192 [2020-10-13 14:20:54,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:20:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-10-13 14:20:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1190. [2020-10-13 14:20:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-10-13 14:20:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1800 transitions. [2020-10-13 14:20:54,484 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1800 transitions. Word has length 84 [2020-10-13 14:20:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:20:54,484 INFO L479 AbstractCegarLoop]: Abstraction has 1190 states and 1800 transitions. [2020-10-13 14:20:54,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:20:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1800 transitions. [2020-10-13 14:20:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:20:54,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:20:54,486 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:20:54,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:20:54,487 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:20:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:20:54,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1920317395, now seen corresponding path program 1 times [2020-10-13 14:20:54,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:20:54,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936740555] [2020-10-13 14:20:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:20:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:55,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:55,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:55,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:55,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:56,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:57,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:59,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:59,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:20:59,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:20:59,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:20:59,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:20:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:20:59,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:20:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:59,675 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:20:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:20:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:20:59,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:20:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:20:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:20:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:20:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:20:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:20:59,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936740555] [2020-10-13 14:20:59,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:20:59,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:20:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203678195] [2020-10-13 14:20:59,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:20:59,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:20:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:20:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:20:59,704 INFO L87 Difference]: Start difference. First operand 1190 states and 1800 transitions. Second operand 6 states. [2020-10-13 14:20:59,869 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:21:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:00,529 INFO L93 Difference]: Finished difference Result 2114 states and 3218 transitions. [2020-10-13 14:21:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:21:00,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-13 14:21:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:00,531 INFO L225 Difference]: With dead ends: 2114 [2020-10-13 14:21:00,531 INFO L226 Difference]: Without dead ends: 1091 [2020-10-13 14:21:00,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:21:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2020-10-13 14:21:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1089. [2020-10-13 14:21:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-10-13 14:21:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1641 transitions. [2020-10-13 14:21:00,713 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1641 transitions. Word has length 84 [2020-10-13 14:21:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:00,714 INFO L479 AbstractCegarLoop]: Abstraction has 1089 states and 1641 transitions. [2020-10-13 14:21:00,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:21:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1641 transitions. [2020-10-13 14:21:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:21:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:00,716 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:00,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:21:00,718 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash 246274847, now seen corresponding path program 1 times [2020-10-13 14:21:00,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:00,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749467657] [2020-10-13 14:21:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:00,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:01,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:01,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:01,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:03,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:04,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:05,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:21:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 14:21:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:21:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:05,890 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:05,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:05,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:05,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:05,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:05,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749467657] [2020-10-13 14:21:05,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:05,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:21:05,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741246361] [2020-10-13 14:21:05,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:21:05,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:21:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:21:05,914 INFO L87 Difference]: Start difference. First operand 1089 states and 1641 transitions. Second operand 4 states. [2020-10-13 14:21:06,061 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 14:21:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:06,970 INFO L93 Difference]: Finished difference Result 3013 states and 4603 transitions. [2020-10-13 14:21:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:21:06,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-13 14:21:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:06,973 INFO L225 Difference]: With dead ends: 3013 [2020-10-13 14:21:06,973 INFO L226 Difference]: Without dead ends: 2099 [2020-10-13 14:21:06,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:21:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2020-10-13 14:21:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2097. [2020-10-13 14:21:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2097 states. [2020-10-13 14:21:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3161 transitions. [2020-10-13 14:21:07,247 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3161 transitions. Word has length 85 [2020-10-13 14:21:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:07,248 INFO L479 AbstractCegarLoop]: Abstraction has 2097 states and 3161 transitions. [2020-10-13 14:21:07,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:21:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3161 transitions. [2020-10-13 14:21:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:21:07,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:07,250 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:07,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:21:07,250 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1483687590, now seen corresponding path program 1 times [2020-10-13 14:21:07,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:07,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196960582] [2020-10-13 14:21:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:07,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:07,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:07,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:08,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:09,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:09,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:09,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:10,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:10,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:21:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:21:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:21:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:12,575 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:12,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:12,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:12,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:12,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:12,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:21:12,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:12,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:12,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:12,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196960582] [2020-10-13 14:21:12,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:12,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:21:12,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126985087] [2020-10-13 14:21:12,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:21:12,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:12,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:21:12,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:21:12,602 INFO L87 Difference]: Start difference. First operand 2097 states and 3161 transitions. Second operand 11 states. [2020-10-13 14:21:13,048 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 153 [2020-10-13 14:21:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:16,012 INFO L93 Difference]: Finished difference Result 11207 states and 16833 transitions. [2020-10-13 14:21:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:21:16,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-13 14:21:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:16,022 INFO L225 Difference]: With dead ends: 11207 [2020-10-13 14:21:16,022 INFO L226 Difference]: Without dead ends: 9357 [2020-10-13 14:21:16,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:21:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2020-10-13 14:21:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 2097. [2020-10-13 14:21:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2097 states. [2020-10-13 14:21:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3160 transitions. [2020-10-13 14:21:16,443 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3160 transitions. Word has length 87 [2020-10-13 14:21:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:16,443 INFO L479 AbstractCegarLoop]: Abstraction has 2097 states and 3160 transitions. [2020-10-13 14:21:16,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:21:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3160 transitions. [2020-10-13 14:21:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:21:16,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:16,445 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:16,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:21:16,446 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1884842097, now seen corresponding path program 1 times [2020-10-13 14:21:16,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:16,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773699088] [2020-10-13 14:21:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:16,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:18,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:19,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:21,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:21:21,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:21,795 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:21,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:21,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:21,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:21,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773699088] [2020-10-13 14:21:21,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:21,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:21:21,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814931023] [2020-10-13 14:21:21,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:21:21,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:21:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:21:21,823 INFO L87 Difference]: Start difference. First operand 2097 states and 3160 transitions. Second operand 8 states. [2020-10-13 14:21:22,023 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 14:21:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:23,510 INFO L93 Difference]: Finished difference Result 4941 states and 7490 transitions. [2020-10-13 14:21:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:21:23,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-13 14:21:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:23,515 INFO L225 Difference]: With dead ends: 4941 [2020-10-13 14:21:23,515 INFO L226 Difference]: Without dead ends: 3019 [2020-10-13 14:21:23,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:21:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-10-13 14:21:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2097. [2020-10-13 14:21:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2097 states. [2020-10-13 14:21:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3159 transitions. [2020-10-13 14:21:23,876 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3159 transitions. Word has length 87 [2020-10-13 14:21:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:23,876 INFO L479 AbstractCegarLoop]: Abstraction has 2097 states and 3159 transitions. [2020-10-13 14:21:23,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:21:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3159 transitions. [2020-10-13 14:21:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:21:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:23,878 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:23,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:21:23,878 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 284218314, now seen corresponding path program 1 times [2020-10-13 14:21:23,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:23,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283661346] [2020-10-13 14:21:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:28,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:28,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:21:28,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:21:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:21:28,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:21:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:21:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:21:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:29,236 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:29,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:29,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:29,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:29,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:29,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283661346] [2020-10-13 14:21:29,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:29,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:21:29,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042109231] [2020-10-13 14:21:29,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:21:29,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:21:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:21:29,264 INFO L87 Difference]: Start difference. First operand 2097 states and 3159 transitions. Second operand 9 states. [2020-10-13 14:21:29,441 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-13 14:21:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:30,792 INFO L93 Difference]: Finished difference Result 4888 states and 7409 transitions. [2020-10-13 14:21:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:21:30,792 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:21:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:30,795 INFO L225 Difference]: With dead ends: 4888 [2020-10-13 14:21:30,796 INFO L226 Difference]: Without dead ends: 3009 [2020-10-13 14:21:30,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:21:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2020-10-13 14:21:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2087. [2020-10-13 14:21:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2020-10-13 14:21:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3143 transitions. [2020-10-13 14:21:31,226 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3143 transitions. Word has length 88 [2020-10-13 14:21:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:31,227 INFO L479 AbstractCegarLoop]: Abstraction has 2087 states and 3143 transitions. [2020-10-13 14:21:31,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:21:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3143 transitions. [2020-10-13 14:21:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:21:31,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:31,228 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:31,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:21:31,228 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:31,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1559933771, now seen corresponding path program 1 times [2020-10-13 14:21:31,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:31,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175424845] [2020-10-13 14:21:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:34,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:36,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:36,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:36,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:21:36,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 14:21:36,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:21:36,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:36,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:21:36,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 14:21:36,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:21:36,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:36,662 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:36,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:36,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:36,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:36,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175424845] [2020-10-13 14:21:36,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:36,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:21:36,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426151087] [2020-10-13 14:21:36,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:21:36,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:21:36,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:21:36,688 INFO L87 Difference]: Start difference. First operand 2087 states and 3143 transitions. Second operand 12 states. [2020-10-13 14:21:37,178 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2020-10-13 14:21:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:43,788 INFO L93 Difference]: Finished difference Result 18765 states and 28039 transitions. [2020-10-13 14:21:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 14:21:43,788 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-10-13 14:21:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:43,804 INFO L225 Difference]: With dead ends: 18765 [2020-10-13 14:21:43,805 INFO L226 Difference]: Without dead ends: 16901 [2020-10-13 14:21:43,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 14:21:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16901 states. [2020-10-13 14:21:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16901 to 2087. [2020-10-13 14:21:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2020-10-13 14:21:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3141 transitions. [2020-10-13 14:21:44,357 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3141 transitions. Word has length 88 [2020-10-13 14:21:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:44,357 INFO L479 AbstractCegarLoop]: Abstraction has 2087 states and 3141 transitions. [2020-10-13 14:21:44,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:21:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3141 transitions. [2020-10-13 14:21:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:21:44,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:44,359 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:44,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:21:44,359 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:44,360 INFO L82 PathProgramCache]: Analyzing trace with hash -365942559, now seen corresponding path program 1 times [2020-10-13 14:21:44,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:44,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441965641] [2020-10-13 14:21:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:44,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:44,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:45,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:49,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:21:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:49,760 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:21:49,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:21:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:49,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:21:49,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:21:49,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:21:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:21:49,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:21:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:21:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:21:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:21:49,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:21:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:21:49,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441965641] [2020-10-13 14:21:49,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:21:49,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:21:49,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112659802] [2020-10-13 14:21:49,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:21:49,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:21:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:21:49,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:21:49,790 INFO L87 Difference]: Start difference. First operand 2087 states and 3141 transitions. Second operand 12 states. [2020-10-13 14:21:50,166 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2020-10-13 14:21:50,746 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-13 14:21:52,254 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 14:21:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:21:54,587 INFO L93 Difference]: Finished difference Result 7733 states and 11705 transitions. [2020-10-13 14:21:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 14:21:54,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-10-13 14:21:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:21:54,594 INFO L225 Difference]: With dead ends: 7733 [2020-10-13 14:21:54,594 INFO L226 Difference]: Without dead ends: 5864 [2020-10-13 14:21:54,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:21:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5864 states. [2020-10-13 14:21:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5864 to 2087. [2020-10-13 14:21:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2020-10-13 14:21:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3140 transitions. [2020-10-13 14:21:55,072 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3140 transitions. Word has length 88 [2020-10-13 14:21:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:21:55,072 INFO L479 AbstractCegarLoop]: Abstraction has 2087 states and 3140 transitions. [2020-10-13 14:21:55,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:21:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3140 transitions. [2020-10-13 14:21:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:21:55,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:21:55,074 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:21:55,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:21:55,074 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:21:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:21:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 565392290, now seen corresponding path program 1 times [2020-10-13 14:21:55,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:21:55,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774292528] [2020-10-13 14:21:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:21:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:21:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:55,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:56,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:21:57,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:00,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:00,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 14:22:00,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:00,255 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:00,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:00,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:00,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:00,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774292528] [2020-10-13 14:22:00,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:00,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:22:00,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722824419] [2020-10-13 14:22:00,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:22:00,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:00,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:22:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:22:00,278 INFO L87 Difference]: Start difference. First operand 2087 states and 3140 transitions. Second operand 6 states. [2020-10-13 14:22:00,465 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-13 14:22:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:01,933 INFO L93 Difference]: Finished difference Result 5705 states and 8655 transitions. [2020-10-13 14:22:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:22:01,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-13 14:22:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:01,937 INFO L225 Difference]: With dead ends: 5705 [2020-10-13 14:22:01,937 INFO L226 Difference]: Without dead ends: 3879 [2020-10-13 14:22:01,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:22:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2020-10-13 14:22:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3875. [2020-10-13 14:22:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3875 states. [2020-10-13 14:22:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5836 transitions. [2020-10-13 14:22:02,931 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5836 transitions. Word has length 89 [2020-10-13 14:22:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:02,931 INFO L479 AbstractCegarLoop]: Abstraction has 3875 states and 5836 transitions. [2020-10-13 14:22:02,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:22:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5836 transitions. [2020-10-13 14:22:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:22:02,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:02,932 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:02,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:22:02,933 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1419215336, now seen corresponding path program 1 times [2020-10-13 14:22:02,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:02,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629009866] [2020-10-13 14:22:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:02,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:02,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:03,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:04,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:07,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:07,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:07,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:22:07,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:22:07,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:22:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 14:22:07,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:22:07,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:08,098 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:08,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:08,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:08,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:08,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:08,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629009866] [2020-10-13 14:22:08,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:08,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:22:08,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152207911] [2020-10-13 14:22:08,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:22:08,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:22:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:22:08,122 INFO L87 Difference]: Start difference. First operand 3875 states and 5836 transitions. Second operand 4 states. [2020-10-13 14:22:08,272 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 14:22:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:09,728 INFO L93 Difference]: Finished difference Result 7463 states and 11278 transitions. [2020-10-13 14:22:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:22:09,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:22:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:09,732 INFO L225 Difference]: With dead ends: 7463 [2020-10-13 14:22:09,732 INFO L226 Difference]: Without dead ends: 3877 [2020-10-13 14:22:09,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:22:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2020-10-13 14:22:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 3875. [2020-10-13 14:22:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3875 states. [2020-10-13 14:22:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5820 transitions. [2020-10-13 14:22:10,732 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5820 transitions. Word has length 89 [2020-10-13 14:22:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:10,732 INFO L479 AbstractCegarLoop]: Abstraction has 3875 states and 5820 transitions. [2020-10-13 14:22:10,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:22:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5820 transitions. [2020-10-13 14:22:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:22:10,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:10,734 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:10,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:22:10,734 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:10,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1624207207, now seen corresponding path program 1 times [2020-10-13 14:22:10,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:10,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9693719] [2020-10-13 14:22:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:10,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:11,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:12,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:15,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:15,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:15,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:15,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:22:15,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:22:15,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:15,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:22:15,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 14:22:15,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:22:15,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:15,897 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:15,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:15,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9693719] [2020-10-13 14:22:15,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:15,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:22:15,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513629106] [2020-10-13 14:22:15,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:22:15,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:22:15,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:22:15,916 INFO L87 Difference]: Start difference. First operand 3875 states and 5820 transitions. Second operand 4 states. [2020-10-13 14:22:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:18,373 INFO L93 Difference]: Finished difference Result 10663 states and 15998 transitions. [2020-10-13 14:22:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:22:18,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:22:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:18,382 INFO L225 Difference]: With dead ends: 10663 [2020-10-13 14:22:18,382 INFO L226 Difference]: Without dead ends: 7077 [2020-10-13 14:22:18,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:22:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7077 states. [2020-10-13 14:22:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7077 to 7075. [2020-10-13 14:22:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7075 states. [2020-10-13 14:22:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 10476 transitions. [2020-10-13 14:22:20,115 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 10476 transitions. Word has length 89 [2020-10-13 14:22:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:20,115 INFO L479 AbstractCegarLoop]: Abstraction has 7075 states and 10476 transitions. [2020-10-13 14:22:20,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:22:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 10476 transitions. [2020-10-13 14:22:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:22:20,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:20,116 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:20,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:22:20,117 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1894142805, now seen corresponding path program 1 times [2020-10-13 14:22:20,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:20,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526253052] [2020-10-13 14:22:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:21,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:22,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:25,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:25,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:22:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 14:22:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:22:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:22:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:22:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:22:25,371 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:25,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:25,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:25,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:25,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:25,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:22:25,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:25,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526253052] [2020-10-13 14:22:25,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:25,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:22:25,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449405644] [2020-10-13 14:22:25,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:22:25,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:22:25,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:22:25,394 INFO L87 Difference]: Start difference. First operand 7075 states and 10476 transitions. Second operand 6 states. [2020-10-13 14:22:25,576 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-13 14:22:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:29,105 INFO L93 Difference]: Finished difference Result 17857 states and 26407 transitions. [2020-10-13 14:22:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:22:29,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2020-10-13 14:22:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:29,114 INFO L225 Difference]: With dead ends: 17857 [2020-10-13 14:22:29,114 INFO L226 Difference]: Without dead ends: 11071 [2020-10-13 14:22:29,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:22:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-10-13 14:22:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10507. [2020-10-13 14:22:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10507 states. [2020-10-13 14:22:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 15572 transitions. [2020-10-13 14:22:31,676 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 15572 transitions. Word has length 89 [2020-10-13 14:22:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:31,677 INFO L479 AbstractCegarLoop]: Abstraction has 10507 states and 15572 transitions. [2020-10-13 14:22:31,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:22:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 15572 transitions. [2020-10-13 14:22:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:22:31,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:31,678 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:31,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:22:31,679 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:31,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1677531455, now seen corresponding path program 1 times [2020-10-13 14:22:31,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:31,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74688758] [2020-10-13 14:22:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:31,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 14:22:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:36,980 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:36,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:36,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:36,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:36,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:22:36,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:36,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:36,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:37,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74688758] [2020-10-13 14:22:37,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:37,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:22:37,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747564332] [2020-10-13 14:22:37,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:22:37,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:22:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:22:37,005 INFO L87 Difference]: Start difference. First operand 10507 states and 15572 transitions. Second operand 9 states. [2020-10-13 14:22:37,186 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:22:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:22:42,916 INFO L93 Difference]: Finished difference Result 26115 states and 38642 transitions. [2020-10-13 14:22:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 14:22:42,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:22:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:22:42,932 INFO L225 Difference]: With dead ends: 26115 [2020-10-13 14:22:42,932 INFO L226 Difference]: Without dead ends: 15853 [2020-10-13 14:22:42,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-13 14:22:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15853 states. [2020-10-13 14:22:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15853 to 10507. [2020-10-13 14:22:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10507 states. [2020-10-13 14:22:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 15571 transitions. [2020-10-13 14:22:45,723 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 15571 transitions. Word has length 89 [2020-10-13 14:22:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:22:45,723 INFO L479 AbstractCegarLoop]: Abstraction has 10507 states and 15571 transitions. [2020-10-13 14:22:45,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:22:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 15571 transitions. [2020-10-13 14:22:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:22:45,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:22:45,725 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:22:45,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:22:45,725 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:22:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:22:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1879934481, now seen corresponding path program 1 times [2020-10-13 14:22:45,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:22:45,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299664498] [2020-10-13 14:22:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:22:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:49,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:22:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:22:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:22:50,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:51,155 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:22:51,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:22:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:22:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:22:51,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:22:51,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:22:51,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:22:51,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:22:51,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:22:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:22:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:22:51,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:22:51,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:22:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:22:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299664498] [2020-10-13 14:22:51,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:22:51,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 14:22:51,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884336483] [2020-10-13 14:22:51,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:22:51,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:22:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:22:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:22:51,181 INFO L87 Difference]: Start difference. First operand 10507 states and 15571 transitions. Second operand 13 states. [2020-10-13 14:22:51,625 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 153 [2020-10-13 14:23:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:23:12,374 INFO L93 Difference]: Finished difference Result 72731 states and 107341 transitions. [2020-10-13 14:23:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 14:23:12,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-10-13 14:23:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:23:12,442 INFO L225 Difference]: With dead ends: 72731 [2020-10-13 14:23:12,442 INFO L226 Difference]: Without dead ends: 62461 [2020-10-13 14:23:12,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:23:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2020-10-13 14:23:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 10525. [2020-10-13 14:23:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10525 states. [2020-10-13 14:23:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10525 states to 10525 states and 15587 transitions. [2020-10-13 14:23:16,670 INFO L78 Accepts]: Start accepts. Automaton has 10525 states and 15587 transitions. Word has length 89 [2020-10-13 14:23:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:23:16,671 INFO L479 AbstractCegarLoop]: Abstraction has 10525 states and 15587 transitions. [2020-10-13 14:23:16,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 14:23:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10525 states and 15587 transitions. [2020-10-13 14:23:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 14:23:16,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:23:16,672 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:23:16,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:23:16,672 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:23:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:23:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1051060459, now seen corresponding path program 1 times [2020-10-13 14:23:16,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:23:16,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496007393] [2020-10-13 14:23:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:23:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:19,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:23:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:23:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:22,119 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:23:22,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:23:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:23:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:23:22,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:23:22,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:23:22,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:23:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:23:22,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:23:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:23:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:23:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:23:22,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:23:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:23:22,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496007393] [2020-10-13 14:23:22,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:23:22,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-13 14:23:22,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072447614] [2020-10-13 14:23:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 14:23:22,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:23:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 14:23:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:23:22,151 INFO L87 Difference]: Start difference. First operand 10525 states and 15587 transitions. Second operand 13 states. [2020-10-13 14:23:22,391 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 155