/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-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:49:43,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:49:43,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:49:43,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:49:43,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:49:43,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:49:43,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:49:43,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:49:43,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:49:43,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:49:43,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:49:43,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:49:43,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:49:43,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:49:43,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:49:43,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:49:43,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:49:43,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:49:43,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:49:43,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:49:43,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:49:43,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:49:43,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:49:43,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:49:43,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:49:43,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:49:43,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:49:43,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:49:43,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:49:43,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:49:43,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:49:43,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:49:43,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:49:43,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:49:43,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:49:43,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:49:43,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:49:43,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:49:43,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:49:43,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:49:43,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:49:43,417 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 14:49:43,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:49:43,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:49:43,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:49:43,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:49:43,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:49:43,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:49:43,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:49:43,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:49:43,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:49:43,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:49:43,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:49:43,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:49:43,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:49:43,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:49:43,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:49:43,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:49:43,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:49:43,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:49:43,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:49:43,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:49:43,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:49:43,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:49:43,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:49:43,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:49:43,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:49:43,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:49:43,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:49:43,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:49:43,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:49:43,466 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 14:49:43,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:49:43,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:49:43,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:49:43,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:49:43,805 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:49:43,806 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:49:43,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c08d350f4/ad0b209d449f46afb391d69d7eb78913/FLAG9e467643e [2020-10-13 14:49:44,388 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:49:44,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:49:44,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c08d350f4/ad0b209d449f46afb391d69d7eb78913/FLAG9e467643e [2020-10-13 14:49:44,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c08d350f4/ad0b209d449f46afb391d69d7eb78913 [2020-10-13 14:49:44,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:49:44,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:49:44,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:49:44,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:49:44,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:49:44,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:49:44" (1/1) ... [2020-10-13 14:49:44,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:44, skipping insertion in model container [2020-10-13 14:49:44,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:49:44" (1/1) ... [2020-10-13 14:49:44,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:49:44,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:49:45,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:49:45,130 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:49:45,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:49:45,397 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:49:45,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45 WrapperNode [2020-10-13 14:49:45,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:49:45,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:49:45,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:49:45,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:49:45,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (1/1) ... [2020-10-13 14:49:45,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:49:45,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:49:45,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:49:45,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:49:45,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (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 14:49:45,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:49:45,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:49:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:49:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:49:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:49:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:49:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:49:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:49:45,547 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:49:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:49:45,548 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:49:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:49:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:49:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:49:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:49:45,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:49:46,617 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:49:46,617 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:49:46,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:49:46 BoogieIcfgContainer [2020-10-13 14:49:46,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:49:46,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:49:46,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:49:46,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:49:46,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:49:44" (1/3) ... [2020-10-13 14:49:46,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436bd8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:49:46, skipping insertion in model container [2020-10-13 14:49:46,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:45" (2/3) ... [2020-10-13 14:49:46,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436bd8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:49:46, skipping insertion in model container [2020-10-13 14:49:46,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:49:46" (3/3) ... [2020-10-13 14:49:46,631 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 14:49:46,642 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:49:46,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:49:46,664 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:49:46,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:49:46,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:49:46,690 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:49:46,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:49:46,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:49:46,691 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:49:46,691 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:49:46,691 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:49:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states. [2020-10-13 14:49:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:49:46,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:46,724 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 14:49:46,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1363226384, now seen corresponding path program 1 times [2020-10-13 14:49:46,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:46,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580525797] [2020-10-13 14:49:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:47,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:50,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:50,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:49:50,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:50,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2966 [2020-10-13 14:49:50,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:49:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:49:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:49:50,379 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:50,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:50,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:50,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:50,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:50,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:49:50,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:50,449 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 14:49:50,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580525797] [2020-10-13 14:49:50,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:50,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:50,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108818521] [2020-10-13 14:49:50,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:50,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:50,479 INFO L87 Difference]: Start difference. First operand 221 states. Second operand 4 states. [2020-10-13 14:49:50,738 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:49:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:51,822 INFO L93 Difference]: Finished difference Result 444 states and 727 transitions. [2020-10-13 14:49:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:51,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-13 14:49:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:51,843 INFO L225 Difference]: With dead ends: 444 [2020-10-13 14:49:51,843 INFO L226 Difference]: Without dead ends: 333 [2020-10-13 14:49:51,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-13 14:49:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2020-10-13 14:49:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-13 14:49:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 493 transitions. [2020-10-13 14:49:51,942 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 493 transitions. Word has length 85 [2020-10-13 14:49:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:51,943 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 493 transitions. [2020-10-13 14:49:51,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 493 transitions. [2020-10-13 14:49:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:49:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:51,955 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] [2020-10-13 14:49:51,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:49:51,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 412536554, now seen corresponding path program 1 times [2020-10-13 14:49:51,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:51,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053822725] [2020-10-13 14:49:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:52,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:53,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:53,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:49:53,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:53,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-13 14:49:53,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:49:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 14:49:53,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:49:53,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:53,483 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:53,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:53,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:53,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:53,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:53,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:49:53,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:53,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:53,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:53,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:53,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:53,516 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 14:49:53,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053822725] [2020-10-13 14:49:53,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:53,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:53,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879075612] [2020-10-13 14:49:53,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:49:53,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:49:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:53,520 INFO L87 Difference]: Start difference. First operand 331 states and 493 transitions. Second operand 5 states. [2020-10-13 14:49:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:54,498 INFO L93 Difference]: Finished difference Result 509 states and 773 transitions. [2020-10-13 14:49:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:49:54,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-13 14:49:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:54,504 INFO L225 Difference]: With dead ends: 509 [2020-10-13 14:49:54,504 INFO L226 Difference]: Without dead ends: 507 [2020-10-13 14:49:54,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:49:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-13 14:49:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 333. [2020-10-13 14:49:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-13 14:49:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 495 transitions. [2020-10-13 14:49:54,532 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 495 transitions. Word has length 86 [2020-10-13 14:49:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:54,532 INFO L479 AbstractCegarLoop]: Abstraction has 333 states and 495 transitions. [2020-10-13 14:49:54,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:49:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 495 transitions. [2020-10-13 14:49:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:49:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:54,534 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 14:49:54,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:49:54,534 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash 180278519, now seen corresponding path program 1 times [2020-10-13 14:49:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:54,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746027699] [2020-10-13 14:49:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:55,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:55,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:49:55,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-13 14:49:55,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:55,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:49:55,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:49:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:49:55,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:55,773 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:55,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:55,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:55,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:55,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:55,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:49:55,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:55,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:55,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:55,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:55,845 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 14:49:55,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746027699] [2020-10-13 14:49:55,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:55,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:49:55,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669668903] [2020-10-13 14:49:55,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:49:55,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:55,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:49:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:55,847 INFO L87 Difference]: Start difference. First operand 333 states and 495 transitions. Second operand 8 states. [2020-10-13 14:49:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:58,192 INFO L93 Difference]: Finished difference Result 1429 states and 2197 transitions. [2020-10-13 14:49:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:49:58,193 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2020-10-13 14:49:58,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:58,199 INFO L225 Difference]: With dead ends: 1429 [2020-10-13 14:49:58,199 INFO L226 Difference]: Without dead ends: 1181 [2020-10-13 14:49:58,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2020-10-13 14:49:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1173. [2020-10-13 14:49:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1173 states. [2020-10-13 14:49:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1796 transitions. [2020-10-13 14:49:58,270 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1796 transitions. Word has length 87 [2020-10-13 14:49:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:58,271 INFO L479 AbstractCegarLoop]: Abstraction has 1173 states and 1796 transitions. [2020-10-13 14:49:58,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:49:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1796 transitions. [2020-10-13 14:49:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:49:58,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:58,274 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 14:49:58,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:49:58,275 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 618937369, now seen corresponding path program 1 times [2020-10-13 14:49:58,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:58,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080177517] [2020-10-13 14:49:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:58,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:58,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:49:58,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-13 14:49:58,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:49:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:49:58,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:49:58,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:49:59,083 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:49:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:59,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:59,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:59,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 14:49:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:49:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:59,169 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 14:49:59,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080177517] [2020-10-13 14:49:59,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:59,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:59,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610395107] [2020-10-13 14:49:59,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:49:59,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:49:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:49:59,190 INFO L87 Difference]: Start difference. First operand 1173 states and 1796 transitions. Second operand 6 states. [2020-10-13 14:49:59,453 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:50:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:00,746 INFO L93 Difference]: Finished difference Result 3081 states and 4774 transitions. [2020-10-13 14:50:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:00,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:50:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:00,760 INFO L225 Difference]: With dead ends: 3081 [2020-10-13 14:50:00,760 INFO L226 Difference]: Without dead ends: 1955 [2020-10-13 14:50:00,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-13 14:50:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1953. [2020-10-13 14:50:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2020-10-13 14:50:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3008 transitions. [2020-10-13 14:50:00,922 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3008 transitions. Word has length 88 [2020-10-13 14:50:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:00,925 INFO L479 AbstractCegarLoop]: Abstraction has 1953 states and 3008 transitions. [2020-10-13 14:50:00,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3008 transitions. [2020-10-13 14:50:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:50:00,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:00,934 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 14:50:00,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:50:00,935 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash -949366714, now seen corresponding path program 1 times [2020-10-13 14:50:00,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:00,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582796578] [2020-10-13 14:50:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:01,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:01,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:01,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:50:01,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-13 14:50:01,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:50:01,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:01,806 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:01,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:01,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:01,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:01,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:01,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:50:01,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:01,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:01,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:01,857 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 14:50:01,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582796578] [2020-10-13 14:50:01,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:01,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:01,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048946727] [2020-10-13 14:50:01,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:01,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:01,859 INFO L87 Difference]: Start difference. First operand 1953 states and 3008 transitions. Second operand 6 states. [2020-10-13 14:50:02,063 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:50:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:03,180 INFO L93 Difference]: Finished difference Result 5252 states and 8134 transitions. [2020-10-13 14:50:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:03,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:50:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:03,201 INFO L225 Difference]: With dead ends: 5252 [2020-10-13 14:50:03,202 INFO L226 Difference]: Without dead ends: 3415 [2020-10-13 14:50:03,205 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 14:50:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2020-10-13 14:50:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3413. [2020-10-13 14:50:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3413 states. [2020-10-13 14:50:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 5246 transitions. [2020-10-13 14:50:03,460 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 5246 transitions. Word has length 88 [2020-10-13 14:50:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:03,461 INFO L479 AbstractCegarLoop]: Abstraction has 3413 states and 5246 transitions. [2020-10-13 14:50:03,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 5246 transitions. [2020-10-13 14:50:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:50:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:03,465 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 14:50:03,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:50:03,465 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1069525931, now seen corresponding path program 1 times [2020-10-13 14:50:03,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:03,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689786689] [2020-10-13 14:50:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:03,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:03,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:03,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:50:03,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:03,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-13 14:50:03,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:03,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:03,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:03,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:50:03,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:04,290 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:04,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:04,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:04,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:04,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:04,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:04,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:50:04,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:04,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:04,359 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 14:50:04,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689786689] [2020-10-13 14:50:04,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:04,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:04,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039458566] [2020-10-13 14:50:04,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:04,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:04,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:04,367 INFO L87 Difference]: Start difference. First operand 3413 states and 5246 transitions. Second operand 6 states. [2020-10-13 14:50:04,573 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:50:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:05,942 INFO L93 Difference]: Finished difference Result 9548 states and 14747 transitions. [2020-10-13 14:50:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:05,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:50:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:05,972 INFO L225 Difference]: With dead ends: 9548 [2020-10-13 14:50:05,973 INFO L226 Difference]: Without dead ends: 6285 [2020-10-13 14:50:05,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:50:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2020-10-13 14:50:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6283. [2020-10-13 14:50:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6283 states. [2020-10-13 14:50:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 9649 transitions. [2020-10-13 14:50:06,483 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 9649 transitions. Word has length 88 [2020-10-13 14:50:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:06,483 INFO L479 AbstractCegarLoop]: Abstraction has 6283 states and 9649 transitions. [2020-10-13 14:50:06,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 9649 transitions. [2020-10-13 14:50:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:50:06,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:06,488 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 14:50:06,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:50:06,488 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1132257225, now seen corresponding path program 1 times [2020-10-13 14:50:06,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:06,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061566267] [2020-10-13 14:50:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:07,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:07,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:50:07,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:07,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-13 14:50:07,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:07,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:07,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:50:07,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:07,251 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:07,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:07,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:07,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:07,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:50:07,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:07,307 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 14:50:07,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061566267] [2020-10-13 14:50:07,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:07,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:07,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394996196] [2020-10-13 14:50:07,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:07,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:07,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:07,310 INFO L87 Difference]: Start difference. First operand 6283 states and 9649 transitions. Second operand 6 states. [2020-10-13 14:50:07,562 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:50:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:09,359 INFO L93 Difference]: Finished difference Result 18278 states and 28086 transitions. [2020-10-13 14:50:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:09,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:50:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:09,470 INFO L225 Difference]: With dead ends: 18278 [2020-10-13 14:50:09,470 INFO L226 Difference]: Without dead ends: 12081 [2020-10-13 14:50:09,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:50:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2020-10-13 14:50:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 12079. [2020-10-13 14:50:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12079 states. [2020-10-13 14:50:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12079 states to 12079 states and 18433 transitions. [2020-10-13 14:50:10,504 INFO L78 Accepts]: Start accepts. Automaton has 12079 states and 18433 transitions. Word has length 88 [2020-10-13 14:50:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:10,504 INFO L479 AbstractCegarLoop]: Abstraction has 12079 states and 18433 transitions. [2020-10-13 14:50:10,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12079 states and 18433 transitions. [2020-10-13 14:50:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:50:10,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:10,511 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 14:50:10,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:50:10,512 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash -959183832, now seen corresponding path program 1 times [2020-10-13 14:50:10,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:10,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489320495] [2020-10-13 14:50:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:10,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:10,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-13 14:50:10,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:10,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:50:10,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:11,142 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:11,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:11,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:11,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:11,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:11,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:11,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:50:11,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:11,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:11,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:11,189 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 14:50:11,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489320495] [2020-10-13 14:50:11,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:11,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:11,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621124353] [2020-10-13 14:50:11,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:11,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:11,196 INFO L87 Difference]: Start difference. First operand 12079 states and 18433 transitions. Second operand 6 states. [2020-10-13 14:50:11,666 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-13 14:50:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:14,040 INFO L93 Difference]: Finished difference Result 35595 states and 54277 transitions. [2020-10-13 14:50:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:14,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2020-10-13 14:50:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:14,106 INFO L225 Difference]: With dead ends: 35595 [2020-10-13 14:50:14,106 INFO L226 Difference]: Without dead ends: 23579 [2020-10-13 14:50:14,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:50:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23579 states. [2020-10-13 14:50:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23579 to 23577. [2020-10-13 14:50:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23577 states. [2020-10-13 14:50:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23577 states to 23577 states and 35672 transitions. [2020-10-13 14:50:16,117 INFO L78 Accepts]: Start accepts. Automaton has 23577 states and 35672 transitions. Word has length 88 [2020-10-13 14:50:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:16,117 INFO L479 AbstractCegarLoop]: Abstraction has 23577 states and 35672 transitions. [2020-10-13 14:50:16,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23577 states and 35672 transitions. [2020-10-13 14:50:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:16,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:16,134 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 14:50:16,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:50:16,135 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 843534956, now seen corresponding path program 1 times [2020-10-13 14:50:16,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:16,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033820668] [2020-10-13 14:50:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:16,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:16,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:18,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1954 [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:50:18,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:50:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 14:50:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:18,449 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:18,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:18,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:18,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:18,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:50:18,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:18,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:18,500 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 14:50:18,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033820668] [2020-10-13 14:50:18,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:18,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:50:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365759511] [2020-10-13 14:50:18,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:50:18,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:50:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:18,503 INFO L87 Difference]: Start difference. First operand 23577 states and 35672 transitions. Second operand 9 states. [2020-10-13 14:50:18,765 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:50:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:29,003 INFO L93 Difference]: Finished difference Result 144981 states and 217722 transitions. [2020-10-13 14:50:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:50:29,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:50:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:29,393 INFO L225 Difference]: With dead ends: 144981 [2020-10-13 14:50:29,393 INFO L226 Difference]: Without dead ends: 122033 [2020-10-13 14:50:29,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:50:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122033 states. [2020-10-13 14:50:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122033 to 23675. [2020-10-13 14:50:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23675 states. [2020-10-13 14:50:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23675 states to 23675 states and 35784 transitions. [2020-10-13 14:50:32,007 INFO L78 Accepts]: Start accepts. Automaton has 23675 states and 35784 transitions. Word has length 89 [2020-10-13 14:50:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:32,007 INFO L479 AbstractCegarLoop]: Abstraction has 23675 states and 35784 transitions. [2020-10-13 14:50:32,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:50:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23675 states and 35784 transitions. [2020-10-13 14:50:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:32,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:32,018 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 14:50:32,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:50:32,018 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:32,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1951809420, now seen corresponding path program 1 times [2020-10-13 14:50:32,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:32,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852468761] [2020-10-13 14:50:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:32,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:32,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:33,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:33,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:33,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:33,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1402 [2020-10-13 14:50:33,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:33,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:50:33,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:50:33,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 14:50:33,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:33,812 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:33,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:33,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:33,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:33,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:50:33,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:33,855 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 14:50:33,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852468761] [2020-10-13 14:50:33,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:33,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:50:33,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955239508] [2020-10-13 14:50:33,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:50:33,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:33,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:50:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:33,857 INFO L87 Difference]: Start difference. First operand 23675 states and 35784 transitions. Second operand 9 states. [2020-10-13 14:50:34,090 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:50:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:45,450 INFO L93 Difference]: Finished difference Result 111671 states and 168122 transitions. [2020-10-13 14:50:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:50:45,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:50:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:45,661 INFO L225 Difference]: With dead ends: 111671 [2020-10-13 14:50:45,661 INFO L226 Difference]: Without dead ends: 100693 [2020-10-13 14:50:45,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:50:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100693 states. [2020-10-13 14:50:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100693 to 24166. [2020-10-13 14:50:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24166 states. [2020-10-13 14:50:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 36489 transitions. [2020-10-13 14:50:49,364 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 36489 transitions. Word has length 89 [2020-10-13 14:50:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:49,364 INFO L479 AbstractCegarLoop]: Abstraction has 24166 states and 36489 transitions. [2020-10-13 14:50:49,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:50:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 36489 transitions. [2020-10-13 14:50:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:49,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:49,375 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 14:50:49,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:50:49,375 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:49,376 INFO L82 PathProgramCache]: Analyzing trace with hash 776299500, now seen corresponding path program 1 times [2020-10-13 14:50:49,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:49,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126448800] [2020-10-13 14:50:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:49,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:50,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:50,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:50,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-13 14:50:50,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:50,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:50:50,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:50:50,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:50:50,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:51,130 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:50:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:51,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:51,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:51,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:51,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:50:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:51,174 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 14:50:51,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126448800] [2020-10-13 14:50:51,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:51,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:50:51,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14207088] [2020-10-13 14:50:51,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:50:51,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:50:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:51,176 INFO L87 Difference]: Start difference. First operand 24166 states and 36489 transitions. Second operand 9 states. [2020-10-13 14:50:51,401 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:51:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:03,788 INFO L93 Difference]: Finished difference Result 108147 states and 163146 transitions. [2020-10-13 14:51:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:51:03,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:51:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:03,944 INFO L225 Difference]: With dead ends: 108147 [2020-10-13 14:51:03,944 INFO L226 Difference]: Without dead ends: 102268 [2020-10-13 14:51:03,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:51:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102268 states. [2020-10-13 14:51:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102268 to 24166. [2020-10-13 14:51:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24166 states. [2020-10-13 14:51:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 36485 transitions. [2020-10-13 14:51:06,941 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 36485 transitions. Word has length 89 [2020-10-13 14:51:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:06,941 INFO L479 AbstractCegarLoop]: Abstraction has 24166 states and 36485 transitions. [2020-10-13 14:51:06,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:51:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 36485 transitions. [2020-10-13 14:51:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:51:06,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:06,950 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 14:51:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:51:06,951 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1165417260, now seen corresponding path program 1 times [2020-10-13 14:51:06,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:06,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078253770] [2020-10-13 14:51:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:06,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:07,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:07,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:08,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:08,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:51:08,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:08,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1890 [2020-10-13 14:51:08,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:51:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:51:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 14:51:08,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:09,247 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:09,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:09,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:09,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:09,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:09,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:09,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:51:09,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:09,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:09,302 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 14:51:09,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078253770] [2020-10-13 14:51:09,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:09,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:51:09,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615184920] [2020-10-13 14:51:09,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:51:09,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:51:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:09,305 INFO L87 Difference]: Start difference. First operand 24166 states and 36485 transitions. Second operand 9 states. [2020-10-13 14:51:09,534 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:51:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:25,927 INFO L93 Difference]: Finished difference Result 134615 states and 203106 transitions. [2020-10-13 14:51:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:51:25,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:51:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:26,067 INFO L225 Difference]: With dead ends: 134615 [2020-10-13 14:51:26,067 INFO L226 Difference]: Without dead ends: 118520 [2020-10-13 14:51:26,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:51:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118520 states. [2020-10-13 14:51:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118520 to 24680. [2020-10-13 14:51:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24680 states. [2020-10-13 14:51:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24680 states to 24680 states and 37159 transitions. [2020-10-13 14:51:29,605 INFO L78 Accepts]: Start accepts. Automaton has 24680 states and 37159 transitions. Word has length 89 [2020-10-13 14:51:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:29,605 INFO L479 AbstractCegarLoop]: Abstraction has 24680 states and 37159 transitions. [2020-10-13 14:51:29,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:51:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 24680 states and 37159 transitions. [2020-10-13 14:51:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:51:29,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:29,612 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 14:51:29,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:51:29,613 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2113877708, now seen corresponding path program 1 times [2020-10-13 14:51:29,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:29,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374315325] [2020-10-13 14:51:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:31,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:51:31,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-13 14:51:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:51:31,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:51:31,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 14:51:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:31,452 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:31,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:31,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:31,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:51:31,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:31,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:31,494 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 14:51:31,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374315325] [2020-10-13 14:51:31,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:31,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:51:31,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445188057] [2020-10-13 14:51:31,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:51:31,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:51:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:51:31,497 INFO L87 Difference]: Start difference. First operand 24680 states and 37159 transitions. Second operand 9 states. [2020-10-13 14:51:31,733 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 14:51:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:51:52,327 INFO L93 Difference]: Finished difference Result 144321 states and 217396 transitions. [2020-10-13 14:51:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:51:52,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-13 14:51:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:51:52,494 INFO L225 Difference]: With dead ends: 144321 [2020-10-13 14:51:52,494 INFO L226 Difference]: Without dead ends: 123333 [2020-10-13 14:51:52,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:51:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123333 states. [2020-10-13 14:51:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123333 to 25288. [2020-10-13 14:51:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25288 states. [2020-10-13 14:51:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25288 states to 25288 states and 37920 transitions. [2020-10-13 14:51:56,889 INFO L78 Accepts]: Start accepts. Automaton has 25288 states and 37920 transitions. Word has length 89 [2020-10-13 14:51:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:51:56,889 INFO L479 AbstractCegarLoop]: Abstraction has 25288 states and 37920 transitions. [2020-10-13 14:51:56,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:51:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25288 states and 37920 transitions. [2020-10-13 14:51:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 14:51:56,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:56,897 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 14:51:56,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:51:56,897 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1735110188, now seen corresponding path program 1 times [2020-10-13 14:51:56,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:56,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460040582] [2020-10-13 14:51:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:56,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:57,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:58,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:51:58,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 14:51:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:51:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:58,454 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:51:58,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:51:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:58,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:51:58,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:51:58,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:51:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:51:58,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:51:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:51:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:51:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:51:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:51:58,490 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 14:51:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460040582] [2020-10-13 14:51:58,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:51:58,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:51:58,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738812853] [2020-10-13 14:51:58,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:51:58,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:51:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:51:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:51:58,493 INFO L87 Difference]: Start difference. First operand 25288 states and 37920 transitions. Second operand 4 states. [2020-10-13 14:51:58,676 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:52:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:06,271 INFO L93 Difference]: Finished difference Result 66311 states and 99985 transitions. [2020-10-13 14:52:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:52:06,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-13 14:52:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:06,319 INFO L225 Difference]: With dead ends: 66311 [2020-10-13 14:52:06,320 INFO L226 Difference]: Without dead ends: 44389 [2020-10-13 14:52:06,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:52:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44389 states. [2020-10-13 14:52:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44389 to 44147. [2020-10-13 14:52:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44147 states. [2020-10-13 14:52:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44147 states to 44147 states and 65990 transitions. [2020-10-13 14:52:13,829 INFO L78 Accepts]: Start accepts. Automaton has 44147 states and 65990 transitions. Word has length 90 [2020-10-13 14:52:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:13,830 INFO L479 AbstractCegarLoop]: Abstraction has 44147 states and 65990 transitions. [2020-10-13 14:52:13,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:52:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44147 states and 65990 transitions. [2020-10-13 14:52:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 14:52:13,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:13,840 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 14:52:13,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:52:13,841 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash -686322096, now seen corresponding path program 1 times [2020-10-13 14:52:13,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:13,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311791399] [2020-10-13 14:52:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:13,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:13,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:13,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 14:52:13,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:13,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 14:52:13,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:52:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:52:13,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 14:52:13,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:14,169 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:52:14,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:14,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:14,199 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 14:52:14,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311791399] [2020-10-13 14:52:14,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:14,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:14,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868842645] [2020-10-13 14:52:14,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:52:14,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:52:14,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:52:14,201 INFO L87 Difference]: Start difference. First operand 44147 states and 65990 transitions. Second operand 5 states. [2020-10-13 14:52:14,405 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 14:52:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:27,707 INFO L93 Difference]: Finished difference Result 120039 states and 179432 transitions. [2020-10-13 14:52:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:52:27,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-10-13 14:52:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:27,804 INFO L225 Difference]: With dead ends: 120039 [2020-10-13 14:52:27,805 INFO L226 Difference]: Without dead ends: 79413 [2020-10-13 14:52:27,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79413 states. [2020-10-13 14:52:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79413 to 79411. [2020-10-13 14:52:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79411 states. [2020-10-13 14:52:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79411 states to 79411 states and 117958 transitions. [2020-10-13 14:52:41,725 INFO L78 Accepts]: Start accepts. Automaton has 79411 states and 117958 transitions. Word has length 90 [2020-10-13 14:52:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:41,725 INFO L479 AbstractCegarLoop]: Abstraction has 79411 states and 117958 transitions. [2020-10-13 14:52:41,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:52:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 79411 states and 117958 transitions. [2020-10-13 14:52:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 14:52:41,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:41,735 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 14:52:41,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:52:41,735 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1054102195, now seen corresponding path program 1 times [2020-10-13 14:52:41,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:41,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729756589] [2020-10-13 14:52:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:41,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:41,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:42,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:43,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:52:43,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:52:43,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:43,361 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:52:43,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:43,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:43,383 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 14:52:43,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729756589] [2020-10-13 14:52:43,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:43,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:52:43,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129080879] [2020-10-13 14:52:43,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:52:43,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:52:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:52:43,388 INFO L87 Difference]: Start difference. First operand 79411 states and 117958 transitions. Second operand 4 states. [2020-10-13 14:52:43,573 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:53:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:00,234 INFO L93 Difference]: Finished difference Result 118840 states and 176230 transitions. [2020-10-13 14:53:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:00,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-10-13 14:53:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:00,348 INFO L225 Difference]: With dead ends: 118840 [2020-10-13 14:53:00,348 INFO L226 Difference]: Without dead ends: 97730 [2020-10-13 14:53:00,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97730 states. [2020-10-13 14:53:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97730 to 88176. [2020-10-13 14:53:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88176 states. [2020-10-13 14:53:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88176 states to 88176 states and 129350 transitions. [2020-10-13 14:53:17,623 INFO L78 Accepts]: Start accepts. Automaton has 88176 states and 129350 transitions. Word has length 90 [2020-10-13 14:53:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:17,623 INFO L479 AbstractCegarLoop]: Abstraction has 88176 states and 129350 transitions. [2020-10-13 14:53:17,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 88176 states and 129350 transitions. [2020-10-13 14:53:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 14:53:17,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:17,634 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 14:53:17,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:53:17,635 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -790429354, now seen corresponding path program 1 times [2020-10-13 14:53:17,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:17,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646596312] [2020-10-13 14:53:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:17,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:19,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 14:53:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:53:19,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:19,349 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:53:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:19,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:19,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:19,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:19,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:19,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:53:19,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:19,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:19,370 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 14:53:19,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646596312] [2020-10-13 14:53:19,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:19,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877601761] [2020-10-13 14:53:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:19,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:19,372 INFO L87 Difference]: Start difference. First operand 88176 states and 129350 transitions. Second operand 4 states. [2020-10-13 14:53:19,561 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 155