/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:41:01,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:41:01,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:41:01,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:41:01,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:41:01,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:41:01,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:41:01,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:41:01,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:41:01,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:41:01,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:41:01,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:41:01,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:41:01,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:41:01,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:41:01,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:41:01,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:41:01,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:41:01,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:41:01,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:41:01,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:41:01,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:41:01,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:41:01,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:41:01,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:41:01,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:41:01,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:41:01,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:41:01,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:41:01,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:41:01,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:41:01,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:41:01,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:41:01,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:41:01,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:41:01,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:41:01,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:41:01,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:41:01,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:41:01,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:41:01,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:41:01,554 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 [2020-10-27 23:41:01,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:41:01,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:41:01,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:41:01,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:41:01,584 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:41:01,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:41:01,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:41:01,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:41:01,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:41:01,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:41:01,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:41:01,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:41:01,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:41:01,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:41:01,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:41:01,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:41:01,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:41:01,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:41:01,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:41:01,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:41:01,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:41:01,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:01,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:41:01,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:41:01,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:41:01,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:41:01,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:41:01,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:41:01,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:41:01,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:41:01,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:41:02,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:41:02,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:41:02,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:41:02,016 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:41:02,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:41:02,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e452bc3d3/ffef4b7b9933410099767e1baf07726b/FLAGb31bf823a [2020-10-27 23:41:02,916 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:41:02,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:41:02,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e452bc3d3/ffef4b7b9933410099767e1baf07726b/FLAGb31bf823a [2020-10-27 23:41:03,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e452bc3d3/ffef4b7b9933410099767e1baf07726b [2020-10-27 23:41:03,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:41:03,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:41:03,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:03,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:41:03,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:41:03,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbed540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03, skipping insertion in model container [2020-10-27 23:41:03,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:41:03,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:41:03,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:03,551 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:41:03,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:03,666 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:41:03,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03 WrapperNode [2020-10-27 23:41:03,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:03,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:41:03,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:41:03,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:41:03,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (1/1) ... [2020-10-27 23:41:03,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:41:03,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:41:03,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:41:03,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:41:03,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (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 [2020-10-27 23:41:03,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:41:03,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:41:03,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:41:03,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:41:03,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:41:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:41:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:41:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:41:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:41:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:41:04,492 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:41:04,492 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:41:04,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:04 BoogieIcfgContainer [2020-10-27 23:41:04,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:41:04,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:41:04,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:41:04,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:41:04,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:41:03" (1/3) ... [2020-10-27 23:41:04,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9c874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:04, skipping insertion in model container [2020-10-27 23:41:04,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:03" (2/3) ... [2020-10-27 23:41:04,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9c874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:04, skipping insertion in model container [2020-10-27 23:41:04,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:04" (3/3) ... [2020-10-27 23:41:04,510 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 23:41:04,524 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:41:04,530 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:41:04,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:41:04,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:41:04,586 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:41:04,586 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:41:04,586 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:41:04,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:41:04,586 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:41:04,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:41:04,587 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:41:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-10-27 23:41:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 23:41:04,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:04,611 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] [2020-10-27 23:41:04,612 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -423992621, now seen corresponding path program 1 times [2020-10-27 23:41:04,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:04,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112407970] [2020-10-27 23:41:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:04,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:07,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 23:41:07,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:07,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-27 23:41:07,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:41:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:41:07,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:41:07,495 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:07,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:07,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:07,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:41:07,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:07,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:07,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112407970] [2020-10-27 23:41:07,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:07,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952406100] [2020-10-27 23:41:07,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:07,585 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2020-10-27 23:41:07,786 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:08,150 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2020-10-27 23:41:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:08,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 23:41:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:08,163 INFO L225 Difference]: With dead ends: 153 [2020-10-27 23:41:08,163 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 23:41:08,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 23:41:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-27 23:41:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 23:41:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 135 transitions. [2020-10-27 23:41:08,225 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 135 transitions. Word has length 41 [2020-10-27 23:41:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:08,225 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 135 transitions. [2020-10-27 23:41:08,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 135 transitions. [2020-10-27 23:41:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 23:41:08,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:08,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:08,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:41:08,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1549667987, now seen corresponding path program 1 times [2020-10-27 23:41:08,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:08,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145238205] [2020-10-27 23:41:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:11,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 23:41:11,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:11,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2920 [2020-10-27 23:41:11,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:41:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:41:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:11,393 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:11,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:11,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:11,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:11,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:11,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:11,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:11,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:11,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:11,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:11,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145238205] [2020-10-27 23:41:11,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:11,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:11,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177303194] [2020-10-27 23:41:11,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:11,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:11,446 INFO L87 Difference]: Start difference. First operand 94 states and 135 transitions. Second operand 4 states. [2020-10-27 23:41:11,618 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:11,945 INFO L93 Difference]: Finished difference Result 220 states and 333 transitions. [2020-10-27 23:41:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:11,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 23:41:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:11,949 INFO L225 Difference]: With dead ends: 220 [2020-10-27 23:41:11,949 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 23:41:11,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 23:41:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-27 23:41:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 23:41:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 217 transitions. [2020-10-27 23:41:11,976 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 217 transitions. Word has length 42 [2020-10-27 23:41:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:11,976 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 217 transitions. [2020-10-27 23:41:11,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 217 transitions. [2020-10-27 23:41:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 23:41:11,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:11,978 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] [2020-10-27 23:41:11,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:11,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash 758696479, now seen corresponding path program 1 times [2020-10-27 23:41:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504916621] [2020-10-27 23:41:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:13,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 23:41:13,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:41:13,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1434 [2020-10-27 23:41:13,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:41:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:41:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:13,606 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:13,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:13,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:13,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:13,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:13,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504916621] [2020-10-27 23:41:13,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:13,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005737751] [2020-10-27 23:41:13,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:13,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:13,645 INFO L87 Difference]: Start difference. First operand 146 states and 217 transitions. Second operand 4 states. [2020-10-27 23:41:13,793 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:14,117 INFO L93 Difference]: Finished difference Result 360 states and 553 transitions. [2020-10-27 23:41:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:14,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 23:41:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:14,122 INFO L225 Difference]: With dead ends: 360 [2020-10-27 23:41:14,122 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 23:41:14,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 23:41:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-10-27 23:41:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 23:41:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2020-10-27 23:41:14,182 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 43 [2020-10-27 23:41:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:14,183 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2020-10-27 23:41:14,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2020-10-27 23:41:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:41:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:14,186 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] [2020-10-27 23:41:14,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:14,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 724612549, now seen corresponding path program 1 times [2020-10-27 23:41:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:14,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010199166] [2020-10-27 23:41:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:14,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:17,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:41:17,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:17,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3429 [2020-10-27 23:41:17,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:17,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:41:17,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:17,903 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:17,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:17,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:17,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:17,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:17,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:17,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:17,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:17,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:17,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010199166] [2020-10-27 23:41:17,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:17,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640806898] [2020-10-27 23:41:17,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:17,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:17,946 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand 7 states. [2020-10-27 23:41:18,157 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:18,536 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:41:18,699 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:19,041 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:19,190 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:19,534 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:19,728 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:20,081 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:20,125 INFO L93 Difference]: Finished difference Result 1910 states and 2969 transitions. [2020-10-27 23:41:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:20,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-27 23:41:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:20,140 INFO L225 Difference]: With dead ends: 1910 [2020-10-27 23:41:20,140 INFO L226 Difference]: Without dead ends: 1699 [2020-10-27 23:41:20,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-10-27 23:41:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 642. [2020-10-27 23:41:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-10-27 23:41:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 989 transitions. [2020-10-27 23:41:20,252 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 989 transitions. Word has length 44 [2020-10-27 23:41:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:20,255 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 989 transitions. [2020-10-27 23:41:20,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 989 transitions. [2020-10-27 23:41:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:41:20,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:20,265 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] [2020-10-27 23:41:20,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:20,266 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:20,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1559815040, now seen corresponding path program 1 times [2020-10-27 23:41:20,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:20,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020006775] [2020-10-27 23:41:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:20,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:41:20,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:20,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:21,158 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:21,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:21,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:21,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:21,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:21,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:21,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020006775] [2020-10-27 23:41:21,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:21,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465851521] [2020-10-27 23:41:21,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:21,190 INFO L87 Difference]: Start difference. First operand 642 states and 989 transitions. Second operand 6 states. [2020-10-27 23:41:21,372 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:41:21,848 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:22,003 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:22,223 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:22,420 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:22,625 INFO L93 Difference]: Finished difference Result 4356 states and 6785 transitions. [2020-10-27 23:41:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:22,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-27 23:41:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:22,652 INFO L225 Difference]: With dead ends: 4356 [2020-10-27 23:41:22,652 INFO L226 Difference]: Without dead ends: 3737 [2020-10-27 23:41:22,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:41:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-10-27 23:41:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 1258. [2020-10-27 23:41:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-27 23:41:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1905 transitions. [2020-10-27 23:41:22,815 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1905 transitions. Word has length 44 [2020-10-27 23:41:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:22,815 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1905 transitions. [2020-10-27 23:41:22,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1905 transitions. [2020-10-27 23:41:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:41:22,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:22,818 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] [2020-10-27 23:41:22,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:41:22,818 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:22,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:22,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1262547610, now seen corresponding path program 1 times [2020-10-27 23:41:22,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:22,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357974463] [2020-10-27 23:41:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:23,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:41:23,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:41:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-27 23:41:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:41:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:23,749 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:23,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:23,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:23,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357974463] [2020-10-27 23:41:23,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:23,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:23,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599352132] [2020-10-27 23:41:23,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:23,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:23,790 INFO L87 Difference]: Start difference. First operand 1258 states and 1905 transitions. Second operand 6 states. [2020-10-27 23:41:24,044 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:24,599 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:24,774 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:41:25,018 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:41:25,176 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:41:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:25,418 INFO L93 Difference]: Finished difference Result 4972 states and 7557 transitions. [2020-10-27 23:41:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:25,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-27 23:41:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:25,440 INFO L225 Difference]: With dead ends: 4972 [2020-10-27 23:41:25,440 INFO L226 Difference]: Without dead ends: 3737 [2020-10-27 23:41:25,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:41:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-10-27 23:41:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 1258. [2020-10-27 23:41:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-27 23:41:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1881 transitions. [2020-10-27 23:41:25,594 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1881 transitions. Word has length 46 [2020-10-27 23:41:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:25,594 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1881 transitions. [2020-10-27 23:41:25,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1881 transitions. [2020-10-27 23:41:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:41:25,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:25,595 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] [2020-10-27 23:41:25,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:25,596 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1884077243, now seen corresponding path program 1 times [2020-10-27 23:41:25,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:25,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331573069] [2020-10-27 23:41:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:26,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:41:26,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-27 23:41:26,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:41:26,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:41:26,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:41:26,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:26,507 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:26,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:26,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:26,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:26,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:26,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:26,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:26,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:26,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:26,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:26,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331573069] [2020-10-27 23:41:26,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:26,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:41:26,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280711407] [2020-10-27 23:41:26,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:41:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:41:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:26,544 INFO L87 Difference]: Start difference. First operand 1258 states and 1881 transitions. Second operand 5 states. [2020-10-27 23:41:27,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:27,143 INFO L93 Difference]: Finished difference Result 2589 states and 3835 transitions. [2020-10-27 23:41:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:41:27,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-27 23:41:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:27,158 INFO L225 Difference]: With dead ends: 2589 [2020-10-27 23:41:27,159 INFO L226 Difference]: Without dead ends: 2586 [2020-10-27 23:41:27,163 INFO L677 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 [2020-10-27 23:41:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2020-10-27 23:41:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 1354. [2020-10-27 23:41:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1354 states. [2020-10-27 23:41:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1977 transitions. [2020-10-27 23:41:27,321 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1977 transitions. Word has length 46 [2020-10-27 23:41:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:27,322 INFO L481 AbstractCegarLoop]: Abstraction has 1354 states and 1977 transitions. [2020-10-27 23:41:27,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:41:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1977 transitions. [2020-10-27 23:41:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 23:41:27,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:27,323 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] [2020-10-27 23:41:27,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:41:27,323 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2021247641, now seen corresponding path program 1 times [2020-10-27 23:41:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:27,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795125795] [2020-10-27 23:41:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:27,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:27,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 23:41:27,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:41:27,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 23:41:27,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:27,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:41:27,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:41:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:27,921 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:27,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:27,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:41:27,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:27,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795125795] [2020-10-27 23:41:27,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:27,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:27,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233751887] [2020-10-27 23:41:27,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:27,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:27,953 INFO L87 Difference]: Start difference. First operand 1354 states and 1977 transitions. Second operand 4 states. [2020-10-27 23:41:28,112 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:28,565 INFO L93 Difference]: Finished difference Result 3270 states and 4791 transitions. [2020-10-27 23:41:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:28,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 23:41:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:28,576 INFO L225 Difference]: With dead ends: 3270 [2020-10-27 23:41:28,576 INFO L226 Difference]: Without dead ends: 1939 [2020-10-27 23:41:28,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2020-10-27 23:41:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1936. [2020-10-27 23:41:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2020-10-27 23:41:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2799 transitions. [2020-10-27 23:41:28,800 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2799 transitions. Word has length 47 [2020-10-27 23:41:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:28,802 INFO L481 AbstractCegarLoop]: Abstraction has 1936 states and 2799 transitions. [2020-10-27 23:41:28,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2799 transitions. [2020-10-27 23:41:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:41:28,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:28,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:28,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:41:28,805 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 707316226, now seen corresponding path program 1 times [2020-10-27 23:41:28,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:28,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755330622] [2020-10-27 23:41:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:33,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:41:33,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:41:33,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:34,251 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:34,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:34,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:34,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:34,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:34,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:34,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:34,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:34,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:34,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755330622] [2020-10-27 23:41:34,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:41:34,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 23:41:34,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310087871] [2020-10-27 23:41:34,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:41:34,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:41:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:41:34,297 INFO L87 Difference]: Start difference. First operand 1936 states and 2799 transitions. Second operand 11 states. [2020-10-27 23:41:34,513 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:41:35,990 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:36,220 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:36,434 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:37,163 INFO L93 Difference]: Finished difference Result 7726 states and 10975 transitions. [2020-10-27 23:41:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 23:41:37,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-27 23:41:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:37,196 INFO L225 Difference]: With dead ends: 7726 [2020-10-27 23:41:37,196 INFO L226 Difference]: Without dead ends: 5815 [2020-10-27 23:41:37,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 23:41:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5815 states. [2020-10-27 23:41:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5815 to 2346. [2020-10-27 23:41:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-10-27 23:41:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3297 transitions. [2020-10-27 23:41:37,527 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3297 transitions. Word has length 65 [2020-10-27 23:41:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:37,528 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3297 transitions. [2020-10-27 23:41:37,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:41:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3297 transitions. [2020-10-27 23:41:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:41:37,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:37,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:37,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:41:37,530 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1443418108, now seen corresponding path program 1 times [2020-10-27 23:41:37,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:37,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779666731] [2020-10-27 23:41:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:38,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:42,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:41:42,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:41:42,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:42,892 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2020-10-27 23:41:43,214 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:43,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:43,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:43,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:43,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:43,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:43,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:43,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:43,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779666731] [2020-10-27 23:41:43,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:41:43,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:41:43,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951478442] [2020-10-27 23:41:43,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:41:43,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:43,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:41:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:43,257 INFO L87 Difference]: Start difference. First operand 2346 states and 3297 transitions. Second operand 12 states. [2020-10-27 23:41:43,535 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:41:46,594 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:46,807 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:46,993 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:41:47,222 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:41:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:48,763 INFO L93 Difference]: Finished difference Result 9497 states and 13196 transitions. [2020-10-27 23:41:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-27 23:41:48,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 23:41:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:48,805 INFO L225 Difference]: With dead ends: 9497 [2020-10-27 23:41:48,805 INFO L226 Difference]: Without dead ends: 8348 [2020-10-27 23:41:48,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1125, Invalid=6885, Unknown=0, NotChecked=0, Total=8010 [2020-10-27 23:41:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8348 states. [2020-10-27 23:41:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8348 to 3905. [2020-10-27 23:41:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3905 states. [2020-10-27 23:41:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 5497 transitions. [2020-10-27 23:41:49,417 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 5497 transitions. Word has length 65 [2020-10-27 23:41:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:49,418 INFO L481 AbstractCegarLoop]: Abstraction has 3905 states and 5497 transitions. [2020-10-27 23:41:49,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:41:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 5497 transitions. [2020-10-27 23:41:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:41:49,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:49,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:49,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:41:49,421 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2043915400, now seen corresponding path program 1 times [2020-10-27 23:41:49,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:49,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298140020] [2020-10-27 23:41:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:49,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:54,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:41:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:41:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,634 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:54,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:54,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:54,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:54,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:54,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:54,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:54,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:41:54,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298140020] [2020-10-27 23:41:54,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:41:54,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:41:54,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726797714] [2020-10-27 23:41:54,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:54,675 INFO L87 Difference]: Start difference. First operand 3905 states and 5497 transitions. Second operand 6 states. [2020-10-27 23:41:54,871 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 23:41:55,647 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:55,849 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:56,015 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:57,220 INFO L93 Difference]: Finished difference Result 18313 states and 25859 transitions. [2020-10-27 23:41:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:41:57,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:41:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:57,256 INFO L225 Difference]: With dead ends: 18313 [2020-10-27 23:41:57,256 INFO L226 Difference]: Without dead ends: 14433 [2020-10-27 23:41:57,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14433 states. [2020-10-27 23:41:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14433 to 8891. [2020-10-27 23:41:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8891 states. [2020-10-27 23:41:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 12443 transitions. [2020-10-27 23:41:58,476 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 12443 transitions. Word has length 65 [2020-10-27 23:41:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 8891 states and 12443 transitions. [2020-10-27 23:41:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 12443 transitions. [2020-10-27 23:41:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:41:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:58,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:41:58,480 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1255907390, now seen corresponding path program 1 times [2020-10-27 23:41:58,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276509793] [2020-10-27 23:41:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:03,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:42:03,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:42:03,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:03,784 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-10-27 23:42:04,032 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:04,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:04,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:04,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:04,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:04,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:04,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276509793] [2020-10-27 23:42:04,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:04,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 23:42:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802883993] [2020-10-27 23:42:04,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:42:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:42:04,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:42:04,071 INFO L87 Difference]: Start difference. First operand 8891 states and 12443 transitions. Second operand 14 states. [2020-10-27 23:42:04,302 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:07,668 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:07,929 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:42:08,118 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:08,453 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:42:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:12,878 INFO L93 Difference]: Finished difference Result 36016 states and 49039 transitions. [2020-10-27 23:42:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 23:42:12,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-27 23:42:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:12,956 INFO L225 Difference]: With dead ends: 36016 [2020-10-27 23:42:12,956 INFO L226 Difference]: Without dead ends: 30526 [2020-10-27 23:42:12,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 23:42:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30526 states. [2020-10-27 23:42:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30526 to 12392. [2020-10-27 23:42:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12392 states. [2020-10-27 23:42:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12392 states to 12392 states and 17439 transitions. [2020-10-27 23:42:14,680 INFO L78 Accepts]: Start accepts. Automaton has 12392 states and 17439 transitions. Word has length 65 [2020-10-27 23:42:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:14,680 INFO L481 AbstractCegarLoop]: Abstraction has 12392 states and 17439 transitions. [2020-10-27 23:42:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 23:42:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 12392 states and 17439 transitions. [2020-10-27 23:42:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:42:14,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:14,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:14,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:14,684 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -519805508, now seen corresponding path program 1 times [2020-10-27 23:42:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:14,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630474250] [2020-10-27 23:42:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:14,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:19,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:42:19,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,899 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:19,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:19,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630474250] [2020-10-27 23:42:19,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:19,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:42:19,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563028226] [2020-10-27 23:42:19,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:19,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:19,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:19,926 INFO L87 Difference]: Start difference. First operand 12392 states and 17439 transitions. Second operand 6 states. [2020-10-27 23:42:20,116 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:21,039 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:42:21,228 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:24,133 INFO L93 Difference]: Finished difference Result 34759 states and 48455 transitions. [2020-10-27 23:42:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:24,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:42:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:24,193 INFO L225 Difference]: With dead ends: 34759 [2020-10-27 23:42:24,193 INFO L226 Difference]: Without dead ends: 23769 [2020-10-27 23:42:24,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23769 states. [2020-10-27 23:42:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23769 to 15953. [2020-10-27 23:42:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15953 states. [2020-10-27 23:42:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15953 states to 15953 states and 22008 transitions. [2020-10-27 23:42:26,431 INFO L78 Accepts]: Start accepts. Automaton has 15953 states and 22008 transitions. Word has length 65 [2020-10-27 23:42:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:26,431 INFO L481 AbstractCegarLoop]: Abstraction has 15953 states and 22008 transitions. [2020-10-27 23:42:26,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15953 states and 22008 transitions. [2020-10-27 23:42:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:42:26,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:26,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:26,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:42:26,436 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1244027673, now seen corresponding path program 1 times [2020-10-27 23:42:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:26,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496664434] [2020-10-27 23:42:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:31,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:42:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:31,863 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-10-27 23:42:32,131 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:32,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:32,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:32,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496664434] [2020-10-27 23:42:32,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:32,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:42:32,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145510846] [2020-10-27 23:42:32,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:42:32,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:42:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:42:32,168 INFO L87 Difference]: Start difference. First operand 15953 states and 22008 transitions. Second operand 12 states. [2020-10-27 23:42:32,438 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:42:36,084 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:36,289 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:42:36,593 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:42:36,821 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:37,129 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:42:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:47,846 INFO L93 Difference]: Finished difference Result 78088 states and 104393 transitions. [2020-10-27 23:42:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 23:42:47,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-27 23:42:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:47,969 INFO L225 Difference]: With dead ends: 78088 [2020-10-27 23:42:47,970 INFO L226 Difference]: Without dead ends: 71388 [2020-10-27 23:42:48,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=697, Invalid=3859, Unknown=0, NotChecked=0, Total=4556 [2020-10-27 23:42:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71388 states. [2020-10-27 23:42:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71388 to 28077. [2020-10-27 23:42:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28077 states. [2020-10-27 23:42:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28077 states to 28077 states and 38705 transitions. [2020-10-27 23:42:52,981 INFO L78 Accepts]: Start accepts. Automaton has 28077 states and 38705 transitions. Word has length 65 [2020-10-27 23:42:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:52,981 INFO L481 AbstractCegarLoop]: Abstraction has 28077 states and 38705 transitions. [2020-10-27 23:42:52,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:42:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28077 states and 38705 transitions. [2020-10-27 23:42:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:42:52,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:52,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:52,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:42:52,984 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1892469305, now seen corresponding path program 1 times [2020-10-27 23:42:52,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:52,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402151174] [2020-10-27 23:42:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:53,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:58,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:42:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,206 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:58,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:58,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:58,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 23:42:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402151174] [2020-10-27 23:42:58,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:58,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:58,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705155205] [2020-10-27 23:42:58,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:58,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:58,229 INFO L87 Difference]: Start difference. First operand 28077 states and 38705 transitions. Second operand 7 states. [2020-10-27 23:42:58,443 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:42:59,201 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:42:59,393 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:42:59,562 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:59,747 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:43:01,409 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:43:01,592 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:43:03,625 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:43:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:05,742 INFO L93 Difference]: Finished difference Result 56275 states and 77353 transitions. [2020-10-27 23:43:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:43:05,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:43:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:05,809 INFO L225 Difference]: With dead ends: 56275 [2020-10-27 23:43:05,809 INFO L226 Difference]: Without dead ends: 41240 [2020-10-27 23:43:05,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:43:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41240 states. [2020-10-27 23:43:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41240 to 29789. [2020-10-27 23:43:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29789 states. [2020-10-27 23:43:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29789 states to 29789 states and 41048 transitions. [2020-10-27 23:43:10,494 INFO L78 Accepts]: Start accepts. Automaton has 29789 states and 41048 transitions. Word has length 65 [2020-10-27 23:43:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:10,494 INFO L481 AbstractCegarLoop]: Abstraction has 29789 states and 41048 transitions. [2020-10-27 23:43:10,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:43:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29789 states and 41048 transitions. [2020-10-27 23:43:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:43:10,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:10,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:10,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:10,497 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1880589588, now seen corresponding path program 1 times [2020-10-27 23:43:10,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:10,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153482104] [2020-10-27 23:43:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:15,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:43:15,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,702 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:43:15,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:15,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:15,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153482104] [2020-10-27 23:43:15,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:43:15,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:43:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635647085] [2020-10-27 23:43:15,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:15,729 INFO L87 Difference]: Start difference. First operand 29789 states and 41048 transitions. Second operand 6 states. [2020-10-27 23:43:15,915 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:43:17,274 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:43:17,542 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:43:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:28,095 INFO L93 Difference]: Finished difference Result 105346 states and 143765 transitions. [2020-10-27 23:43:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:28,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:43:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:28,194 INFO L225 Difference]: With dead ends: 105346 [2020-10-27 23:43:28,194 INFO L226 Difference]: Without dead ends: 81093 [2020-10-27 23:43:28,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81093 states. [2020-10-27 23:43:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81093 to 50955. [2020-10-27 23:43:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50955 states. [2020-10-27 23:43:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50955 states to 50955 states and 69530 transitions. [2020-10-27 23:43:36,486 INFO L78 Accepts]: Start accepts. Automaton has 50955 states and 69530 transitions. Word has length 65 [2020-10-27 23:43:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:36,486 INFO L481 AbstractCegarLoop]: Abstraction has 50955 states and 69530 transitions. [2020-10-27 23:43:36,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 50955 states and 69530 transitions. [2020-10-27 23:43:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:43:36,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:36,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:36,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:36,492 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1739015828, now seen corresponding path program 1 times [2020-10-27 23:43:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:36,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244753331] [2020-10-27 23:43:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:37,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:41,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:43:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:41,680 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:43:41,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:41,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 23:43:41,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244753331] [2020-10-27 23:43:41,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:41,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:43:41,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110825534] [2020-10-27 23:43:41,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:43:41,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:41,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:43:41,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:43:41,708 INFO L87 Difference]: Start difference. First operand 50955 states and 69530 transitions. Second operand 4 states. [2020-10-27 23:43:42,501 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:43:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:49,016 INFO L93 Difference]: Finished difference Result 94742 states and 129442 transitions. [2020-10-27 23:43:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:43:49,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:43:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:49,086 INFO L225 Difference]: With dead ends: 94742 [2020-10-27 23:43:49,086 INFO L226 Difference]: Without dead ends: 49377 [2020-10-27 23:43:49,129 INFO L677 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 [2020-10-27 23:43:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49377 states. [2020-10-27 23:43:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49377 to 49377. [2020-10-27 23:43:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49377 states. [2020-10-27 23:43:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49377 states to 49377 states and 67074 transitions. [2020-10-27 23:43:56,408 INFO L78 Accepts]: Start accepts. Automaton has 49377 states and 67074 transitions. Word has length 66 [2020-10-27 23:43:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:56,408 INFO L481 AbstractCegarLoop]: Abstraction has 49377 states and 67074 transitions. [2020-10-27 23:43:56,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:43:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49377 states and 67074 transitions. [2020-10-27 23:43:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:43:56,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:56,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:56,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:56,414 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -737935444, now seen corresponding path program 1 times [2020-10-27 23:43:56,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:56,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145573154] [2020-10-27 23:43:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:56,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 23:44:01,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:01,651 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:44:01,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:01,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:44:01,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145573154] [2020-10-27 23:44:01,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:44:01,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 23:44:01,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649426014] [2020-10-27 23:44:01,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:44:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:01,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:44:01,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:01,680 INFO L87 Difference]: Start difference. First operand 49377 states and 67074 transitions. Second operand 5 states. [2020-10-27 23:44:01,991 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:44:02,723 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:44:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:13,874 INFO L93 Difference]: Finished difference Result 117493 states and 160804 transitions. [2020-10-27 23:44:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:44:13,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 23:44:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:14,001 INFO L225 Difference]: With dead ends: 117493 [2020-10-27 23:44:14,001 INFO L226 Difference]: Without dead ends: 81348 [2020-10-27 23:44:14,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:44:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81348 states. [2020-10-27 23:44:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81348 to 81328. [2020-10-27 23:44:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81328 states. [2020-10-27 23:44:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81328 states to 81328 states and 109415 transitions. [2020-10-27 23:44:26,393 INFO L78 Accepts]: Start accepts. Automaton has 81328 states and 109415 transitions. Word has length 66 [2020-10-27 23:44:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:26,393 INFO L481 AbstractCegarLoop]: Abstraction has 81328 states and 109415 transitions. [2020-10-27 23:44:26,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:44:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81328 states and 109415 transitions. [2020-10-27 23:44:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:44:26,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:26,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:26,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:44:26,397 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash 880223785, now seen corresponding path program 1 times [2020-10-27 23:44:26,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:26,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961191172] [2020-10-27 23:44:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:44:31,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:44:31,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:44:31,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:44:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:44:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,622 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:44:31,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:31,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:31,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:31,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961191172] [2020-10-27 23:44:31,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:44:31,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:44:31,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447376974] [2020-10-27 23:44:31,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:31,648 INFO L87 Difference]: Start difference. First operand 81328 states and 109415 transitions. Second operand 6 states. [2020-10-27 23:44:31,862 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 23:44:32,634 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:44:32,833 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 123