/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:25:11,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:25:11,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:25:11,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:25:11,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:25:11,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:25:11,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:25:11,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:25:11,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:25:11,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:25:11,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:25:11,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:25:11,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:25:11,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:25:11,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:25:11,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:25:11,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:25:11,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:25:11,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:25:11,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:25:11,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:25:11,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:25:11,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:25:11,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:25:11,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:25:11,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:25:11,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:25:11,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:25:11,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:25:11,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:25:11,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:25:11,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:25:11,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:25:11,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:25:11,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:25:11,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:25:11,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:25:11,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:25:11,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:25:11,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:25:11,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:25:11,490 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 [2020-10-28 19:25:11,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:25:11,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:25:11,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:25:11,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:25:11,547 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:25:11,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:25:11,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:25:11,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:25:11,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:25:11,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:25:11,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:25:11,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:25:11,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:25:11,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:25:11,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:25:11,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:25:11,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:25:11,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:25:11,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:25:11,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:25:11,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:25:11,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:25:11,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:25:11,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:25:11,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:25:11,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:25:11,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:25:11,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:25:11,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:25:11,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:25:11,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:25:11,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:25:11,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:25:11,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:25:11,992 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:25:11,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 19:25:12,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bf7492d2/00c4463d20bb4a2aa48ca2e5c713ce5b/FLAG3f166e356 [2020-10-28 19:25:12,942 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:25:12,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 19:25:12,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bf7492d2/00c4463d20bb4a2aa48ca2e5c713ce5b/FLAG3f166e356 [2020-10-28 19:25:13,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bf7492d2/00c4463d20bb4a2aa48ca2e5c713ce5b [2020-10-28 19:25:13,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:25:13,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:25:13,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:25:13,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:25:13,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:25:13,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:25:13" (1/1) ... [2020-10-28 19:25:13,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdda6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:13, skipping insertion in model container [2020-10-28 19:25:13,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:25:13" (1/1) ... [2020-10-28 19:25:13,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:25:13,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:25:15,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:25:15,428 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:25:16,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:25:16,464 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:25:16,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16 WrapperNode [2020-10-28 19:25:16,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:25:16,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:25:16,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:25:16,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:25:16,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (1/1) ... [2020-10-28 19:25:16,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:25:16,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:25:16,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:25:16,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:25:16,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (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 [2020-10-28 19:25:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:25:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:25:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:25:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:25:16,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:25:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:25:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:25:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:25:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:25:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:25:16,844 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:25:16,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:25:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:25:16,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:25:22,018 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:25:22,019 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:25:22,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:25:22 BoogieIcfgContainer [2020-10-28 19:25:22,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:25:22,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:25:22,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:25:22,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:25:22,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:25:13" (1/3) ... [2020-10-28 19:25:22,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300d93f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:25:22, skipping insertion in model container [2020-10-28 19:25:22,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:25:16" (2/3) ... [2020-10-28 19:25:22,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300d93f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:25:22, skipping insertion in model container [2020-10-28 19:25:22,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:25:22" (3/3) ... [2020-10-28 19:25:22,035 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 19:25:22,048 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:25:22,058 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:25:22,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:25:22,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:25:22,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:25:22,123 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:25:22,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:25:22,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:25:22,123 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:25:22,123 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:25:22,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:25:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states. [2020-10-28 19:25:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-28 19:25:22,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:22,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:22,213 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:22,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1619916153, now seen corresponding path program 1 times [2020-10-28 19:25:22,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:22,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848771980] [2020-10-28 19:25:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:25,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:28,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:28,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:28,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:28,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-28 19:25:28,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:25:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-28 19:25:28,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:28,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:28,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-10-28 19:25:28,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:25:31,620 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:25:31,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:31,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:31,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:31,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:31,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 19:25:31,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:31,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848771980] [2020-10-28 19:25:32,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:32,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924913245] [2020-10-28 19:25:32,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:32,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:32,348 INFO L87 Difference]: Start difference. First operand 1488 states. Second operand 5 states. [2020-10-28 19:25:49,300 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 19:25:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:52,768 INFO L93 Difference]: Finished difference Result 4393 states and 7935 transitions. [2020-10-28 19:25:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:25:52,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-10-28 19:25:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:52,811 INFO L225 Difference]: With dead ends: 4393 [2020-10-28 19:25:52,811 INFO L226 Difference]: Without dead ends: 2916 [2020-10-28 19:25:52,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2020-10-28 19:25:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2884. [2020-10-28 19:25:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2884 states. [2020-10-28 19:25:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 4754 transitions. [2020-10-28 19:25:53,077 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 4754 transitions. Word has length 485 [2020-10-28 19:25:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:53,085 INFO L481 AbstractCegarLoop]: Abstraction has 2884 states and 4754 transitions. [2020-10-28 19:25:53,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 4754 transitions. [2020-10-28 19:25:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-28 19:25:53,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:53,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:53,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:25:53,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1058248803, now seen corresponding path program 1 times [2020-10-28 19:25:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:53,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325290896] [2020-10-28 19:25:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:58,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 495 [2020-10-28 19:25:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:25:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 19:25:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:58,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 255 [2020-10-28 19:25:58,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:00,073 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:26:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:00,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:00,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:00,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:00,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 19:26:00,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:00,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:00,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:00,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:00,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325290896] [2020-10-28 19:26:00,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:00,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637168388] [2020-10-28 19:26:00,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:00,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:00,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:00,698 INFO L87 Difference]: Start difference. First operand 2884 states and 4754 transitions. Second operand 5 states. [2020-10-28 19:26:15,644 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 19:26:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:19,164 INFO L93 Difference]: Finished difference Result 8560 states and 14109 transitions. [2020-10-28 19:26:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:19,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-10-28 19:26:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:19,198 INFO L225 Difference]: With dead ends: 8560 [2020-10-28 19:26:19,199 INFO L226 Difference]: Without dead ends: 5695 [2020-10-28 19:26:19,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2020-10-28 19:26:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5642. [2020-10-28 19:26:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2020-10-28 19:26:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 9264 transitions. [2020-10-28 19:26:19,460 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 9264 transitions. Word has length 487 [2020-10-28 19:26:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:19,462 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 9264 transitions. [2020-10-28 19:26:19,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 9264 transitions. [2020-10-28 19:26:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-28 19:26:19,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:19,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:19,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:26:19,484 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -904855287, now seen corresponding path program 1 times [2020-10-28 19:26:19,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:19,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54681397] [2020-10-28 19:26:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:19,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:20,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:21,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:21,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:22,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:24,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:24,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-28 19:26:24,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:26:24,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 19:26:24,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:24,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:24,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:26:24,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:26:24,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-28 19:26:24,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:26,181 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:26:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:26,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:26,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:26,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:26:26,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:26,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:26,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54681397] [2020-10-28 19:26:26,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:26,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:26:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049456573] [2020-10-28 19:26:26,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:26:26,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:26:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:26:26,873 INFO L87 Difference]: Start difference. First operand 5642 states and 9264 transitions. Second operand 4 states. [2020-10-28 19:26:46,513 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-28 19:26:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:49,762 INFO L93 Difference]: Finished difference Result 16454 states and 26967 transitions. [2020-10-28 19:26:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:26:49,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-10-28 19:26:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:49,822 INFO L225 Difference]: With dead ends: 16454 [2020-10-28 19:26:49,823 INFO L226 Difference]: Without dead ends: 11115 [2020-10-28 19:26:49,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11115 states. [2020-10-28 19:26:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11115 to 11085. [2020-10-28 19:26:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11085 states. [2020-10-28 19:26:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11085 states to 11085 states and 18141 transitions. [2020-10-28 19:26:50,315 INFO L78 Accepts]: Start accepts. Automaton has 11085 states and 18141 transitions. Word has length 489 [2020-10-28 19:26:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:50,316 INFO L481 AbstractCegarLoop]: Abstraction has 11085 states and 18141 transitions. [2020-10-28 19:26:50,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:26:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11085 states and 18141 transitions. [2020-10-28 19:26:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-28 19:26:50,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:50,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:50,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:26:50,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash 470097528, now seen corresponding path program 1 times [2020-10-28 19:26:50,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:50,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919884083] [2020-10-28 19:26:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:50,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:50,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:51,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:55,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:55,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 498 [2020-10-28 19:26:55,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:26:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5234 [2020-10-28 19:26:55,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:55,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:55,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-28 19:26:55,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:26:57,198 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:26:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:57,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:57,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:57,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:57,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:57,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:57,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919884083] [2020-10-28 19:26:57,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:57,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:57,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396795924] [2020-10-28 19:26:57,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:57,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:57,592 INFO L87 Difference]: Start difference. First operand 11085 states and 18141 transitions. Second operand 5 states. [2020-10-28 19:27:12,451 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 19:27:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:16,095 INFO L93 Difference]: Finished difference Result 32378 states and 52868 transitions. [2020-10-28 19:27:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:16,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-10-28 19:27:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:16,169 INFO L225 Difference]: With dead ends: 32378 [2020-10-28 19:27:16,169 INFO L226 Difference]: Without dead ends: 21667 [2020-10-28 19:27:16,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21667 states. [2020-10-28 19:27:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21667 to 21639. [2020-10-28 19:27:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21639 states. [2020-10-28 19:27:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21639 states to 21639 states and 35208 transitions. [2020-10-28 19:27:17,205 INFO L78 Accepts]: Start accepts. Automaton has 21639 states and 35208 transitions. Word has length 490 [2020-10-28 19:27:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:17,205 INFO L481 AbstractCegarLoop]: Abstraction has 21639 states and 35208 transitions. [2020-10-28 19:27:17,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21639 states and 35208 transitions. [2020-10-28 19:27:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-28 19:27:17,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:17,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:17,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:27:17,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash 883694589, now seen corresponding path program 1 times [2020-10-28 19:27:17,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:17,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367497082] [2020-10-28 19:27:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:17,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:22,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:22,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 501 [2020-10-28 19:27:22,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:27:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 19:27:22,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:22,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:27:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:27:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 19:27:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:23,876 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:27:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:23,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:23,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:23,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:23,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367497082] [2020-10-28 19:27:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:27:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157864725] [2020-10-28 19:27:24,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:27:24,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:24,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:27:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:24,217 INFO L87 Difference]: Start difference. First operand 21639 states and 35208 transitions. Second operand 5 states. [2020-10-28 19:27:39,567 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 19:27:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:43,082 INFO L93 Difference]: Finished difference Result 64061 states and 104124 transitions. [2020-10-28 19:27:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:43,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-10-28 19:27:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:43,199 INFO L225 Difference]: With dead ends: 64061 [2020-10-28 19:27:43,199 INFO L226 Difference]: Without dead ends: 42636 [2020-10-28 19:27:43,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42636 states. [2020-10-28 19:27:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42636 to 42617. [2020-10-28 19:27:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42617 states. [2020-10-28 19:27:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42617 states to 42617 states and 68974 transitions. [2020-10-28 19:27:45,130 INFO L78 Accepts]: Start accepts. Automaton has 42617 states and 68974 transitions. Word has length 493 [2020-10-28 19:27:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:45,131 INFO L481 AbstractCegarLoop]: Abstraction has 42617 states and 68974 transitions. [2020-10-28 19:27:45,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42617 states and 68974 transitions. [2020-10-28 19:27:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-10-28 19:27:45,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:45,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:45,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:27:45,395 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1624193921, now seen corresponding path program 1 times [2020-10-28 19:27:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:45,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677188207] [2020-10-28 19:27:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:45,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:50,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:50,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-10-28 19:27:50,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:27:50,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:27:50,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:50,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:27:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:27:50,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 19:27:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:51,970 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:27:51,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:51,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:51,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:51,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:51,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:51,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:27:51,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:52,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:52,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:52,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:52,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677188207] [2020-10-28 19:27:52,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:52,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:27:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392526051] [2020-10-28 19:27:52,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:27:52,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:27:52,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:52,319 INFO L87 Difference]: Start difference. First operand 42617 states and 68974 transitions. Second operand 5 states. [2020-10-28 19:28:09,557 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-28 19:28:13,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:13,395 INFO L93 Difference]: Finished difference Result 93278 states and 151613 transitions. [2020-10-28 19:28:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:28:13,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 495 [2020-10-28 19:28:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:13,506 INFO L225 Difference]: With dead ends: 93278 [2020-10-28 19:28:13,506 INFO L226 Difference]: Without dead ends: 50962 [2020-10-28 19:28:13,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:28:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50962 states. [2020-10-28 19:28:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50962 to 42564. [2020-10-28 19:28:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42564 states. [2020-10-28 19:28:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42564 states to 42564 states and 68833 transitions. [2020-10-28 19:28:15,355 INFO L78 Accepts]: Start accepts. Automaton has 42564 states and 68833 transitions. Word has length 495 [2020-10-28 19:28:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:15,356 INFO L481 AbstractCegarLoop]: Abstraction has 42564 states and 68833 transitions. [2020-10-28 19:28:15,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 42564 states and 68833 transitions. [2020-10-28 19:28:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-28 19:28:15,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:15,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:15,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:28:15,401 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash -491298536, now seen corresponding path program 1 times [2020-10-28 19:28:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:15,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918810440] [2020-10-28 19:28:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:20,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:20,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 506 [2020-10-28 19:28:20,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:28:20,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:28:20,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:22,069 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-28 19:28:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:22,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:22,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:22,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:28:22,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:22,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:22,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:22,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:28:22,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918810440] [2020-10-28 19:28:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:22,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:22,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113721447] [2020-10-28 19:28:22,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:22,375 INFO L87 Difference]: Start difference. First operand 42564 states and 68833 transitions. Second operand 5 states. [2020-10-28 19:28:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:48,956 INFO L93 Difference]: Finished difference Result 123569 states and 199199 transitions. [2020-10-28 19:28:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:28:48,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-10-28 19:28:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:49,096 INFO L225 Difference]: With dead ends: 123569 [2020-10-28 19:28:49,097 INFO L226 Difference]: Without dead ends: 84739 [2020-10-28 19:28:49,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:28:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84739 states. [2020-10-28 19:28:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84739 to 46759. [2020-10-28 19:28:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46759 states. [2020-10-28 19:28:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46759 states to 46759 states and 76242 transitions. [2020-10-28 19:28:51,606 INFO L78 Accepts]: Start accepts. Automaton has 46759 states and 76242 transitions. Word has length 498 [2020-10-28 19:28:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:51,606 INFO L481 AbstractCegarLoop]: Abstraction has 46759 states and 76242 transitions. [2020-10-28 19:28:51,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 46759 states and 76242 transitions. [2020-10-28 19:28:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-28 19:28:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:51,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:51,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:28:51,663 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1318957886, now seen corresponding path program 1 times [2020-10-28 19:28:51,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:51,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674950367] [2020-10-28 19:28:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:51,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:52,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:52,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking...