/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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:26:32,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:26:32,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:26:32,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:26:32,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:26:32,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:26:32,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:26:32,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:26:32,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:26:32,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:26:32,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:26:32,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:26:32,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:26:32,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:26:32,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:26:32,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:26:32,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:26:32,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:26:32,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:26:32,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:26:32,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:26:32,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:26:32,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:26:32,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:26:32,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:26:32,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:26:32,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:26:32,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:26:32,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:26:32,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:26:32,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:26:32,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:26:32,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:26:32,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:26:32,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:26:32,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:26:32,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:26:32,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:26:32,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:26:32,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:26:32,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:26:32,509 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 19:26:32,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:26:32,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:26:32,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:26:32,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:26:32,585 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:26:32,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:26:32,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:26:32,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:26:32,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:26:32,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:26:32,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:26:32,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:26:32,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:26:32,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:26:32,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:26:32,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:26:32,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:26:32,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:26:32,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:26:32,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:26:32,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:26:32,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:26:32,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:26:32,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:26:32,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:26:32,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:26:32,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:26:32,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:26:32,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:26:32,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:26:33,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:26:33,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:26:33,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:26:33,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:26:33,110 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:26:33,111 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:26:33,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75477127/61869904777c48d9a4b6551ef1f52dc2/FLAG391d9c040 [2020-10-28 19:26:34,202 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:26:34,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:26:34,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75477127/61869904777c48d9a4b6551ef1f52dc2/FLAG391d9c040 [2020-10-28 19:26:34,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c75477127/61869904777c48d9a4b6551ef1f52dc2 [2020-10-28 19:26:34,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:26:34,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:26:34,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:26:34,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:26:34,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:26:34,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:26:34" (1/1) ... [2020-10-28 19:26:34,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4980f8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:34, skipping insertion in model container [2020-10-28 19:26:34,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:26:34" (1/1) ... [2020-10-28 19:26:34,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:26:35,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:26:36,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:26:36,683 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:26:37,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:26:37,648 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:26:37,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37 WrapperNode [2020-10-28 19:26:37,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:26:37,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:26:37,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:26:37,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:26:37,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (1/1) ... [2020-10-28 19:26:37,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:26:37,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:26:37,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:26:37,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:26:37,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (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 19:26:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:26:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:26:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:26:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:26:38,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:26:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:26:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:26:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:26:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:26:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:26:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:26:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:26:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:26:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:26:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:26:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:26:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:26:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:26:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:26:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:26:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:26:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:26:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:26:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:26:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:26:43,212 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:26:43,213 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:26:43,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:26:43 BoogieIcfgContainer [2020-10-28 19:26:43,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:26:43,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:26:43,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:26:43,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:26:43,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:26:34" (1/3) ... [2020-10-28 19:26:43,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3002f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:26:43, skipping insertion in model container [2020-10-28 19:26:43,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:26:37" (2/3) ... [2020-10-28 19:26:43,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3002f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:26:43, skipping insertion in model container [2020-10-28 19:26:43,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:26:43" (3/3) ... [2020-10-28 19:26:43,232 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:26:43,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:26:43,252 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:26:43,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:26:43,315 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:26:43,315 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:26:43,315 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:26:43,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:26:43,316 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:26:43,316 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:26:43,316 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:26:43,316 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:26:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states. [2020-10-28 19:26:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-28 19:26:43,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:43,419 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] [2020-10-28 19:26:43,420 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash 996821993, now seen corresponding path program 1 times [2020-10-28 19:26:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:43,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644351032] [2020-10-28 19:26:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:44,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:45,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:47,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:48,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:49,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:49,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-28 19:26:49,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:26:49,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5420 [2020-10-28 19:26:49,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:49,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:49,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:49,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 291 [2020-10-28 19:26:49,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:26:51,989 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:26:51,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:52,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:52,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:52,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 19:26:52,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:52,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:52,812 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 19:26:52,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644351032] [2020-10-28 19:26:52,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:52,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:52,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479125464] [2020-10-28 19:26:52,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:52,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:52,841 INFO L87 Difference]: Start difference. First operand 1453 states. Second operand 5 states. [2020-10-28 19:27:09,228 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:27:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:13,067 INFO L93 Difference]: Finished difference Result 4296 states and 7733 transitions. [2020-10-28 19:27:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:27:13,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-10-28 19:27:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:13,112 INFO L225 Difference]: With dead ends: 4296 [2020-10-28 19:27:13,112 INFO L226 Difference]: Without dead ends: 2852 [2020-10-28 19:27:13,124 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 19:27:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2020-10-28 19:27:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2849. [2020-10-28 19:27:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2849 states. [2020-10-28 19:27:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 4686 transitions. [2020-10-28 19:27:13,417 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 4686 transitions. Word has length 497 [2020-10-28 19:27:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:13,423 INFO L481 AbstractCegarLoop]: Abstraction has 2849 states and 4686 transitions. [2020-10-28 19:27:13,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 4686 transitions. [2020-10-28 19:27:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-28 19:27:13,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:13,448 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 19:27:13,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:27:13,449 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:13,450 INFO L82 PathProgramCache]: Analyzing trace with hash -67459316, now seen corresponding path program 1 times [2020-10-28 19:27:13,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:13,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697576700] [2020-10-28 19:27:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:16,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:17,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-28 19:27:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:27:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-28 19:27:18,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:18,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 19:27:18,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 347 [2020-10-28 19:27:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:20,762 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:27:20,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:20,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:20,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:20,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:20,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 19:27:20,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:20,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:20,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:20,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:21,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697576700] [2020-10-28 19:27:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710633317] [2020-10-28 19:27:21,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:21,364 INFO L87 Difference]: Start difference. First operand 2849 states and 4686 transitions. Second operand 4 states. [2020-10-28 19:27:41,166 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 19:27:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:44,688 INFO L93 Difference]: Finished difference Result 8269 states and 13563 transitions. [2020-10-28 19:27:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:27:44,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-10-28 19:27:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:44,721 INFO L225 Difference]: With dead ends: 8269 [2020-10-28 19:27:44,722 INFO L226 Difference]: Without dead ends: 5634 [2020-10-28 19:27:44,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2020-10-28 19:27:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5631. [2020-10-28 19:27:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5631 states. [2020-10-28 19:27:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 9234 transitions. [2020-10-28 19:27:44,986 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 9234 transitions. Word has length 499 [2020-10-28 19:27:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:44,987 INFO L481 AbstractCegarLoop]: Abstraction has 5631 states and 9234 transitions. [2020-10-28 19:27:44,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:27:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 9234 transitions. [2020-10-28 19:27:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-28 19:27:45,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:45,014 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, 1] [2020-10-28 19:27:45,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:27:45,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 710073977, now seen corresponding path program 1 times [2020-10-28 19:27:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524849907] [2020-10-28 19:27:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:48,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:50,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:50,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 508 [2020-10-28 19:27:50,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:27:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5270 [2020-10-28 19:27:50,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:50,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:27:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 247 [2020-10-28 19:27:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:27:51,976 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:27:51,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:51,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:52,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:52,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:52,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:52,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:52,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:52,485 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 19:27:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524849907] [2020-10-28 19:27:52,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:52,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303567936] [2020-10-28 19:27:52,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:52,489 INFO L87 Difference]: Start difference. First operand 5631 states and 9234 transitions. Second operand 4 states. [2020-10-28 19:28:11,605 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 19:28:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:14,947 INFO L93 Difference]: Finished difference Result 16291 states and 26617 transitions. [2020-10-28 19:28:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:28:14,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-10-28 19:28:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:15,000 INFO L225 Difference]: With dead ends: 16291 [2020-10-28 19:28:15,000 INFO L226 Difference]: Without dead ends: 11012 [2020-10-28 19:28:15,012 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 19:28:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11012 states. [2020-10-28 19:28:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11012 to 11009. [2020-10-28 19:28:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11009 states. [2020-10-28 19:28:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 17964 transitions. [2020-10-28 19:28:15,532 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 17964 transitions. Word has length 500 [2020-10-28 19:28:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:15,533 INFO L481 AbstractCegarLoop]: Abstraction has 11009 states and 17964 transitions. [2020-10-28 19:28:15,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:28:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 17964 transitions. [2020-10-28 19:28:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-28 19:28:15,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:15,568 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, 1] [2020-10-28 19:28:15,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:28:15,569 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash -860727532, now seen corresponding path program 1 times [2020-10-28 19:28:15,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:15,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479399558] [2020-10-28 19:28:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:15,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:18,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:18,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:18,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:18,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:19,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:20,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 508 [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:20,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:20,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:20,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 19:28:20,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:28:22,410 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:28:22,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:22,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:22,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:22,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:22,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:28:22,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:22,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:22,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:28:22,916 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 19:28:22,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479399558] [2020-10-28 19:28:22,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:22,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:22,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558547940] [2020-10-28 19:28:22,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:22,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:22,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:22,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:22,919 INFO L87 Difference]: Start difference. First operand 11009 states and 17964 transitions. Second operand 5 states. [2020-10-28 19:28:36,979 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-28 19:28:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:28:40,802 INFO L93 Difference]: Finished difference Result 32413 states and 52804 transitions. [2020-10-28 19:28:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:28:40,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-10-28 19:28:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:28:40,882 INFO L225 Difference]: With dead ends: 32413 [2020-10-28 19:28:40,883 INFO L226 Difference]: Without dead ends: 21618 [2020-10-28 19:28:40,906 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 19:28:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21618 states. [2020-10-28 19:28:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21618 to 21615. [2020-10-28 19:28:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21615 states. [2020-10-28 19:28:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21615 states to 21615 states and 35073 transitions. [2020-10-28 19:28:41,839 INFO L78 Accepts]: Start accepts. Automaton has 21615 states and 35073 transitions. Word has length 500 [2020-10-28 19:28:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:41,840 INFO L481 AbstractCegarLoop]: Abstraction has 21615 states and 35073 transitions. [2020-10-28 19:28:41,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:28:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21615 states and 35073 transitions. [2020-10-28 19:28:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-10-28 19:28:41,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:41,891 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, 1, 1, 1] [2020-10-28 19:28:41,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:28:41,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1883709097, now seen corresponding path program 1 times [2020-10-28 19:28:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:41,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69520907] [2020-10-28 19:28:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:41,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:42,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:43,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:45,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:46,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:46,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 510 [2020-10-28 19:28:46,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:28:46,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:28:46,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:46,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:46,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:28:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:28:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-28 19:28:46,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:48,391 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:28:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:48,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:48,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:48,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:48,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 19:28:48,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:48,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:48,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:48,972 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 19:28:48,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69520907] [2020-10-28 19:28:48,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:48,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:28:48,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381322386] [2020-10-28 19:28:48,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:28:48,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:48,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:28:48,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:28:48,975 INFO L87 Difference]: Start difference. First operand 21615 states and 35073 transitions. Second operand 4 states. [2020-10-28 19:29:08,828 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 19:29:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:12,608 INFO L93 Difference]: Finished difference Result 63249 states and 102387 transitions. [2020-10-28 19:29:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:29:12,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-10-28 19:29:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:12,722 INFO L225 Difference]: With dead ends: 63249 [2020-10-28 19:29:12,723 INFO L226 Difference]: Without dead ends: 42638 [2020-10-28 19:29:12,764 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 19:29:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42638 states. [2020-10-28 19:29:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42638 to 42635. [2020-10-28 19:29:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42635 states. [2020-10-28 19:29:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42635 states to 42635 states and 68879 transitions. [2020-10-28 19:29:14,249 INFO L78 Accepts]: Start accepts. Automaton has 42635 states and 68879 transitions. Word has length 502 [2020-10-28 19:29:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:14,250 INFO L481 AbstractCegarLoop]: Abstraction has 42635 states and 68879 transitions. [2020-10-28 19:29:14,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:29:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42635 states and 68879 transitions. [2020-10-28 19:29:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-28 19:29:14,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:14,315 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, 1, 1, 1, 1] [2020-10-28 19:29:14,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:29:14,315 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash -936557078, now seen corresponding path program 1 times [2020-10-28 19:29:14,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:14,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005910063] [2020-10-28 19:29:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:14,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:14,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:16,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:16,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-28 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:21,049 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:29:21,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:21,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:21,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:21,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:21,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:21,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:21,434 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 19:29:21,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005910063] [2020-10-28 19:29:21,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:21,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:29:21,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560011303] [2020-10-28 19:29:21,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:29:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:29:21,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:29:21,442 INFO L87 Difference]: Start difference. First operand 42635 states and 68879 transitions. Second operand 4 states. [2020-10-28 19:29:42,898 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 19:29:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:29:47,039 INFO L93 Difference]: Finished difference Result 125221 states and 201893 transitions. [2020-10-28 19:29:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:29:47,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-10-28 19:29:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:29:47,217 INFO L225 Difference]: With dead ends: 125221 [2020-10-28 19:29:47,218 INFO L226 Difference]: Without dead ends: 83946 [2020-10-28 19:29:47,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83946 states. [2020-10-28 19:29:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83946 to 83943. [2020-10-28 19:29:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83943 states. [2020-10-28 19:29:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83943 states to 83943 states and 134979 transitions. [2020-10-28 19:29:50,416 INFO L78 Accepts]: Start accepts. Automaton has 83943 states and 134979 transitions. Word has length 503 [2020-10-28 19:29:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:29:50,417 INFO L481 AbstractCegarLoop]: Abstraction has 83943 states and 134979 transitions. [2020-10-28 19:29:50,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:29:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 83943 states and 134979 transitions. [2020-10-28 19:29:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-28 19:29:50,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:29:50,531 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, 1, 1, 1, 1] [2020-10-28 19:29:50,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:29:50,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:29:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:29:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1326483845, now seen corresponding path program 1 times [2020-10-28 19:29:50,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:29:50,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109789390] [2020-10-28 19:29:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:29:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:50,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:53,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-10-28 19:29:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:29:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 19:29:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:55,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:29:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:29:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-28 19:29:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:57,154 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 427 [2020-10-28 19:29:57,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:29:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:29:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:29:57,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:29:57,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:29:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:29:57,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:29:57,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:29:57,699 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 19:29:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109789390] [2020-10-28 19:29:57,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:29:57,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:29:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525978349] [2020-10-28 19:29:57,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:29:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:29:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:29:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:29:57,701 INFO L87 Difference]: Start difference. First operand 83943 states and 134979 transitions. Second operand 5 states.