/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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:17:40,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:17:40,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:17:40,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:17:40,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:17:40,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:17:40,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:17:40,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:17:40,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:17:40,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:17:40,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:17:40,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:17:40,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:17:40,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:17:40,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:17:40,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:17:40,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:17:40,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:17:40,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:17:40,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:17:40,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:17:40,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:17:40,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:17:40,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:17:40,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:17:40,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:17:40,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:17:40,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:17:40,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:17:40,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:17:40,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:17:40,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:17:40,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:17:40,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:17:40,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:17:40,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:17:40,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:17:40,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:17:40,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:17:40,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:17:40,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:17:40,216 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 18:17:40,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:17:40,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:17:40,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:17:40,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:17:40,270 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:17:40,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:17:40,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:17:40,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:17:40,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:17:40,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:17:40,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:17:40,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:17:40,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:17:40,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:17:40,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:17:40,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:17:40,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:17:40,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:17:40,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:17:40,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:17:40,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:17:40,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:17:40,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:17:40,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:17:40,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:17:40,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:17:40,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:17:40,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:17:40,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:17:40,750 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:17:40,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:17:40,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab497cd3/b7863e53c3fe418aa04134d7cbc67ffd/FLAG85f1b8bc6 [2020-10-28 18:17:41,717 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:17:41,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:17:41,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab497cd3/b7863e53c3fe418aa04134d7cbc67ffd/FLAG85f1b8bc6 [2020-10-28 18:17:41,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ab497cd3/b7863e53c3fe418aa04134d7cbc67ffd [2020-10-28 18:17:41,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:17:41,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:17:41,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:17:41,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:17:41,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:17:41,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:17:41" (1/1) ... [2020-10-28 18:17:41,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aca9a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:41, skipping insertion in model container [2020-10-28 18:17:41,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:17:41" (1/1) ... [2020-10-28 18:17:41,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:17:42,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:17:42,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:17:42,904 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:17:43,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:17:43,310 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:17:43,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43 WrapperNode [2020-10-28 18:17:43,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:17:43,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:17:43,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:17:43,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:17:43,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (1/1) ... [2020-10-28 18:17:43,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:17:43,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:17:43,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:17:43,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:17:43,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (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 18:17:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:17:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:17:43,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:17:43,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:17:43,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:17:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:17:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:17:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:17:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:17:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:17:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:17:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:17:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:17:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:17:43,606 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:17:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:17:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:17:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:17:45,786 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:17:45,787 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:17:45,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:17:45 BoogieIcfgContainer [2020-10-28 18:17:45,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:17:45,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:17:45,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:17:45,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:17:45,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:17:41" (1/3) ... [2020-10-28 18:17:45,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491c3543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:17:45, skipping insertion in model container [2020-10-28 18:17:45,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:17:43" (2/3) ... [2020-10-28 18:17:45,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491c3543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:17:45, skipping insertion in model container [2020-10-28 18:17:45,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:17:45" (3/3) ... [2020-10-28 18:17:45,802 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:17:45,815 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:17:45,821 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:17:45,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:17:45,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:17:45,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:17:45,866 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:17:45,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:17:45,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:17:45,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:17:45,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:17:45,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:17:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states. [2020-10-28 18:17:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-28 18:17:45,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:45,919 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] [2020-10-28 18:17:45,919 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:45,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2127670363, now seen corresponding path program 1 times [2020-10-28 18:17:45,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:45,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415106691] [2020-10-28 18:17:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:47,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:51,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:51,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 18:17:51,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:17:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-28 18:17:51,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:51,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:51,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:51,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:51,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 18:17:51,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:17:52,500 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:17:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:52,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:52,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:52,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:52,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:17:52,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:52,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:52,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:52,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:53,017 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 18:17:53,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415106691] [2020-10-28 18:17:53,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594279734] [2020-10-28 18:17:53,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:53,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:53,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:53,043 INFO L87 Difference]: Start difference. First operand 601 states. Second operand 5 states. [2020-10-28 18:17:59,251 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:00,954 INFO L93 Difference]: Finished difference Result 1755 states and 3123 transitions. [2020-10-28 18:18:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:18:00,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-10-28 18:18:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:00,982 INFO L225 Difference]: With dead ends: 1755 [2020-10-28 18:18:00,982 INFO L226 Difference]: Without dead ends: 1159 [2020-10-28 18:18:00,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-10-28 18:18:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1156. [2020-10-28 18:18:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-10-28 18:18:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1798 transitions. [2020-10-28 18:18:01,163 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1798 transitions. Word has length 243 [2020-10-28 18:18:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:01,166 INFO L481 AbstractCegarLoop]: Abstraction has 1156 states and 1798 transitions. [2020-10-28 18:18:01,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1798 transitions. [2020-10-28 18:18:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 18:18:01,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:01,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:01,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:18:01,189 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash -830961273, now seen corresponding path program 1 times [2020-10-28 18:18:01,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:01,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939624121] [2020-10-28 18:18:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:01,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:01,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:06,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:06,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 18:18:06,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:06,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:18:06,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:06,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:18:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-28 18:18:06,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:07,061 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:18:07,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:07,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:07,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:07,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:07,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:18:07,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:07,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:07,282 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 18:18:07,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939624121] [2020-10-28 18:18:07,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:07,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:07,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647693045] [2020-10-28 18:18:07,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:07,289 INFO L87 Difference]: Start difference. First operand 1156 states and 1798 transitions. Second operand 4 states. [2020-10-28 18:18:13,442 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 18:18:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:15,156 INFO L93 Difference]: Finished difference Result 3272 states and 5057 transitions. [2020-10-28 18:18:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:15,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 245 [2020-10-28 18:18:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:15,172 INFO L225 Difference]: With dead ends: 3272 [2020-10-28 18:18:15,173 INFO L226 Difference]: Without dead ends: 2256 [2020-10-28 18:18:15,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2020-10-28 18:18:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2253. [2020-10-28 18:18:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2253 states. [2020-10-28 18:18:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 3487 transitions. [2020-10-28 18:18:15,323 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 3487 transitions. Word has length 245 [2020-10-28 18:18:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:15,323 INFO L481 AbstractCegarLoop]: Abstraction has 2253 states and 3487 transitions. [2020-10-28 18:18:15,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 3487 transitions. [2020-10-28 18:18:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 18:18:15,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:15,332 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] [2020-10-28 18:18:15,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:18:15,333 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:15,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2007065122, now seen corresponding path program 1 times [2020-10-28 18:18:15,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:15,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709220146] [2020-10-28 18:18:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:15,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:15,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:17,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:20,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 18:18:20,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:18:20,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 18:18:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:20,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 18:18:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:21,337 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:18:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:21,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:21,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:21,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:21,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:21,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:18:21,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:21,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:21,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:21,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:21,529 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 18:18:21,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709220146] [2020-10-28 18:18:21,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:21,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:21,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71035230] [2020-10-28 18:18:21,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:21,537 INFO L87 Difference]: Start difference. First operand 2253 states and 3487 transitions. Second operand 5 states. [2020-10-28 18:18:26,791 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:28,514 INFO L93 Difference]: Finished difference Result 6540 states and 10089 transitions. [2020-10-28 18:18:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:28,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 245 [2020-10-28 18:18:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:28,541 INFO L225 Difference]: With dead ends: 6540 [2020-10-28 18:18:28,541 INFO L226 Difference]: Without dead ends: 4314 [2020-10-28 18:18:28,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2020-10-28 18:18:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 4311. [2020-10-28 18:18:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4311 states. [2020-10-28 18:18:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 6599 transitions. [2020-10-28 18:18:28,768 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 6599 transitions. Word has length 245 [2020-10-28 18:18:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:28,768 INFO L481 AbstractCegarLoop]: Abstraction has 4311 states and 6599 transitions. [2020-10-28 18:18:28,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 6599 transitions. [2020-10-28 18:18:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-28 18:18:28,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:28,779 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] [2020-10-28 18:18:28,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:18:28,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1075762180, now seen corresponding path program 1 times [2020-10-28 18:18:28,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:28,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592417580] [2020-10-28 18:18:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:30,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:32,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:33,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:33,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:33,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:33,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-28 18:18:33,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:34,634 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:18:34,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:34,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:34,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:34,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:18:34,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:34,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:34,840 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 18:18:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592417580] [2020-10-28 18:18:34,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:34,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:34,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764300306] [2020-10-28 18:18:34,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:34,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:34,844 INFO L87 Difference]: Start difference. First operand 4311 states and 6599 transitions. Second operand 5 states. [2020-10-28 18:18:40,510 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:42,478 INFO L93 Difference]: Finished difference Result 12529 states and 19115 transitions. [2020-10-28 18:18:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:42,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-28 18:18:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:42,518 INFO L225 Difference]: With dead ends: 12529 [2020-10-28 18:18:42,518 INFO L226 Difference]: Without dead ends: 8402 [2020-10-28 18:18:42,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2020-10-28 18:18:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 8399. [2020-10-28 18:18:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8399 states. [2020-10-28 18:18:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8399 states to 8399 states and 12758 transitions. [2020-10-28 18:18:43,042 INFO L78 Accepts]: Start accepts. Automaton has 8399 states and 12758 transitions. Word has length 247 [2020-10-28 18:18:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:43,043 INFO L481 AbstractCegarLoop]: Abstraction has 8399 states and 12758 transitions. [2020-10-28 18:18:43,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8399 states and 12758 transitions. [2020-10-28 18:18:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 18:18:43,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:43,061 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] [2020-10-28 18:18:43,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:18:43,061 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2115919004, now seen corresponding path program 1 times [2020-10-28 18:18:43,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:43,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177230401] [2020-10-28 18:18:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:48,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-28 18:18:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:18:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 18:18:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:48,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:18:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:18:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 18:18:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:18:48,881 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:18:48,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:48,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:48,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:48,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:48,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:48,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:49,021 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 18:18:49,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177230401] [2020-10-28 18:18:49,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:49,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:18:49,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818546716] [2020-10-28 18:18:49,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:18:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:18:49,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:18:49,024 INFO L87 Difference]: Start difference. First operand 8399 states and 12758 transitions. Second operand 4 states. [2020-10-28 18:18:54,999 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 18:18:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:56,773 INFO L93 Difference]: Finished difference Result 24337 states and 36805 transitions. [2020-10-28 18:18:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:18:56,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 249 [2020-10-28 18:18:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:56,831 INFO L225 Difference]: With dead ends: 24337 [2020-10-28 18:18:56,831 INFO L226 Difference]: Without dead ends: 16446 [2020-10-28 18:18:56,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16446 states. [2020-10-28 18:18:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16446 to 16443. [2020-10-28 18:18:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16443 states. [2020-10-28 18:18:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16443 states to 16443 states and 24799 transitions. [2020-10-28 18:18:58,025 INFO L78 Accepts]: Start accepts. Automaton has 16443 states and 24799 transitions. Word has length 249 [2020-10-28 18:18:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 16443 states and 24799 transitions. [2020-10-28 18:18:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:18:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 16443 states and 24799 transitions. [2020-10-28 18:18:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 18:18:58,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:58,059 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] [2020-10-28 18:18:58,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:18:58,060 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash 980222335, now seen corresponding path program 1 times [2020-10-28 18:18:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:58,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266592163] [2020-10-28 18:18:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:03,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:03,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 18:19:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:03,940 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:19:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:03,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:03,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:03,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:04,052 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 18:19:04,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266592163] [2020-10-28 18:19:04,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:04,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418669907] [2020-10-28 18:19:04,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:04,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:04,055 INFO L87 Difference]: Start difference. First operand 16443 states and 24799 transitions. Second operand 5 states. [2020-10-28 18:19:10,426 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:13,087 INFO L93 Difference]: Finished difference Result 47560 states and 71337 transitions. [2020-10-28 18:19:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:13,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2020-10-28 18:19:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:13,208 INFO L225 Difference]: With dead ends: 47560 [2020-10-28 18:19:13,208 INFO L226 Difference]: Without dead ends: 32165 [2020-10-28 18:19:13,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32165 states. [2020-10-28 18:19:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32165 to 32162. [2020-10-28 18:19:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32162 states. [2020-10-28 18:19:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32162 states to 32162 states and 48123 transitions. [2020-10-28 18:19:15,206 INFO L78 Accepts]: Start accepts. Automaton has 32162 states and 48123 transitions. Word has length 249 [2020-10-28 18:19:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:15,206 INFO L481 AbstractCegarLoop]: Abstraction has 32162 states and 48123 transitions. [2020-10-28 18:19:15,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32162 states and 48123 transitions. [2020-10-28 18:19:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 18:19:15,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:15,273 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] [2020-10-28 18:19:15,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:19:15,274 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -306395535, now seen corresponding path program 1 times [2020-10-28 18:19:15,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:15,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762055232] [2020-10-28 18:19:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:15,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:20,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:20,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:20,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 18:19:20,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:21,036 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:19:21,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:21,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:21,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:21,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:21,139 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 18:19:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762055232] [2020-10-28 18:19:21,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:21,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244498703] [2020-10-28 18:19:21,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:21,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:21,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:21,142 INFO L87 Difference]: Start difference. First operand 32162 states and 48123 transitions. Second operand 5 states. [2020-10-28 18:19:28,432 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:31,079 INFO L93 Difference]: Finished difference Result 93748 states and 139748 transitions. [2020-10-28 18:19:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:31,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2020-10-28 18:19:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:31,214 INFO L225 Difference]: With dead ends: 93748 [2020-10-28 18:19:31,214 INFO L226 Difference]: Without dead ends: 62817 [2020-10-28 18:19:31,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62817 states. [2020-10-28 18:19:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62817 to 62814. [2020-10-28 18:19:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62814 states. [2020-10-28 18:19:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62814 states to 62814 states and 93076 transitions. [2020-10-28 18:19:35,481 INFO L78 Accepts]: Start accepts. Automaton has 62814 states and 93076 transitions. Word has length 251 [2020-10-28 18:19:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:35,482 INFO L481 AbstractCegarLoop]: Abstraction has 62814 states and 93076 transitions. [2020-10-28 18:19:35,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 62814 states and 93076 transitions. [2020-10-28 18:19:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 18:19:35,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:35,535 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] [2020-10-28 18:19:35,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:19:35,535 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1091148969, now seen corresponding path program 1 times [2020-10-28 18:19:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:35,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512417338] [2020-10-28 18:19:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:35,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:38,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:40,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:40,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 18:19:40,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:19:40,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:19:40,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:40,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 18:19:40,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:41,474 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:19:41,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:41,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:41,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:41,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:19:41,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:41,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:41,613 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 18:19:41,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512417338] [2020-10-28 18:19:41,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:41,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63906718] [2020-10-28 18:19:41,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:41,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:41,616 INFO L87 Difference]: Start difference. First operand 62814 states and 93076 transitions. Second operand 5 states. [2020-10-28 18:19:51,308 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:54,868 INFO L93 Difference]: Finished difference Result 185260 states and 273932 transitions. [2020-10-28 18:19:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:54,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-10-28 18:19:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:55,095 INFO L225 Difference]: With dead ends: 185260 [2020-10-28 18:19:55,095 INFO L226 Difference]: Without dead ends: 122989 [2020-10-28 18:19:55,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122989 states. [2020-10-28 18:20:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122989 to 122986. [2020-10-28 18:20:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122986 states. [2020-10-28 18:20:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122986 states to 122986 states and 180560 transitions. [2020-10-28 18:20:02,764 INFO L78 Accepts]: Start accepts. Automaton has 122986 states and 180560 transitions. Word has length 253 [2020-10-28 18:20:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:02,765 INFO L481 AbstractCegarLoop]: Abstraction has 122986 states and 180560 transitions. [2020-10-28 18:20:02,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 122986 states and 180560 transitions. [2020-10-28 18:20:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 18:20:03,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:03,199 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] [2020-10-28 18:20:03,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:20:03,199 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:03,200 INFO L82 PathProgramCache]: Analyzing trace with hash -266586190, now seen corresponding path program 1 times [2020-10-28 18:20:03,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:03,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115412849] [2020-10-28 18:20:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:03,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:07,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:08,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:08,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 18:20:08,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:20:08,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:20:08,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:08,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:20:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:20:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:08,950 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:20:08,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:08,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:08,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:08,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:09,058 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 18:20:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115412849] [2020-10-28 18:20:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:09,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099495226] [2020-10-28 18:20:09,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:09,061 INFO L87 Difference]: Start difference. First operand 122986 states and 180560 transitions. Second operand 5 states. [2020-10-28 18:20:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:29,266 INFO L93 Difference]: Finished difference Result 357576 states and 522885 transitions. [2020-10-28 18:20:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:20:29,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-10-28 18:20:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:29,997 INFO L225 Difference]: With dead ends: 357576 [2020-10-28 18:20:29,997 INFO L226 Difference]: Without dead ends: 242693 [2020-10-28 18:20:30,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:20:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242693 states. [2020-10-28 18:20:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242693 to 130948. [2020-10-28 18:20:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130948 states. [2020-10-28 18:20:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130948 states to 130948 states and 193410 transitions. [2020-10-28 18:20:40,491 INFO L78 Accepts]: Start accepts. Automaton has 130948 states and 193410 transitions. Word has length 255 [2020-10-28 18:20:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:40,491 INFO L481 AbstractCegarLoop]: Abstraction has 130948 states and 193410 transitions. [2020-10-28 18:20:40,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 130948 states and 193410 transitions. [2020-10-28 18:20:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 18:20:40,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:40,596 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] [2020-10-28 18:20:40,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:20:40,596 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2270581, now seen corresponding path program 1 times [2020-10-28 18:20:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:40,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124935984] [2020-10-28 18:20:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:40,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:42,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:42,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:43,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:45,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:45,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:45,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 18:20:45,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:46,384 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:20:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:46,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:46,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:46,488 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 18:20:46,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124935984] [2020-10-28 18:20:46,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:46,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:46,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529380702] [2020-10-28 18:20:46,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:46,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:46,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:46,490 INFO L87 Difference]: Start difference. First operand 130948 states and 193410 transitions. Second operand 5 states. [2020-10-28 18:20:58,885 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:21:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:03,060 INFO L93 Difference]: Finished difference Result 285488 states and 422240 transitions. [2020-10-28 18:21:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:03,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-10-28 18:21:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:03,436 INFO L225 Difference]: With dead ends: 285488 [2020-10-28 18:21:03,436 INFO L226 Difference]: Without dead ends: 155165 [2020-10-28 18:21:03,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155165 states. [2020-10-28 18:21:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155165 to 134730. [2020-10-28 18:21:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134730 states. [2020-10-28 18:21:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134730 states to 134730 states and 199440 transitions. [2020-10-28 18:21:13,003 INFO L78 Accepts]: Start accepts. Automaton has 134730 states and 199440 transitions. Word has length 256 [2020-10-28 18:21:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:13,004 INFO L481 AbstractCegarLoop]: Abstraction has 134730 states and 199440 transitions. [2020-10-28 18:21:13,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 134730 states and 199440 transitions. [2020-10-28 18:21:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-28 18:21:13,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:13,424 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] [2020-10-28 18:21:13,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:21:13,424 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 853274417, now seen corresponding path program 1 times [2020-10-28 18:21:13,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:13,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218952864] [2020-10-28 18:21:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:14,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:18,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:18,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-28 18:21:18,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:21:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 18:21:18,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:19,218 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-28 18:21:19,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:19,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:19,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:19,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:19,327 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 18:21:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218952864] [2020-10-28 18:21:19,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:19,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:21:19,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344466067] [2020-10-28 18:21:19,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:21:19,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:21:19,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:21:19,329 INFO L87 Difference]: Start difference. First operand 134730 states and 199440 transitions. Second operand 4 states.