/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:21:26,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:21:26,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:21:26,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:21:26,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:21:26,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:21:26,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:21:26,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:21:26,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:21:26,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:21:26,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:21:26,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:21:26,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:21:26,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:21:26,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:21:26,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:21:26,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:21:26,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:21:26,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:21:26,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:21:26,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:21:26,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:21:26,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:21:26,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:21:26,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:21:26,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:21:26,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:21:26,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:21:26,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:21:26,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:21:26,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:21:26,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:21:26,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:21:26,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:21:26,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:21:26,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:21:26,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:21:26,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:21:26,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:21:26,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:21:26,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:21:26,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:21:26,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:21:26,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:21:26,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:21:26,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:21:26,171 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:21:26,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:21:26,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:21:26,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:21:26,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:21:26,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:21:26,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:21:26,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:21:26,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:21:26,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:21:26,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:21:26,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:21:26,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:21:26,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:21:26,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:21:26,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:21:26,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:21:26,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:21:26,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:21:26,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:21:26,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:21:26,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:21:26,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:21:26,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:21:26,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:21:26,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:21:26,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:21:26,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:21:26,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:21:26,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:21:26,620 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:21:26,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 19:21:26,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c32d1eb7a/947b47ce84a44af2891f051301f1ccbf/FLAGa645dc30c [2020-10-28 19:21:27,603 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:21:27,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 19:21:27,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c32d1eb7a/947b47ce84a44af2891f051301f1ccbf/FLAGa645dc30c [2020-10-28 19:21:27,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c32d1eb7a/947b47ce84a44af2891f051301f1ccbf [2020-10-28 19:21:27,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:21:27,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:21:27,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:21:27,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:21:27,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:21:27,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:21:27" (1/1) ... [2020-10-28 19:21:27,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@690193c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:27, skipping insertion in model container [2020-10-28 19:21:27,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:21:27" (1/1) ... [2020-10-28 19:21:27,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:21:27,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:21:29,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:21:29,204 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:21:30,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:21:30,113 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:21:30,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30 WrapperNode [2020-10-28 19:21:30,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:21:30,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:21:30,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:21:30,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:21:30,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... [2020-10-28 19:21:30,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:21:30,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:21:30,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:21:30,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:21:30,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:21:30,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:21:30,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:21:30,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:21:30,436 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:21:30,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:21:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:21:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:21:30,436 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:21:30,437 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:21:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:21:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:21:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:21:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:21:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:21:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:21:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:21:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:21:30,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:21:35,313 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:21:35,313 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:21:35,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:21:35 BoogieIcfgContainer [2020-10-28 19:21:35,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:21:35,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:21:35,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:21:35,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:21:35,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:21:27" (1/3) ... [2020-10-28 19:21:35,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70300363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:21:35, skipping insertion in model container [2020-10-28 19:21:35,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:21:30" (2/3) ... [2020-10-28 19:21:35,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70300363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:21:35, skipping insertion in model container [2020-10-28 19:21:35,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:21:35" (3/3) ... [2020-10-28 19:21:35,326 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 19:21:35,339 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:21:35,345 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:21:35,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:21:35,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:21:35,395 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:21:35,395 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:21:35,395 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:21:35,395 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:21:35,396 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:21:35,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:21:35,396 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:21:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states. [2020-10-28 19:21:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 19:21:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:35,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:35,476 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 244462510, now seen corresponding path program 1 times [2020-10-28 19:21:35,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:35,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635914153] [2020-10-28 19:21:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:36,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:37,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:38,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:39,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:39,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:41,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 19:21:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:21:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 19:21:41,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:41,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:21:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 19:21:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 19:21:43,324 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:21:43,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:43,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:43,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:43,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:21:43,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:43,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:43,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:43,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:21:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:21:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635914153] [2020-10-28 19:21:43,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:43,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171103569] [2020-10-28 19:21:43,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:43,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:43,633 INFO L87 Difference]: Start difference. First operand 977 states. Second operand 4 states. [2020-10-28 19:21:45,793 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 359 [2020-10-28 19:21:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:56,864 INFO L93 Difference]: Finished difference Result 1690 states and 3016 transitions. [2020-10-28 19:21:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:56,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-28 19:21:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:56,921 INFO L225 Difference]: With dead ends: 1690 [2020-10-28 19:21:56,922 INFO L226 Difference]: Without dead ends: 1387 [2020-10-28 19:21:56,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2020-10-28 19:21:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1384. [2020-10-28 19:21:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-10-28 19:21:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2143 transitions. [2020-10-28 19:21:57,123 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2143 transitions. Word has length 315 [2020-10-28 19:21:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:57,124 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2143 transitions. [2020-10-28 19:21:57,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2143 transitions. [2020-10-28 19:21:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 19:21:57,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:57,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:21:57,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:21:57,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1127180094, now seen corresponding path program 1 times [2020-10-28 19:21:57,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119845779] [2020-10-28 19:21:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:57,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:57,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:58,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:58,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:58,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:58,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:01,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:02,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:02,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 19:22:02,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:22:02,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 19:22:02,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-28 19:22:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:22:04,239 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:04,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:04,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:04,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:04,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:04,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:04,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:22:04,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:04,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:04,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:04,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:04,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119845779] [2020-10-28 19:22:04,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:04,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:22:04,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405215240] [2020-10-28 19:22:04,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:22:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:22:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:22:04,486 INFO L87 Difference]: Start difference. First operand 1384 states and 2143 transitions. Second operand 4 states. [2020-10-28 19:22:06,654 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 359 [2020-10-28 19:22:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:16,165 INFO L93 Difference]: Finished difference Result 2675 states and 4185 transitions. [2020-10-28 19:22:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:22:16,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 315 [2020-10-28 19:22:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:16,190 INFO L225 Difference]: With dead ends: 2675 [2020-10-28 19:22:16,190 INFO L226 Difference]: Without dead ends: 2323 [2020-10-28 19:22:16,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2020-10-28 19:22:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2320. [2020-10-28 19:22:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2020-10-28 19:22:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3607 transitions. [2020-10-28 19:22:16,303 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3607 transitions. Word has length 315 [2020-10-28 19:22:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:16,305 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 3607 transitions. [2020-10-28 19:22:16,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:22:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3607 transitions. [2020-10-28 19:22:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-28 19:22:16,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:16,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:16,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:22:16,330 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1137677159, now seen corresponding path program 1 times [2020-10-28 19:22:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:16,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980380226] [2020-10-28 19:22:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:16,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:17,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:17,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:19,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:20,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:21,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:21,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 19:22:21,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:22:21,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:22:21,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:21,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 19:22:21,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:23,733 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:23,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:23,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:23,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:23,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:23,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:22:23,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:23,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:23,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:23,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:23,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:23,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:24,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980380226] [2020-10-28 19:22:24,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:24,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:24,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525005850] [2020-10-28 19:22:24,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:24,038 INFO L87 Difference]: Start difference. First operand 2320 states and 3607 transitions. Second operand 5 states. [2020-10-28 19:22:36,176 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 19:22:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:39,680 INFO L93 Difference]: Finished difference Result 6852 states and 10636 transitions. [2020-10-28 19:22:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:39,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2020-10-28 19:22:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:39,705 INFO L225 Difference]: With dead ends: 6852 [2020-10-28 19:22:39,705 INFO L226 Difference]: Without dead ends: 4549 [2020-10-28 19:22:39,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4549 states. [2020-10-28 19:22:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4549 to 4448. [2020-10-28 19:22:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4448 states. [2020-10-28 19:22:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 6879 transitions. [2020-10-28 19:22:39,897 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 6879 transitions. Word has length 315 [2020-10-28 19:22:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:39,897 INFO L481 AbstractCegarLoop]: Abstraction has 4448 states and 6879 transitions. [2020-10-28 19:22:39,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 6879 transitions. [2020-10-28 19:22:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 19:22:39,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:39,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:22:39,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:22:39,910 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash 317793027, now seen corresponding path program 1 times [2020-10-28 19:22:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:39,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189178312] [2020-10-28 19:22:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:40,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:43,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:43,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:44,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:45,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:45,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:45,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-28 19:22:45,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:47,247 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:22:47,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:47,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:47,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:47,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:47,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:22:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189178312] [2020-10-28 19:22:47,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:47,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:47,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073244765] [2020-10-28 19:22:47,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:47,457 INFO L87 Difference]: Start difference. First operand 4448 states and 6879 transitions. Second operand 5 states. [2020-10-28 19:23:00,099 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 19:23:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:03,714 INFO L93 Difference]: Finished difference Result 13186 states and 20372 transitions. [2020-10-28 19:23:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:03,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-10-28 19:23:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:03,757 INFO L225 Difference]: With dead ends: 13186 [2020-10-28 19:23:03,757 INFO L226 Difference]: Without dead ends: 8753 [2020-10-28 19:23:03,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2020-10-28 19:23:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 8584. [2020-10-28 19:23:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8584 states. [2020-10-28 19:23:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 13210 transitions. [2020-10-28 19:23:04,132 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 13210 transitions. Word has length 317 [2020-10-28 19:23:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:04,132 INFO L481 AbstractCegarLoop]: Abstraction has 8584 states and 13210 transitions. [2020-10-28 19:23:04,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 13210 transitions. [2020-10-28 19:23:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:23:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:04,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:04,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:23:04,155 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1698194294, now seen corresponding path program 1 times [2020-10-28 19:23:04,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:04,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081993653] [2020-10-28 19:23:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:04,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:06,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:09,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:09,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:23:09,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:23:09,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:23:09,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:09,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:23:09,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 19:23:09,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:11,351 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:23:11,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:11,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:11,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081993653] [2020-10-28 19:23:11,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:11,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:23:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118304916] [2020-10-28 19:23:11,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:23:11,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:23:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:23:11,597 INFO L87 Difference]: Start difference. First operand 8584 states and 13210 transitions. Second operand 4 states. [2020-10-28 19:23:26,148 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 363 [2020-10-28 19:23:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:29,780 INFO L93 Difference]: Finished difference Result 25118 states and 38550 transitions. [2020-10-28 19:23:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:23:29,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 19:23:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:29,839 INFO L225 Difference]: With dead ends: 25118 [2020-10-28 19:23:29,839 INFO L226 Difference]: Without dead ends: 16793 [2020-10-28 19:23:29,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16793 states. [2020-10-28 19:23:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16793 to 16632. [2020-10-28 19:23:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16632 states. [2020-10-28 19:23:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16632 states to 16632 states and 25438 transitions. [2020-10-28 19:23:30,488 INFO L78 Accepts]: Start accepts. Automaton has 16632 states and 25438 transitions. Word has length 319 [2020-10-28 19:23:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:30,488 INFO L481 AbstractCegarLoop]: Abstraction has 16632 states and 25438 transitions. [2020-10-28 19:23:30,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:23:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 16632 states and 25438 transitions. [2020-10-28 19:23:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:23:30,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:30,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:30,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:23:30,521 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash -260679835, now seen corresponding path program 1 times [2020-10-28 19:23:30,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:30,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561592296] [2020-10-28 19:23:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:30,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:31,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:34,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:35,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:23:35,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:23:35,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 19:23:35,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:35,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:35,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 19:23:35,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:37,855 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:23:37,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:37,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:37,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:38,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561592296] [2020-10-28 19:23:38,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:38,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:38,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716690235] [2020-10-28 19:23:38,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:38,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:38,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:38,060 INFO L87 Difference]: Start difference. First operand 16632 states and 25438 transitions. Second operand 5 states. [2020-10-28 19:23:51,730 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 19:23:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:55,787 INFO L93 Difference]: Finished difference Result 48923 states and 74641 transitions. [2020-10-28 19:23:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:55,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-28 19:23:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:55,863 INFO L225 Difference]: With dead ends: 48923 [2020-10-28 19:23:55,863 INFO L226 Difference]: Without dead ends: 32554 [2020-10-28 19:23:55,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32554 states. [2020-10-28 19:23:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32554 to 32341. [2020-10-28 19:23:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32341 states. [2020-10-28 19:23:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32341 states to 32341 states and 49145 transitions. [2020-10-28 19:23:57,254 INFO L78 Accepts]: Start accepts. Automaton has 32341 states and 49145 transitions. Word has length 319 [2020-10-28 19:23:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:57,254 INFO L481 AbstractCegarLoop]: Abstraction has 32341 states and 49145 transitions. [2020-10-28 19:23:57,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32341 states and 49145 transitions. [2020-10-28 19:23:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 19:23:57,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:57,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:57,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:23:57,303 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -753720129, now seen corresponding path program 1 times [2020-10-28 19:23:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:57,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790744860] [2020-10-28 19:23:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:58,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:02,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:02,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 19:24:02,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:02,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:24:02,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:02,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-28 19:24:02,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:04,608 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:24:04,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:04,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:04,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:04,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:04,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:04,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790744860] [2020-10-28 19:24:04,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:04,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:04,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026302102] [2020-10-28 19:24:04,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:04,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:04,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:04,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:04,792 INFO L87 Difference]: Start difference. First operand 32341 states and 49145 transitions. Second operand 5 states. [2020-10-28 19:24:18,924 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 19:24:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:23,456 INFO L93 Difference]: Finished difference Result 94921 states and 143847 transitions. [2020-10-28 19:24:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:23,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-28 19:24:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:23,556 INFO L225 Difference]: With dead ends: 94921 [2020-10-28 19:24:23,557 INFO L226 Difference]: Without dead ends: 63056 [2020-10-28 19:24:23,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63056 states. [2020-10-28 19:24:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63056 to 62843. [2020-10-28 19:24:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62843 states. [2020-10-28 19:24:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62843 states to 62843 states and 94729 transitions. [2020-10-28 19:24:26,859 INFO L78 Accepts]: Start accepts. Automaton has 62843 states and 94729 transitions. Word has length 321 [2020-10-28 19:24:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:26,860 INFO L481 AbstractCegarLoop]: Abstraction has 62843 states and 94729 transitions. [2020-10-28 19:24:26,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:24:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 62843 states and 94729 transitions. [2020-10-28 19:24:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 19:24:26,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:26,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:26,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:24:26,933 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1297461476, now seen corresponding path program 1 times [2020-10-28 19:24:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:26,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354600975] [2020-10-28 19:24:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:27,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:29,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:29,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:30,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:32,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-28 19:24:32,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:34,245 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 19:24:34,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:34,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:34,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:34,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:24:34,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:34,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:34,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354600975] [2020-10-28 19:24:34,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:34,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:24:34,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826904488] [2020-10-28 19:24:34,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:24:34,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:24:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:34,432 INFO L87 Difference]: Start difference. First operand 62843 states and 94729 transitions. Second operand 5 states. [2020-10-28 19:24:50,171 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 364 [2020-10-28 19:24:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:55,347 INFO L93 Difference]: Finished difference Result 184831 states and 277880 transitions. [2020-10-28 19:24:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:24:55,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-28 19:24:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:55,732 INFO L225 Difference]: With dead ends: 184831 [2020-10-28 19:24:55,733 INFO L226 Difference]: Without dead ends: 122452 [2020-10-28 19:24:55,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:24:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122452 states. [2020-10-28 19:25:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122452 to 122383. [2020-10-28 19:25:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122383 states. [2020-10-28 19:25:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122383 states to 122383 states and 182692 transitions. [2020-10-28 19:25:02,014 INFO L78 Accepts]: Start accepts. Automaton has 122383 states and 182692 transitions. Word has length 323 [2020-10-28 19:25:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:02,014 INFO L481 AbstractCegarLoop]: Abstraction has 122383 states and 182692 transitions. [2020-10-28 19:25:02,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 122383 states and 182692 transitions. [2020-10-28 19:25:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:25:02,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:02,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:02,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:25:02,312 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1909745011, now seen corresponding path program 1 times [2020-10-28 19:25:02,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:02,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173177852] [2020-10-28 19:25:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:25:07,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:25:07,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 19:25:07,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:07,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 19:25:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0