/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:05:49,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:05:49,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:05:49,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:05:49,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:05:49,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:05:49,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:05:49,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:05:49,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:05:49,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:05:49,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:05:49,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:05:49,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:05:49,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:05:49,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:05:49,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:05:49,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:05:49,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:05:49,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:05:49,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:05:49,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:05:49,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:05:49,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:05:49,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:05:49,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:05:49,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:05:49,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:05:49,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:05:49,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:05:49,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:05:49,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:05:49,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:05:49,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:05:49,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:05:49,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:05:49,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:05:49,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:05:49,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:05:49,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:05:49,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:05:49,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:05:49,541 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 [2020-10-29 13:05:49,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:05:49,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:05:49,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:05:49,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:05:49,595 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:05:49,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:05:49,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:05:49,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:05:49,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:05:49,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:05:49,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:05:49,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:05:49,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:05:49,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:05:49,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:05:49,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:05:49,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:05:49,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:05:49,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:05:49,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:05:49,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:05:49,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:05:49,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:05:49,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:05:49,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:05:49,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:05:49,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:05:49,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:05:49,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:05:49,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:05:50,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:05:50,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:05:50,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:05:50,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:05:50,068 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:05:50,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:05:50,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89d9f64b3/8234d83f03ec4bd3879e1d30a5a710e7/FLAG6dbdde34e [2020-10-29 13:05:50,896 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:05:50,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:05:50,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89d9f64b3/8234d83f03ec4bd3879e1d30a5a710e7/FLAG6dbdde34e [2020-10-29 13:05:51,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89d9f64b3/8234d83f03ec4bd3879e1d30a5a710e7 [2020-10-29 13:05:51,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:05:51,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:05:51,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:51,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:05:51,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:05:51,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:51" (1/1) ... [2020-10-29 13:05:51,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b2b99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:51, skipping insertion in model container [2020-10-29 13:05:51,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:51" (1/1) ... [2020-10-29 13:05:51,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:05:51,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:05:51,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:51,758 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:05:51,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:52,054 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:05:52,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52 WrapperNode [2020-10-29 13:05:52,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:52,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:05:52,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:05:52,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:05:52,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (1/1) ... [2020-10-29 13:05:52,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:05:52,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:05:52,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:05:52,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:05:52,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (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 [2020-10-29 13:05:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:05:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:05:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:05:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:05:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:05:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:05:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:05:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:05:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:05:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:05:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:05:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:05:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:05:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:05:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:05:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:05:52,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:05:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:05:52,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:05:53,889 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:05:53,890 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:05:53,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:53 BoogieIcfgContainer [2020-10-29 13:05:53,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:05:53,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:05:53,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:05:53,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:05:53,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:05:51" (1/3) ... [2020-10-29 13:05:53,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc71185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:53, skipping insertion in model container [2020-10-29 13:05:53,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:52" (2/3) ... [2020-10-29 13:05:53,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc71185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:53, skipping insertion in model container [2020-10-29 13:05:53,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:53" (3/3) ... [2020-10-29 13:05:53,902 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-29 13:05:53,914 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:05:53,920 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:05:53,934 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:05:53,965 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:05:53,966 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:05:53,966 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:05:53,966 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:05:53,966 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:05:53,966 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:05:53,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:05:53,967 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:05:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states. [2020-10-29 13:05:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-29 13:05:54,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:54,011 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] [2020-10-29 13:05:54,012 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash -655812944, now seen corresponding path program 1 times [2020-10-29 13:05:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907570292] [2020-10-29 13:05:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:56,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:59,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-29 13:05:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:05:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:05:59,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:59,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:05:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-29 13:05:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 13:05:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:06:00,297 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:00,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:00,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:00,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:00,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:00,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:06:00,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:00,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:06:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:00,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907570292] [2020-10-29 13:06:00,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:00,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:06:00,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937075448] [2020-10-29 13:06:00,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:06:00,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:06:00,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:06:00,450 INFO L87 Difference]: Start difference. First operand 335 states. Second operand 4 states. [2020-10-29 13:06:01,089 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-29 13:06:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:03,490 INFO L93 Difference]: Finished difference Result 602 states and 1036 transitions. [2020-10-29 13:06:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:06:03,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-10-29 13:06:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:03,519 INFO L225 Difference]: With dead ends: 602 [2020-10-29 13:06:03,520 INFO L226 Difference]: Without dead ends: 452 [2020-10-29 13:06:03,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-29 13:06:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 448. [2020-10-29 13:06:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-29 13:06:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 739 transitions. [2020-10-29 13:06:03,612 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 739 transitions. Word has length 115 [2020-10-29 13:06:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:03,613 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 739 transitions. [2020-10-29 13:06:03,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:06:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 739 transitions. [2020-10-29 13:06:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-29 13:06:03,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:03,619 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] [2020-10-29 13:06:03,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:06:03,620 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash 148684735, now seen corresponding path program 1 times [2020-10-29 13:06:03,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:03,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087493219] [2020-10-29 13:06:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:03,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:04,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:04,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:07,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:08,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:08,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 13:06:08,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:06:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 13:06:08,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:08,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:08,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 13:06:08,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:06:09,432 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:09,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:09,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:09,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:06:09,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:09,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:09,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:09,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:09,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:09,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087493219] [2020-10-29 13:06:09,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:09,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861898518] [2020-10-29 13:06:09,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:09,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:09,547 INFO L87 Difference]: Start difference. First operand 448 states and 739 transitions. Second operand 5 states. [2020-10-29 13:06:12,392 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:06:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:12,510 INFO L93 Difference]: Finished difference Result 1307 states and 2160 transitions. [2020-10-29 13:06:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:12,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-29 13:06:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:12,527 INFO L225 Difference]: With dead ends: 1307 [2020-10-29 13:06:12,527 INFO L226 Difference]: Without dead ends: 872 [2020-10-29 13:06:12,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2020-10-29 13:06:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 869. [2020-10-29 13:06:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 869 states. [2020-10-29 13:06:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1428 transitions. [2020-10-29 13:06:12,644 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1428 transitions. Word has length 118 [2020-10-29 13:06:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:12,645 INFO L481 AbstractCegarLoop]: Abstraction has 869 states and 1428 transitions. [2020-10-29 13:06:12,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1428 transitions. [2020-10-29 13:06:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 13:06:12,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:12,651 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] [2020-10-29 13:06:12,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:06:12,651 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1681496823, now seen corresponding path program 1 times [2020-10-29 13:06:12,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:12,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47477981] [2020-10-29 13:06:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:12,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:13,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:17,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:17,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-29 13:06:17,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:06:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 13:06:17,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:06:18,550 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:18,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:18,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:18,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:18,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:18,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47477981] [2020-10-29 13:06:18,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:18,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416316511] [2020-10-29 13:06:18,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:18,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:18,669 INFO L87 Difference]: Start difference. First operand 869 states and 1428 transitions. Second operand 5 states. [2020-10-29 13:06:21,661 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:06:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:21,790 INFO L93 Difference]: Finished difference Result 2461 states and 4035 transitions. [2020-10-29 13:06:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:21,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-29 13:06:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:21,805 INFO L225 Difference]: With dead ends: 2461 [2020-10-29 13:06:21,805 INFO L226 Difference]: Without dead ends: 1664 [2020-10-29 13:06:21,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-10-29 13:06:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1661. [2020-10-29 13:06:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-10-29 13:06:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2710 transitions. [2020-10-29 13:06:21,916 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2710 transitions. Word has length 120 [2020-10-29 13:06:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 1661 states and 2710 transitions. [2020-10-29 13:06:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2710 transitions. [2020-10-29 13:06:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 13:06:21,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:21,929 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] [2020-10-29 13:06:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:06:21,930 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2049975536, now seen corresponding path program 1 times [2020-10-29 13:06:21,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:21,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831323717] [2020-10-29 13:06:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:27,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 13:06:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:27,767 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:27,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:27,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:27,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:27,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:27,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:06:27,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:27,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:27,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:27,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:27,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831323717] [2020-10-29 13:06:27,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:27,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:27,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056387343] [2020-10-29 13:06:27,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:27,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:27,901 INFO L87 Difference]: Start difference. First operand 1661 states and 2710 transitions. Second operand 5 states. [2020-10-29 13:06:31,108 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:06:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:31,264 INFO L93 Difference]: Finished difference Result 4765 states and 7760 transitions. [2020-10-29 13:06:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:31,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-29 13:06:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:31,283 INFO L225 Difference]: With dead ends: 4765 [2020-10-29 13:06:31,283 INFO L226 Difference]: Without dead ends: 3260 [2020-10-29 13:06:31,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-10-29 13:06:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3257. [2020-10-29 13:06:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3257 states. [2020-10-29 13:06:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 5288 transitions. [2020-10-29 13:06:31,547 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 5288 transitions. Word has length 120 [2020-10-29 13:06:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:31,548 INFO L481 AbstractCegarLoop]: Abstraction has 3257 states and 5288 transitions. [2020-10-29 13:06:31,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 5288 transitions. [2020-10-29 13:06:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-29 13:06:31,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:31,556 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] [2020-10-29 13:06:31,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:06:31,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1003467604, now seen corresponding path program 1 times [2020-10-29 13:06:31,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:31,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236353339] [2020-10-29 13:06:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:31,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:32,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:36,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 13:06:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:06:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-29 13:06:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:36,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 13:06:36,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:06:37,386 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:37,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:37,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:06:37,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:37,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:37,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236353339] [2020-10-29 13:06:37,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:37,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857674898] [2020-10-29 13:06:37,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:37,497 INFO L87 Difference]: Start difference. First operand 3257 states and 5288 transitions. Second operand 5 states. [2020-10-29 13:06:40,772 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:06:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:40,949 INFO L93 Difference]: Finished difference Result 9467 states and 15352 transitions. [2020-10-29 13:06:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:40,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-29 13:06:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:40,983 INFO L225 Difference]: With dead ends: 9467 [2020-10-29 13:06:40,984 INFO L226 Difference]: Without dead ends: 6336 [2020-10-29 13:06:40,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2020-10-29 13:06:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 6333. [2020-10-29 13:06:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6333 states. [2020-10-29 13:06:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 10214 transitions. [2020-10-29 13:06:41,445 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 10214 transitions. Word has length 121 [2020-10-29 13:06:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:41,446 INFO L481 AbstractCegarLoop]: Abstraction has 6333 states and 10214 transitions. [2020-10-29 13:06:41,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:41,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 10214 transitions. [2020-10-29 13:06:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-29 13:06:41,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:41,460 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] [2020-10-29 13:06:41,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:06:41,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash 278376238, now seen corresponding path program 1 times [2020-10-29 13:06:41,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:41,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193699937] [2020-10-29 13:06:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:43,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:46,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:46,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 13:06:46,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 13:06:46,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:47,356 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:47,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:47,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:47,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:47,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:47,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193699937] [2020-10-29 13:06:47,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:47,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139327884] [2020-10-29 13:06:47,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:47,455 INFO L87 Difference]: Start difference. First operand 6333 states and 10214 transitions. Second operand 5 states. [2020-10-29 13:06:51,013 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:06:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:51,290 INFO L93 Difference]: Finished difference Result 18260 states and 29380 transitions. [2020-10-29 13:06:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:51,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-29 13:06:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:51,356 INFO L225 Difference]: With dead ends: 18260 [2020-10-29 13:06:51,356 INFO L226 Difference]: Without dead ends: 12453 [2020-10-29 13:06:51,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12453 states. [2020-10-29 13:06:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12453 to 12450. [2020-10-29 13:06:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12450 states. [2020-10-29 13:06:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12450 states to 12450 states and 19960 transitions. [2020-10-29 13:06:52,480 INFO L78 Accepts]: Start accepts. Automaton has 12450 states and 19960 transitions. Word has length 122 [2020-10-29 13:06:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:52,481 INFO L481 AbstractCegarLoop]: Abstraction has 12450 states and 19960 transitions. [2020-10-29 13:06:52,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 12450 states and 19960 transitions. [2020-10-29 13:06:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-29 13:06:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:52,505 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] [2020-10-29 13:06:52,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:06:52,506 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:52,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1995243197, now seen corresponding path program 1 times [2020-10-29 13:06:52,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:52,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118422465] [2020-10-29 13:06:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:52,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:52,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:57,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:57,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 13:06:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:58,274 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:06:58,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:58,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:58,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:58,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:58,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:58,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118422465] [2020-10-29 13:06:58,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:58,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362936511] [2020-10-29 13:06:58,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:58,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:58,348 INFO L87 Difference]: Start difference. First operand 12450 states and 19960 transitions. Second operand 5 states. [2020-10-29 13:07:02,766 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:07:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:03,401 INFO L93 Difference]: Finished difference Result 36096 states and 57868 transitions. [2020-10-29 13:07:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:07:03,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-29 13:07:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:03,570 INFO L225 Difference]: With dead ends: 36096 [2020-10-29 13:07:03,570 INFO L226 Difference]: Without dead ends: 24237 [2020-10-29 13:07:03,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:07:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24237 states. [2020-10-29 13:07:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24237 to 24234. [2020-10-29 13:07:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24234 states. [2020-10-29 13:07:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24234 states to 24234 states and 38696 transitions. [2020-10-29 13:07:05,539 INFO L78 Accepts]: Start accepts. Automaton has 24234 states and 38696 transitions. Word has length 122 [2020-10-29 13:07:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:05,539 INFO L481 AbstractCegarLoop]: Abstraction has 24234 states and 38696 transitions. [2020-10-29 13:07:05,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:07:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24234 states and 38696 transitions. [2020-10-29 13:07:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 13:07:05,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:05,590 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] [2020-10-29 13:07:05,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:07:05,590 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1991864256, now seen corresponding path program 1 times [2020-10-29 13:07:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:05,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834297468] [2020-10-29 13:07:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:05,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:05,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:05,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:07,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:10,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 13:07:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:11,499 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:07:11,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:11,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:11,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:11,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:11,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:11,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:07:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:11,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834297468] [2020-10-29 13:07:11,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:11,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:07:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699434828] [2020-10-29 13:07:11,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:07:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:07:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:07:11,618 INFO L87 Difference]: Start difference. First operand 24234 states and 38696 transitions. Second operand 8 states. [2020-10-29 13:07:12,421 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:07:17,558 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 285 [2020-10-29 13:07:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:20,061 INFO L93 Difference]: Finished difference Result 53692 states and 87040 transitions. [2020-10-29 13:07:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:07:20,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-10-29 13:07:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:20,170 INFO L225 Difference]: With dead ends: 53692 [2020-10-29 13:07:20,170 INFO L226 Difference]: Without dead ends: 40605 [2020-10-29 13:07:20,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:07:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40605 states. [2020-10-29 13:07:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40605 to 24522. [2020-10-29 13:07:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24522 states. [2020-10-29 13:07:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 38888 transitions. [2020-10-29 13:07:22,990 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 38888 transitions. Word has length 123 [2020-10-29 13:07:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:22,991 INFO L481 AbstractCegarLoop]: Abstraction has 24522 states and 38888 transitions. [2020-10-29 13:07:22,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:07:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 38888 transitions. [2020-10-29 13:07:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 13:07:23,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:23,024 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] [2020-10-29 13:07:23,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:07:23,024 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1595896889, now seen corresponding path program 1 times [2020-10-29 13:07:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:23,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134239665] [2020-10-29 13:07:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:28,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 13:07:28,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:07:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:07:28,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:28,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:07:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:07:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 13:07:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:28,755 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:07:28,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:28,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:28,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:28,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:07:28,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:28,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:07:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:28,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134239665] [2020-10-29 13:07:28,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:28,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:07:28,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114832729] [2020-10-29 13:07:28,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:07:28,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:07:28,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:07:28,842 INFO L87 Difference]: Start difference. First operand 24522 states and 38888 transitions. Second operand 8 states. [2020-10-29 13:07:29,518 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:07:33,876 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 285 [2020-10-29 13:07:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:36,643 INFO L93 Difference]: Finished difference Result 46008 states and 74092 transitions. [2020-10-29 13:07:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:07:36,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-10-29 13:07:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:36,730 INFO L225 Difference]: With dead ends: 46008 [2020-10-29 13:07:36,731 INFO L226 Difference]: Without dead ends: 42181 [2020-10-29 13:07:36,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:07:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42181 states. [2020-10-29 13:07:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42181 to 24714. [2020-10-29 13:07:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24714 states. [2020-10-29 13:07:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24714 states to 24714 states and 39176 transitions. [2020-10-29 13:07:39,367 INFO L78 Accepts]: Start accepts. Automaton has 24714 states and 39176 transitions. Word has length 123 [2020-10-29 13:07:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:39,367 INFO L481 AbstractCegarLoop]: Abstraction has 24714 states and 39176 transitions. [2020-10-29 13:07:39,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:07:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24714 states and 39176 transitions. [2020-10-29 13:07:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 13:07:39,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:39,396 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] [2020-10-29 13:07:39,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:07:39,396 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1813720712, now seen corresponding path program 1 times [2020-10-29 13:07:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:39,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412195790] [2020-10-29 13:07:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:39,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:39,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:40,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:43,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:43,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 13:07:43,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:07:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3994 [2020-10-29 13:07:43,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:43,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:07:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-29 13:07:43,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:07:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:44,099 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:07:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:44,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:44,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:44,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:44,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:44,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:44,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412195790] [2020-10-29 13:07:44,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:44,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:07:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920435936] [2020-10-29 13:07:44,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:07:44,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:44,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:07:44,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:07:44,165 INFO L87 Difference]: Start difference. First operand 24714 states and 39176 transitions. Second operand 4 states. [2020-10-29 13:07:44,853 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-10-29 13:07:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:50,050 INFO L93 Difference]: Finished difference Result 52240 states and 83980 transitions. [2020-10-29 13:07:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:07:50,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-10-29 13:07:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:50,128 INFO L225 Difference]: With dead ends: 52240 [2020-10-29 13:07:50,128 INFO L226 Difference]: Without dead ends: 37933 [2020-10-29 13:07:50,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37933 states. [2020-10-29 13:07:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37933 to 37802. [2020-10-29 13:07:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37802 states. [2020-10-29 13:07:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37802 states to 37802 states and 60200 transitions. [2020-10-29 13:07:54,695 INFO L78 Accepts]: Start accepts. Automaton has 37802 states and 60200 transitions. Word has length 123 [2020-10-29 13:07:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:54,695 INFO L481 AbstractCegarLoop]: Abstraction has 37802 states and 60200 transitions. [2020-10-29 13:07:54,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:07:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37802 states and 60200 transitions. [2020-10-29 13:07:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-29 13:07:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:54,716 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] [2020-10-29 13:07:54,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:07:54,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1639607840, now seen corresponding path program 1 times [2020-10-29 13:07:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:54,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615388228] [2020-10-29 13:07:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:54,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:54,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:55,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:59,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 13:07:59,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:07:59,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-29 13:07:59,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:00,481 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:08:00,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:00,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:00,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:08:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615388228] [2020-10-29 13:08:00,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:00,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:08:00,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104581693] [2020-10-29 13:08:00,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:08:00,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:08:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:00,547 INFO L87 Difference]: Start difference. First operand 37802 states and 60200 transitions. Second operand 5 states. [2020-10-29 13:08:07,135 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:08:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:11,634 INFO L93 Difference]: Finished difference Result 109386 states and 173966 transitions. [2020-10-29 13:08:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:08:11,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-29 13:08:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:11,745 INFO L225 Difference]: With dead ends: 109386 [2020-10-29 13:08:11,745 INFO L226 Difference]: Without dead ends: 73735 [2020-10-29 13:08:11,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:08:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73735 states. [2020-10-29 13:08:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73735 to 73732. [2020-10-29 13:08:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73732 states. [2020-10-29 13:08:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73732 states to 73732 states and 116666 transitions. [2020-10-29 13:08:19,976 INFO L78 Accepts]: Start accepts. Automaton has 73732 states and 116666 transitions. Word has length 127 [2020-10-29 13:08:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:08:19,977 INFO L481 AbstractCegarLoop]: Abstraction has 73732 states and 116666 transitions. [2020-10-29 13:08:19,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:08:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 73732 states and 116666 transitions. [2020-10-29 13:08:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 13:08:20,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:08:20,051 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] [2020-10-29 13:08:20,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:08:20,051 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:08:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:08:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1723504990, now seen corresponding path program 1 times [2020-10-29 13:08:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:08:20,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761932139] [2020-10-29 13:08:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:08:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:20,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:20,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:20,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:25,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:08:25,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:08:25,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 13:08:25,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:25,862 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:08:25,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:25,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:25,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:08:25,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761932139] [2020-10-29 13:08:25,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:25,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:08:25,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337756604] [2020-10-29 13:08:25,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:08:25,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:08:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:25,943 INFO L87 Difference]: Start difference. First operand 73732 states and 116666 transitions. Second operand 5 states. [2020-10-29 13:08:35,751 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-29 13:08:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:44,829 INFO L93 Difference]: Finished difference Result 216009 states and 341532 transitions. [2020-10-29 13:08:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:08:44,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-29 13:08:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:45,101 INFO L225 Difference]: With dead ends: 216009 [2020-10-29 13:08:45,101 INFO L226 Difference]: Without dead ends: 144140 [2020-10-29 13:08:45,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:08:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144140 states. [2020-10-29 13:09:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144140 to 144137. [2020-10-29 13:09:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144137 states. [2020-10-29 13:09:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144137 states to 144137 states and 226554 transitions. [2020-10-29 13:09:01,945 INFO L78 Accepts]: Start accepts. Automaton has 144137 states and 226554 transitions. Word has length 129 [2020-10-29 13:09:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:09:01,946 INFO L481 AbstractCegarLoop]: Abstraction has 144137 states and 226554 transitions. [2020-10-29 13:09:01,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:09:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 144137 states and 226554 transitions. [2020-10-29 13:09:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-29 13:09:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:09:02,081 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] [2020-10-29 13:09:02,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:09:02,081 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:09:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:09:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash 562800151, now seen corresponding path program 1 times [2020-10-29 13:09:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:09:02,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872779636] [2020-10-29 13:09:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:09:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:02,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:02,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:05,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:07,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 13:09:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:08,178 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-10-29 13:09:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:09:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:09:08,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:09:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:09:08,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:09:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:09:08,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872779636] [2020-10-29 13:09:08,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:09:08,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:09:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762482608] [2020-10-29 13:09:08,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:09:08,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:09:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:09:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:09:08,247 INFO L87 Difference]: Start difference. First operand 144137 states and 226554 transitions. Second operand 5 states. [2020-10-29 13:09:25,140 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 283