/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:10:53,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:10:53,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:10:53,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:10:53,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:10:53,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:10:53,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:10:53,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:10:53,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:10:53,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:10:53,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:10:53,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:10:53,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:10:53,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:10:53,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:10:53,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:10:53,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:10:53,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:10:53,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:10:53,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:10:53,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:10:53,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:10:53,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:10:53,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:10:53,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:10:53,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:10:53,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:10:53,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:10:53,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:10:53,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:10:53,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:10:53,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:10:53,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:10:53,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:10:53,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:10:53,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:10:53,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:10:53,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:10:53,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:10:53,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:10:53,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:10:53,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:10:53,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:10:53,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:10:53,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:10:53,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:10:53,765 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:10:53,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:10:53,766 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:10:53,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:10:53,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:10:53,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:10:53,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:10:53,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:10:53,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:10:53,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:10:53,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:10:53,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:10:53,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:10:53,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:10:53,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:10:53,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:10:53,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:10:53,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:53,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:10:53,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:10:53,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:10:53,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:10:53,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:10:53,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:10:53,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:10:53,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:10:54,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:10:54,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:10:54,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:10:54,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:10:54,313 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:10:54,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:10:54,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04277da6/65beaa1beabf4c339d26bb5bcfa7d3fe/FLAG9d2cb55c9 [2020-10-28 18:10:55,205 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:10:55,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:10:55,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04277da6/65beaa1beabf4c339d26bb5bcfa7d3fe/FLAG9d2cb55c9 [2020-10-28 18:10:55,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04277da6/65beaa1beabf4c339d26bb5bcfa7d3fe [2020-10-28 18:10:55,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:10:55,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:10:55,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:55,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:10:55,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:10:55,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:55" (1/1) ... [2020-10-28 18:10:55,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bb571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:55, skipping insertion in model container [2020-10-28 18:10:55,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:10:55" (1/1) ... [2020-10-28 18:10:55,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:10:55,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:10:55,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:55,906 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:10:56,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:10:56,070 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:10:56,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56 WrapperNode [2020-10-28 18:10:56,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:10:56,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:10:56,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:10:56,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:10:56,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... [2020-10-28 18:10:56,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:10:56,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:10:56,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:10:56,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:10:56,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:10:56,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:10:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:10:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:10:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:10:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:10:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:10:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:10:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:10:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:10:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:10:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:10:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:10:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:10:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:10:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:10:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:10:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:10:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:10:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:10:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:10:56,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:10:56,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:10:56,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:10:56,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:10:56,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:10:56,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:10:56,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:10:57,141 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:10:57,141 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:10:57,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:57 BoogieIcfgContainer [2020-10-28 18:10:57,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:10:57,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:10:57,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:10:57,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:10:57,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:10:55" (1/3) ... [2020-10-28 18:10:57,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc6adbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:57, skipping insertion in model container [2020-10-28 18:10:57,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:10:56" (2/3) ... [2020-10-28 18:10:57,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc6adbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:10:57, skipping insertion in model container [2020-10-28 18:10:57,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:10:57" (3/3) ... [2020-10-28 18:10:57,160 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:10:57,173 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:10:57,178 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:10:57,194 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:10:57,222 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:10:57,222 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:10:57,222 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:10:57,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:10:57,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:10:57,223 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:10:57,223 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:10:57,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:10:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-10-28 18:10:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 18:10:57,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:10:57,254 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] [2020-10-28 18:10:57,255 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:10:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:10:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1717592954, now seen corresponding path program 1 times [2020-10-28 18:10:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:10:57,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525977134] [2020-10-28 18:10:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:10:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:10:57,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:10:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:00,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:00,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 18:11:00,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:11:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2902 [2020-10-28 18:11:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:00,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:11:00,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:11:00,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:11:00,985 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:01,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:01,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:01,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:01,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:11:01,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:01,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:01,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:01,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:01,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:01,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525977134] [2020-10-28 18:11:01,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:01,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:01,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639326707] [2020-10-28 18:11:01,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:01,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:01,078 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 4 states. [2020-10-28 18:11:01,437 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 18:11:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:02,267 INFO L93 Difference]: Finished difference Result 303 states and 510 transitions. [2020-10-28 18:11:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:02,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-28 18:11:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:02,292 INFO L225 Difference]: With dead ends: 303 [2020-10-28 18:11:02,293 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 18:11:02,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 18:11:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-28 18:11:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 18:11:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 326 transitions. [2020-10-28 18:11:02,393 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 326 transitions. Word has length 62 [2020-10-28 18:11:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:02,394 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 326 transitions. [2020-10-28 18:11:02,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 326 transitions. [2020-10-28 18:11:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:11:02,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:02,403 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] [2020-10-28 18:11:02,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:11:02,403 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash 588115693, now seen corresponding path program 1 times [2020-10-28 18:11:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:02,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933496792] [2020-10-28 18:11:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:02,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:02,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:03,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:07,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:11:07,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:11:07,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 18:11:07,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:07,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:11:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 18:11:07,936 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:07,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:07,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:07,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:07,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:07,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:07,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:07,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933496792] [2020-10-28 18:11:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535960573] [2020-10-28 18:11:07,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:07,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:07,994 INFO L87 Difference]: Start difference. First operand 206 states and 326 transitions. Second operand 5 states. [2020-10-28 18:11:09,156 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:09,236 INFO L93 Difference]: Finished difference Result 571 states and 904 transitions. [2020-10-28 18:11:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:09,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-28 18:11:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:09,240 INFO L225 Difference]: With dead ends: 571 [2020-10-28 18:11:09,241 INFO L226 Difference]: Without dead ends: 390 [2020-10-28 18:11:09,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-28 18:11:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 387. [2020-10-28 18:11:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-28 18:11:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 610 transitions. [2020-10-28 18:11:09,297 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 610 transitions. Word has length 64 [2020-10-28 18:11:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:09,297 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 610 transitions. [2020-10-28 18:11:09,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 610 transitions. [2020-10-28 18:11:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:11:09,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:09,304 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] [2020-10-28 18:11:09,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:11:09,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:09,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:09,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1795276626, now seen corresponding path program 1 times [2020-10-28 18:11:09,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:09,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902099252] [2020-10-28 18:11:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:09,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:09,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:14,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:14,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:11:14,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:14,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:11:14,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:14,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:14,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:14,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:11:14,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:14,761 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:14,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:14,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:14,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:14,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:14,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:14,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:11:14,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:14,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:14,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:14,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:14,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902099252] [2020-10-28 18:11:14,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:14,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677404817] [2020-10-28 18:11:14,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:14,826 INFO L87 Difference]: Start difference. First operand 387 states and 610 transitions. Second operand 5 states. [2020-10-28 18:11:15,914 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:16,066 INFO L93 Difference]: Finished difference Result 1095 states and 1724 transitions. [2020-10-28 18:11:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:16,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-28 18:11:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:16,074 INFO L225 Difference]: With dead ends: 1095 [2020-10-28 18:11:16,075 INFO L226 Difference]: Without dead ends: 733 [2020-10-28 18:11:16,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-10-28 18:11:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 730. [2020-10-28 18:11:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-10-28 18:11:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1142 transitions. [2020-10-28 18:11:16,148 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1142 transitions. Word has length 64 [2020-10-28 18:11:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:16,149 INFO L481 AbstractCegarLoop]: Abstraction has 730 states and 1142 transitions. [2020-10-28 18:11:16,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1142 transitions. [2020-10-28 18:11:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:11:16,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:16,156 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] [2020-10-28 18:11:16,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:11:16,157 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2047583584, now seen corresponding path program 1 times [2020-10-28 18:11:16,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:16,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163063498] [2020-10-28 18:11:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:16,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:16,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:16,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:16,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:16,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:21,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:21,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:11:21,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:11:21,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:21,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:21,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:21,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:21,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:11:21,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:21,664 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:21,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:21,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:21,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:21,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:21,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:11:21,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:21,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:21,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:21,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163063498] [2020-10-28 18:11:21,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:21,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968772778] [2020-10-28 18:11:21,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:21,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:21,736 INFO L87 Difference]: Start difference. First operand 730 states and 1142 transitions. Second operand 5 states. [2020-10-28 18:11:22,860 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:23,036 INFO L93 Difference]: Finished difference Result 2008 states and 3179 transitions. [2020-10-28 18:11:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:23,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-28 18:11:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:23,045 INFO L225 Difference]: With dead ends: 2008 [2020-10-28 18:11:23,045 INFO L226 Difference]: Without dead ends: 1392 [2020-10-28 18:11:23,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-10-28 18:11:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1389. [2020-10-28 18:11:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2020-10-28 18:11:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2165 transitions. [2020-10-28 18:11:23,195 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2165 transitions. Word has length 65 [2020-10-28 18:11:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:23,196 INFO L481 AbstractCegarLoop]: Abstraction has 1389 states and 2165 transitions. [2020-10-28 18:11:23,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2165 transitions. [2020-10-28 18:11:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:11:23,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:23,202 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] [2020-10-28 18:11:23,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:11:23,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1117968351, now seen corresponding path program 1 times [2020-10-28 18:11:23,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:23,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620000813] [2020-10-28 18:11:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:24,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:26,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:26,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:11:26,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3107 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:11:26,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:26,814 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:26,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:26,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:26,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:26,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:26,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:11:26,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:26,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:26,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:26,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:26,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:26,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620000813] [2020-10-28 18:11:26,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:26,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913788034] [2020-10-28 18:11:26,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:26,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:26,878 INFO L87 Difference]: Start difference. First operand 1389 states and 2165 transitions. Second operand 5 states. [2020-10-28 18:11:28,167 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:28,397 INFO L93 Difference]: Finished difference Result 3678 states and 5859 transitions. [2020-10-28 18:11:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:28,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-28 18:11:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:28,413 INFO L225 Difference]: With dead ends: 3678 [2020-10-28 18:11:28,413 INFO L226 Difference]: Without dead ends: 2627 [2020-10-28 18:11:28,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2020-10-28 18:11:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2624. [2020-10-28 18:11:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2020-10-28 18:11:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 4055 transitions. [2020-10-28 18:11:28,702 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 4055 transitions. Word has length 65 [2020-10-28 18:11:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:28,704 INFO L481 AbstractCegarLoop]: Abstraction has 2624 states and 4055 transitions. [2020-10-28 18:11:28,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 4055 transitions. [2020-10-28 18:11:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:11:28,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:28,709 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] [2020-10-28 18:11:28,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:11:28,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1398983539, now seen corresponding path program 1 times [2020-10-28 18:11:28,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:28,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307813693] [2020-10-28 18:11:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:28,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:29,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:30,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:32,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:32,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:11:32,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:32,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4234 [2020-10-28 18:11:32,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:32,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:11:32,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:11:32,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:33,315 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:33,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:33,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:33,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:11:33,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:33,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:33,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:33,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:11:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:33,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307813693] [2020-10-28 18:11:33,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:33,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846249473] [2020-10-28 18:11:33,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:33,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:33,374 INFO L87 Difference]: Start difference. First operand 2624 states and 4055 transitions. Second operand 4 states. [2020-10-28 18:11:33,844 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 18:11:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:34,822 INFO L93 Difference]: Finished difference Result 6454 states and 10443 transitions. [2020-10-28 18:11:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:34,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-28 18:11:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:34,847 INFO L225 Difference]: With dead ends: 6454 [2020-10-28 18:11:34,848 INFO L226 Difference]: Without dead ends: 4435 [2020-10-28 18:11:34,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2020-10-28 18:11:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4432. [2020-10-28 18:11:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4432 states. [2020-10-28 18:11:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 7031 transitions. [2020-10-28 18:11:35,321 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 7031 transitions. Word has length 66 [2020-10-28 18:11:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:35,322 INFO L481 AbstractCegarLoop]: Abstraction has 4432 states and 7031 transitions. [2020-10-28 18:11:35,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:11:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 7031 transitions. [2020-10-28 18:11:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:11:35,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:35,328 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] [2020-10-28 18:11:35,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:11:35,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash -645169434, now seen corresponding path program 1 times [2020-10-28 18:11:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:35,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580721077] [2020-10-28 18:11:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:35,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:35,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:35,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:35,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:35,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:37,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2448 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:37,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:37,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:11:37,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:38,143 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:38,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:38,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:38,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580721077] [2020-10-28 18:11:38,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:38,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361596237] [2020-10-28 18:11:38,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:38,186 INFO L87 Difference]: Start difference. First operand 4432 states and 7031 transitions. Second operand 5 states. [2020-10-28 18:11:39,559 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:39,972 INFO L93 Difference]: Finished difference Result 12634 states and 20152 transitions. [2020-10-28 18:11:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:39,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:11:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:40,022 INFO L225 Difference]: With dead ends: 12634 [2020-10-28 18:11:40,022 INFO L226 Difference]: Without dead ends: 8482 [2020-10-28 18:11:40,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2020-10-28 18:11:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 8479. [2020-10-28 18:11:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8479 states. [2020-10-28 18:11:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8479 states to 8479 states and 13319 transitions. [2020-10-28 18:11:40,884 INFO L78 Accepts]: Start accepts. Automaton has 8479 states and 13319 transitions. Word has length 68 [2020-10-28 18:11:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:40,884 INFO L481 AbstractCegarLoop]: Abstraction has 8479 states and 13319 transitions. [2020-10-28 18:11:40,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8479 states and 13319 transitions. [2020-10-28 18:11:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:11:40,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:40,894 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] [2020-10-28 18:11:40,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:11:40,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1913244282, now seen corresponding path program 1 times [2020-10-28 18:11:40,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:40,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277887206] [2020-10-28 18:11:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:40,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:40,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:11:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:11:45,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:11:45,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:46,350 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:46,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:46,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:11:46,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:46,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:46,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277887206] [2020-10-28 18:11:46,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:46,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:11:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560995612] [2020-10-28 18:11:46,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:11:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:11:46,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:46,402 INFO L87 Difference]: Start difference. First operand 8479 states and 13319 transitions. Second operand 5 states. [2020-10-28 18:11:48,122 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:11:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:48,926 INFO L93 Difference]: Finished difference Result 23912 states and 37994 transitions. [2020-10-28 18:11:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:11:48,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-28 18:11:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:49,000 INFO L225 Difference]: With dead ends: 23912 [2020-10-28 18:11:49,000 INFO L226 Difference]: Without dead ends: 16349 [2020-10-28 18:11:49,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:11:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16349 states. [2020-10-28 18:11:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16349 to 16346. [2020-10-28 18:11:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16346 states. [2020-10-28 18:11:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16346 states to 16346 states and 25494 transitions. [2020-10-28 18:11:50,644 INFO L78 Accepts]: Start accepts. Automaton has 16346 states and 25494 transitions. Word has length 68 [2020-10-28 18:11:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:11:50,644 INFO L481 AbstractCegarLoop]: Abstraction has 16346 states and 25494 transitions. [2020-10-28 18:11:50,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:11:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16346 states and 25494 transitions. [2020-10-28 18:11:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:11:50,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:11:50,665 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] [2020-10-28 18:11:50,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:11:50,666 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:11:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:11:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -443689739, now seen corresponding path program 1 times [2020-10-28 18:11:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:11:50,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411132069] [2020-10-28 18:11:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:11:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:50,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:50,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:50,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:55,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:11:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 18:11:55,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:11:55,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:56,020 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:11:56,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:11:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:11:56,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:11:56,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:11:56,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:11:56,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:11:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:11:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:11:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:11:56,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411132069] [2020-10-28 18:11:56,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:11:56,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:11:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249327701] [2020-10-28 18:11:56,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:11:56,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:11:56,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:11:56,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:11:56,060 INFO L87 Difference]: Start difference. First operand 16346 states and 25494 transitions. Second operand 4 states. [2020-10-28 18:11:56,383 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 18:11:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:11:59,179 INFO L93 Difference]: Finished difference Result 40928 states and 65690 transitions. [2020-10-28 18:11:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:11:59,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:11:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:11:59,265 INFO L225 Difference]: With dead ends: 40928 [2020-10-28 18:11:59,266 INFO L226 Difference]: Without dead ends: 26845 [2020-10-28 18:11:59,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:11:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26845 states. [2020-10-28 18:12:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26845 to 26842. [2020-10-28 18:12:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26842 states. [2020-10-28 18:12:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26842 states to 26842 states and 41366 transitions. [2020-10-28 18:12:01,844 INFO L78 Accepts]: Start accepts. Automaton has 26842 states and 41366 transitions. Word has length 69 [2020-10-28 18:12:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:01,844 INFO L481 AbstractCegarLoop]: Abstraction has 26842 states and 41366 transitions. [2020-10-28 18:12:01,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26842 states and 41366 transitions. [2020-10-28 18:12:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:12:01,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:01,883 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] [2020-10-28 18:12:01,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:12:01,884 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:01,884 INFO L82 PathProgramCache]: Analyzing trace with hash 953961540, now seen corresponding path program 1 times [2020-10-28 18:12:01,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:01,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698869468] [2020-10-28 18:12:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:01,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:01,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:02,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:02,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:03,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:06,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:12:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:12:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:07,322 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:07,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:07,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:07,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:07,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:07,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:12:07,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:07,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:07,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:07,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698869468] [2020-10-28 18:12:07,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:07,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875165721] [2020-10-28 18:12:07,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:07,363 INFO L87 Difference]: Start difference. First operand 26842 states and 41366 transitions. Second operand 5 states. [2020-10-28 18:12:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:09,527 INFO L93 Difference]: Finished difference Result 44002 states and 67657 transitions. [2020-10-28 18:12:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:09,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:12:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:09,580 INFO L225 Difference]: With dead ends: 44002 [2020-10-28 18:12:09,580 INFO L226 Difference]: Without dead ends: 17249 [2020-10-28 18:12:09,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17249 states. [2020-10-28 18:12:11,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17249 to 17249. [2020-10-28 18:12:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17249 states. [2020-10-28 18:12:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17249 states to 17249 states and 26409 transitions. [2020-10-28 18:12:11,372 INFO L78 Accepts]: Start accepts. Automaton has 17249 states and 26409 transitions. Word has length 72 [2020-10-28 18:12:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:11,372 INFO L481 AbstractCegarLoop]: Abstraction has 17249 states and 26409 transitions. [2020-10-28 18:12:11,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17249 states and 26409 transitions. [2020-10-28 18:12:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:12:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:11,387 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] [2020-10-28 18:12:11,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:12:11,387 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash -36846911, now seen corresponding path program 1 times [2020-10-28 18:12:11,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:11,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995469955] [2020-10-28 18:12:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:11,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:16,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:12:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:12:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:16,809 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:16,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:16,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:16,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:16,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:16,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:12:16,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:16,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:16,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:16,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995469955] [2020-10-28 18:12:16,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:16,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555901298] [2020-10-28 18:12:16,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:16,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:16,853 INFO L87 Difference]: Start difference. First operand 17249 states and 26409 transitions. Second operand 5 states. [2020-10-28 18:12:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:18,535 INFO L93 Difference]: Finished difference Result 28175 states and 43113 transitions. [2020-10-28 18:12:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:18,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:12:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:18,562 INFO L225 Difference]: With dead ends: 28175 [2020-10-28 18:12:18,563 INFO L226 Difference]: Without dead ends: 11244 [2020-10-28 18:12:18,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11244 states. [2020-10-28 18:12:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11244 to 11242. [2020-10-28 18:12:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11242 states. [2020-10-28 18:12:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11242 states to 11242 states and 17060 transitions. [2020-10-28 18:12:19,729 INFO L78 Accepts]: Start accepts. Automaton has 11242 states and 17060 transitions. Word has length 72 [2020-10-28 18:12:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:19,729 INFO L481 AbstractCegarLoop]: Abstraction has 11242 states and 17060 transitions. [2020-10-28 18:12:19,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11242 states and 17060 transitions. [2020-10-28 18:12:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:12:19,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:19,738 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] [2020-10-28 18:12:19,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:12:19,738 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -169657965, now seen corresponding path program 1 times [2020-10-28 18:12:19,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:19,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916563794] [2020-10-28 18:12:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:19,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:24,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:24,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:12:24,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:12:24,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:12:24,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:24,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 18:12:24,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:12:24,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:25,122 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:25,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:25,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:25,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:12:25,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:25,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916563794] [2020-10-28 18:12:25,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:25,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399691316] [2020-10-28 18:12:25,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:25,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:25,161 INFO L87 Difference]: Start difference. First operand 11242 states and 17060 transitions. Second operand 5 states. [2020-10-28 18:12:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:26,516 INFO L93 Difference]: Finished difference Result 19250 states and 29255 transitions. [2020-10-28 18:12:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:26,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-28 18:12:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:26,539 INFO L225 Difference]: With dead ends: 19250 [2020-10-28 18:12:26,540 INFO L226 Difference]: Without dead ends: 9608 [2020-10-28 18:12:26,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2020-10-28 18:12:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9605. [2020-10-28 18:12:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9605 states. [2020-10-28 18:12:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 14518 transitions. [2020-10-28 18:12:27,415 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 14518 transitions. Word has length 72 [2020-10-28 18:12:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:27,416 INFO L481 AbstractCegarLoop]: Abstraction has 9605 states and 14518 transitions. [2020-10-28 18:12:27,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 14518 transitions. [2020-10-28 18:12:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:12:27,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:27,422 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] [2020-10-28 18:12:27,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:12:27,422 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1620784176, now seen corresponding path program 1 times [2020-10-28 18:12:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:27,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046708184] [2020-10-28 18:12:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:27,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:32,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:32,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:12:32,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:12:32,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:12:32,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:32,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:12:32,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:12:32,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:32,794 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:32,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:32,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:32,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:32,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:32,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:32,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:32,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046708184] [2020-10-28 18:12:32,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:32,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:32,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931394197] [2020-10-28 18:12:32,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:32,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:32,828 INFO L87 Difference]: Start difference. First operand 9605 states and 14518 transitions. Second operand 4 states. [2020-10-28 18:12:33,198 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:34,968 INFO L93 Difference]: Finished difference Result 18807 states and 28914 transitions. [2020-10-28 18:12:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:34,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 18:12:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:34,988 INFO L225 Difference]: With dead ends: 18807 [2020-10-28 18:12:34,989 INFO L226 Difference]: Without dead ends: 14124 [2020-10-28 18:12:34,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14124 states. [2020-10-28 18:12:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14124 to 14121. [2020-10-28 18:12:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14121 states. [2020-10-28 18:12:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14121 states to 14121 states and 21416 transitions. [2020-10-28 18:12:36,257 INFO L78 Accepts]: Start accepts. Automaton has 14121 states and 21416 transitions. Word has length 74 [2020-10-28 18:12:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:36,257 INFO L481 AbstractCegarLoop]: Abstraction has 14121 states and 21416 transitions. [2020-10-28 18:12:36,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14121 states and 21416 transitions. [2020-10-28 18:12:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 18:12:36,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:36,262 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] [2020-10-28 18:12:36,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:12:36,263 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:36,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:36,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2100060746, now seen corresponding path program 1 times [2020-10-28 18:12:36,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:36,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761419418] [2020-10-28 18:12:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:41,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:12:41,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:41,681 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:41,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:41,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:41,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761419418] [2020-10-28 18:12:41,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:41,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:41,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584737963] [2020-10-28 18:12:41,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:41,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:41,714 INFO L87 Difference]: Start difference. First operand 14121 states and 21416 transitions. Second operand 5 states. [2020-10-28 18:12:42,058 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:44,446 INFO L93 Difference]: Finished difference Result 23244 states and 35318 transitions. [2020-10-28 18:12:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:44,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-28 18:12:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:44,463 INFO L225 Difference]: With dead ends: 23244 [2020-10-28 18:12:44,463 INFO L226 Difference]: Without dead ends: 14116 [2020-10-28 18:12:44,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:12:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14116 states. [2020-10-28 18:12:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14116 to 14113. [2020-10-28 18:12:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14113 states. [2020-10-28 18:12:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14113 states to 14113 states and 21308 transitions. [2020-10-28 18:12:45,698 INFO L78 Accepts]: Start accepts. Automaton has 14113 states and 21308 transitions. Word has length 75 [2020-10-28 18:12:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:45,699 INFO L481 AbstractCegarLoop]: Abstraction has 14113 states and 21308 transitions. [2020-10-28 18:12:45,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14113 states and 21308 transitions. [2020-10-28 18:12:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 18:12:45,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:45,703 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] [2020-10-28 18:12:45,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:12:45,703 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash 410307164, now seen corresponding path program 1 times [2020-10-28 18:12:45,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:45,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812390005] [2020-10-28 18:12:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:50,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 18:12:50,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:51,049 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:51,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:51,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:51,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812390005] [2020-10-28 18:12:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027840119] [2020-10-28 18:12:51,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:51,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:51,081 INFO L87 Difference]: Start difference. First operand 14113 states and 21308 transitions. Second operand 4 states. [2020-10-28 18:12:51,475 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:12:53,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:53,672 INFO L93 Difference]: Finished difference Result 25095 states and 38504 transitions. [2020-10-28 18:12:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:53,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-28 18:12:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:53,700 INFO L225 Difference]: With dead ends: 25095 [2020-10-28 18:12:53,700 INFO L226 Difference]: Without dead ends: 18282 [2020-10-28 18:12:53,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2020-10-28 18:12:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 18279. [2020-10-28 18:12:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18279 states. [2020-10-28 18:12:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18279 states to 18279 states and 27718 transitions. [2020-10-28 18:12:55,418 INFO L78 Accepts]: Start accepts. Automaton has 18279 states and 27718 transitions. Word has length 76 [2020-10-28 18:12:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:55,418 INFO L481 AbstractCegarLoop]: Abstraction has 18279 states and 27718 transitions. [2020-10-28 18:12:55,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 18279 states and 27718 transitions. [2020-10-28 18:12:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 18:12:55,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:55,422 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] [2020-10-28 18:12:55,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:12:55,422 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1710637799, now seen corresponding path program 1 times [2020-10-28 18:12:55,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:55,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412515005] [2020-10-28 18:12:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:59,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:59,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 18:12:59,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:12:59,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3868 [2020-10-28 18:12:59,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:59,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:12:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 18:12:59,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:59,638 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:12:59,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:59,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:59,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412515005] [2020-10-28 18:12:59,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:59,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390963996] [2020-10-28 18:12:59,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:59,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:59,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:59,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:59,674 INFO L87 Difference]: Start difference. First operand 18279 states and 27718 transitions. Second operand 4 states. [2020-10-28 18:13:00,042 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:13:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:02,983 INFO L93 Difference]: Finished difference Result 41757 states and 64640 transitions. [2020-10-28 18:13:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:02,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 18:13:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:03,019 INFO L225 Difference]: With dead ends: 41757 [2020-10-28 18:13:03,019 INFO L226 Difference]: Without dead ends: 24720 [2020-10-28 18:13:03,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24720 states. [2020-10-28 18:13:05,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24720 to 24717. [2020-10-28 18:13:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24717 states. [2020-10-28 18:13:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24717 states to 24717 states and 38147 transitions. [2020-10-28 18:13:05,346 INFO L78 Accepts]: Start accepts. Automaton has 24717 states and 38147 transitions. Word has length 79 [2020-10-28 18:13:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:05,346 INFO L481 AbstractCegarLoop]: Abstraction has 24717 states and 38147 transitions. [2020-10-28 18:13:05,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:13:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 24717 states and 38147 transitions. [2020-10-28 18:13:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:13:05,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:05,349 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] [2020-10-28 18:13:05,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:13:05,350 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1365360152, now seen corresponding path program 1 times [2020-10-28 18:13:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:05,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281655849] [2020-10-28 18:13:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:05,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:05,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:05,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3165 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:13:08,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:13:08,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:08,939 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:13:08,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:08,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:08,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:08,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:08,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281655849] [2020-10-28 18:13:08,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:08,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:08,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146948460] [2020-10-28 18:13:08,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:08,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:08,976 INFO L87 Difference]: Start difference. First operand 24717 states and 38147 transitions. Second operand 5 states. [2020-10-28 18:13:09,349 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:13:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:12,551 INFO L93 Difference]: Finished difference Result 43429 states and 67089 transitions. [2020-10-28 18:13:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:13:12,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 18:13:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:12,590 INFO L225 Difference]: With dead ends: 43429 [2020-10-28 18:13:12,591 INFO L226 Difference]: Without dead ends: 24693 [2020-10-28 18:13:12,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24693 states. [2020-10-28 18:13:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24693 to 24690. [2020-10-28 18:13:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24690 states. [2020-10-28 18:13:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24690 states to 24690 states and 38017 transitions. [2020-10-28 18:13:15,110 INFO L78 Accepts]: Start accepts. Automaton has 24690 states and 38017 transitions. Word has length 82 [2020-10-28 18:13:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:15,110 INFO L481 AbstractCegarLoop]: Abstraction has 24690 states and 38017 transitions. [2020-10-28 18:13:15,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 24690 states and 38017 transitions. [2020-10-28 18:13:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:13:15,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:15,113 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] [2020-10-28 18:13:15,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:13:15,113 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1455510778, now seen corresponding path program 1 times [2020-10-28 18:13:15,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:15,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114314524] [2020-10-28 18:13:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:15,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:13:15,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:13:15,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 18:13:15,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:16,133 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:13:16,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:16,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:16,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:13:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:13:16,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:16,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114314524] [2020-10-28 18:13:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:16,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242325871] [2020-10-28 18:13:16,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:13:16,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:13:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:16,179 INFO L87 Difference]: Start difference. First operand 24690 states and 38017 transitions. Second operand 6 states. [2020-10-28 18:13:16,569 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-28 18:13:18,181 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:13:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:21,624 INFO L93 Difference]: Finished difference Result 61278 states and 95123 transitions. [2020-10-28 18:13:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:13:21,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:13:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:21,682 INFO L225 Difference]: With dead ends: 61278 [2020-10-28 18:13:21,682 INFO L226 Difference]: Without dead ends: 37803 [2020-10-28 18:13:21,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:13:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37803 states. [2020-10-28 18:13:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37803 to 37800. [2020-10-28 18:13:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37800 states. [2020-10-28 18:13:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37800 states to 37800 states and 57940 transitions. [2020-10-28 18:13:26,331 INFO L78 Accepts]: Start accepts. Automaton has 37800 states and 57940 transitions. Word has length 83 [2020-10-28 18:13:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:26,331 INFO L481 AbstractCegarLoop]: Abstraction has 37800 states and 57940 transitions. [2020-10-28 18:13:26,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:13:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37800 states and 57940 transitions. [2020-10-28 18:13:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:13:26,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:26,334 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] [2020-10-28 18:13:26,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:13:26,334 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1621068693, now seen corresponding path program 1 times [2020-10-28 18:13:26,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:26,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514018455] [2020-10-28 18:13:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:26,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:13:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:13:26,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:13:26,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:26,958 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:13:26,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:26,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:26,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:26,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514018455] [2020-10-28 18:13:26,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:26,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:13:26,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373414565] [2020-10-28 18:13:26,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:13:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:13:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:26,999 INFO L87 Difference]: Start difference. First operand 37800 states and 57940 transitions. Second operand 6 states. [2020-10-28 18:13:27,448 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-28 18:13:29,265 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:13:29,584 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 18:13:30,881 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:13:31,221 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 18:13:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:50,155 INFO L93 Difference]: Finished difference Result 221339 states and 343307 transitions. [2020-10-28 18:13:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:13:50,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-28 18:13:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:50,527 INFO L225 Difference]: With dead ends: 221339 [2020-10-28 18:13:50,527 INFO L226 Difference]: Without dead ends: 184754 [2020-10-28 18:13:50,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:13:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184754 states. [2020-10-28 18:14:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184754 to 73194. [2020-10-28 18:14:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73194 states. [2020-10-28 18:14:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73194 states to 73194 states and 111532 transitions. [2020-10-28 18:14:01,049 INFO L78 Accepts]: Start accepts. Automaton has 73194 states and 111532 transitions. Word has length 83 [2020-10-28 18:14:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:01,050 INFO L481 AbstractCegarLoop]: Abstraction has 73194 states and 111532 transitions. [2020-10-28 18:14:01,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:14:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 73194 states and 111532 transitions. [2020-10-28 18:14:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:14:01,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:01,052 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] [2020-10-28 18:14:01,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:14:01,052 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash -623755912, now seen corresponding path program 1 times [2020-10-28 18:14:01,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:01,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090034499] [2020-10-28 18:14:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:01,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:01,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:14:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:01,784 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 18:14:01,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:01,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:01,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:01,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:01,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090034499] [2020-10-28 18:14:01,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:01,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:01,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115726938] [2020-10-28 18:14:01,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:01,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:01,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:01,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:01,814 INFO L87 Difference]: Start difference. First operand 73194 states and 111532 transitions. Second operand 5 states. [2020-10-28 18:14:02,200 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-28 18:14:05,006 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 18:14:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:30,106 INFO L93 Difference]: Finished difference Result 283809 states and 434026 transitions. [2020-10-28 18:14:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:14:30,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 18:14:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:30,599 INFO L225 Difference]: With dead ends: 283809 [2020-10-28 18:14:30,599 INFO L226 Difference]: Without dead ends: 211830 [2020-10-28 18:14:30,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:14:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211830 states.