/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:26:30,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:26:30,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:26:31,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:26:31,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:26:31,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:26:31,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:26:31,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:26:31,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:26:31,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:26:31,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:26:31,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:26:31,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:26:31,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:26:31,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:26:31,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:26:31,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:26:31,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:26:31,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:26:31,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:26:31,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:26:31,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:26:31,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:26:31,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:26:31,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:26:31,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:26:31,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:26:31,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:26:31,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:26:31,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:26:31,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:26:31,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:26:31,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:26:31,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:26:31,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:26:31,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:26:31,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:26:31,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:26:31,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:26:31,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:26:31,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:26:31,156 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 00:26:31,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:26:31,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:26:31,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:26:31,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:26:31,200 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:26:31,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:26:31,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:26:31,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:26:31,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:26:31,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:26:31,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:26:31,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:26:31,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:26:31,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:26:31,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:26:31,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:26:31,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:26:31,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:26:31,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:26:31,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:26:31,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:26:31,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:26:31,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:26:31,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:26:31,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:26:31,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:26:31,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:26:31,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:26:31,711 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:26:31,711 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:26:31,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:26:31,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2154e3/06bdb7d4c97b47b2860c2553ee7f7631/FLAG38597c37d [2020-10-28 00:26:32,560 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:26:32,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:26:32,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2154e3/06bdb7d4c97b47b2860c2553ee7f7631/FLAG38597c37d [2020-10-28 00:26:32,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1f2154e3/06bdb7d4c97b47b2860c2553ee7f7631 [2020-10-28 00:26:32,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:26:32,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:26:32,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:32,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:26:32,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:26:32,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:32" (1/1) ... [2020-10-28 00:26:32,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec93ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:32, skipping insertion in model container [2020-10-28 00:26:32,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:26:32" (1/1) ... [2020-10-28 00:26:32,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:26:32,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:26:33,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:33,241 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:26:33,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:26:33,395 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:26:33,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33 WrapperNode [2020-10-28 00:26:33,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:26:33,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:26:33,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:26:33,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:26:33,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (1/1) ... [2020-10-28 00:26:33,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:26:33,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:26:33,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:26:33,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:26:33,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (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 00:26:33,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:26:33,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:26:33,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:26:33,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:26:33,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:26:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:26:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:26:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:26:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:26:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:26:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:26:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:26:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:26:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:26:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:26:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:26:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:26:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:26:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:26:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:26:33,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:26:34,974 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:26:34,974 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:26:34,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:34 BoogieIcfgContainer [2020-10-28 00:26:34,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:26:34,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:26:34,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:26:34,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:26:34,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:26:32" (1/3) ... [2020-10-28 00:26:34,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59804a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:34, skipping insertion in model container [2020-10-28 00:26:34,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:26:33" (2/3) ... [2020-10-28 00:26:34,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59804a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:26:34, skipping insertion in model container [2020-10-28 00:26:34,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:26:34" (3/3) ... [2020-10-28 00:26:34,992 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 00:26:35,006 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:26:35,012 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:26:35,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:26:35,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:26:35,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:26:35,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:26:35,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:26:35,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:26:35,084 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:26:35,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:26:35,084 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:26:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2020-10-28 00:26:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 00:26:35,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:35,140 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] [2020-10-28 00:26:35,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1233459878, now seen corresponding path program 1 times [2020-10-28 00:26:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406440678] [2020-10-28 00:26:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:36,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:38,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 00:26:38,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:26:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2851 [2020-10-28 00:26:38,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:26:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:26:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:26:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:26:38,910 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:38,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:38,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:38,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:38,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:38,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:26:38,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:38,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:38,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:38,987 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 00:26:38,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406440678] [2020-10-28 00:26:38,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:38,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:26:38,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626419258] [2020-10-28 00:26:38,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:26:38,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:26:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:26:39,022 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 6 states. [2020-10-28 00:26:39,506 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:26:40,859 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:41,272 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:41,764 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:26:42,124 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:42,205 INFO L93 Difference]: Finished difference Result 722 states and 1204 transitions. [2020-10-28 00:26:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:26:42,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 00:26:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:42,228 INFO L225 Difference]: With dead ends: 722 [2020-10-28 00:26:42,228 INFO L226 Difference]: Without dead ends: 601 [2020-10-28 00:26:42,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:26:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-28 00:26:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 238. [2020-10-28 00:26:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 00:26:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 375 transitions. [2020-10-28 00:26:42,334 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 375 transitions. Word has length 67 [2020-10-28 00:26:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:42,336 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 375 transitions. [2020-10-28 00:26:42,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:26:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 375 transitions. [2020-10-28 00:26:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:26:42,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:42,351 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 00:26:42,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:26:42,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1967253613, now seen corresponding path program 1 times [2020-10-28 00:26:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:42,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255890681] [2020-10-28 00:26:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:42,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:42,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:45,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:45,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:26:45,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:45,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3272 [2020-10-28 00:26:45,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:26:45,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:45,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:26:45,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 00:26:46,072 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:46,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:46,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:46,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:46,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:46,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:46,124 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 00:26:46,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255890681] [2020-10-28 00:26:46,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:46,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:26:46,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27038633] [2020-10-28 00:26:46,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:26:46,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:26:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:26:46,140 INFO L87 Difference]: Start difference. First operand 238 states and 375 transitions. Second operand 7 states. [2020-10-28 00:26:46,572 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:26:47,820 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:48,227 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:48,651 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:49,089 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:26:49,482 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:26:50,168 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:26:50,781 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:50,812 INFO L93 Difference]: Finished difference Result 1492 states and 2451 transitions. [2020-10-28 00:26:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:26:50,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-28 00:26:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:50,821 INFO L225 Difference]: With dead ends: 1492 [2020-10-28 00:26:50,821 INFO L226 Difference]: Without dead ends: 1315 [2020-10-28 00:26:50,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:26:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-10-28 00:26:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 695. [2020-10-28 00:26:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 00:26:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1134 transitions. [2020-10-28 00:26:50,896 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1134 transitions. Word has length 68 [2020-10-28 00:26:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:50,897 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1134 transitions. [2020-10-28 00:26:50,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:26:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1134 transitions. [2020-10-28 00:26:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:26:50,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:50,899 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 00:26:50,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:26:50,899 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash -913645665, now seen corresponding path program 1 times [2020-10-28 00:26:50,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:50,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481164331] [2020-10-28 00:26:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:50,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:51,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:53,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:53,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:26:53,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2598 [2020-10-28 00:26:53,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:26:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:53,929 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:53,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:53,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:53,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:53,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:53,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:53,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:53,983 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 00:26:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481164331] [2020-10-28 00:26:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:53,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851032788] [2020-10-28 00:26:53,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:53,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:53,987 INFO L87 Difference]: Start difference. First operand 695 states and 1134 transitions. Second operand 5 states. [2020-10-28 00:26:54,377 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:26:55,410 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:26:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:26:55,523 INFO L93 Difference]: Finished difference Result 2439 states and 4034 transitions. [2020-10-28 00:26:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:26:55,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 00:26:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:26:55,535 INFO L225 Difference]: With dead ends: 2439 [2020-10-28 00:26:55,536 INFO L226 Difference]: Without dead ends: 1861 [2020-10-28 00:26:55,539 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 00:26:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2020-10-28 00:26:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1273. [2020-10-28 00:26:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1273 states. [2020-10-28 00:26:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2092 transitions. [2020-10-28 00:26:55,634 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2092 transitions. Word has length 69 [2020-10-28 00:26:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:26:55,634 INFO L481 AbstractCegarLoop]: Abstraction has 1273 states and 2092 transitions. [2020-10-28 00:26:55,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:26:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2092 transitions. [2020-10-28 00:26:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:26:55,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:26:55,636 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] [2020-10-28 00:26:55,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:26:55,637 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:26:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:26:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 114088646, now seen corresponding path program 1 times [2020-10-28 00:26:55,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:26:55,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579392909] [2020-10-28 00:26:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:26:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:55,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:56,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:58,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2510 [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:26:58,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:26:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:26:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:58,663 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:26:58,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:26:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:26:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:26:58,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:26:58,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:26:58,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:26:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:26:58,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:26:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:26:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:26:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:26:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:26:58,723 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 00:26:58,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579392909] [2020-10-28 00:26:58,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:26:58,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:26:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559111690] [2020-10-28 00:26:58,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:26:58,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:26:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:26:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:26:58,728 INFO L87 Difference]: Start difference. First operand 1273 states and 2092 transitions. Second operand 5 states. [2020-10-28 00:26:59,122 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:27:00,282 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:00,516 INFO L93 Difference]: Finished difference Result 4711 states and 7798 transitions. [2020-10-28 00:27:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 00:27:00,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 00:27:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:00,536 INFO L225 Difference]: With dead ends: 4711 [2020-10-28 00:27:00,536 INFO L226 Difference]: Without dead ends: 3565 [2020-10-28 00:27:00,540 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 00:27:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2020-10-28 00:27:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2402. [2020-10-28 00:27:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-10-28 00:27:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3956 transitions. [2020-10-28 00:27:00,719 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3956 transitions. Word has length 70 [2020-10-28 00:27:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:00,720 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 3956 transitions. [2020-10-28 00:27:00,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:27:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3956 transitions. [2020-10-28 00:27:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:27:00,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:00,722 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] [2020-10-28 00:27:00,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:27:00,723 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash 157355866, now seen corresponding path program 1 times [2020-10-28 00:27:00,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:00,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201596013] [2020-10-28 00:27:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:00,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:00,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:05,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:05,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:27:05,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:05,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 00:27:05,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:06,187 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:06,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:06,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:06,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:06,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:06,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:06,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:27:06,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:06,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:06,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:06,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:06,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:06,248 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 00:27:06,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201596013] [2020-10-28 00:27:06,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:06,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:06,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475142190] [2020-10-28 00:27:06,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:06,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:06,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:06,251 INFO L87 Difference]: Start difference. First operand 2402 states and 3956 transitions. Second operand 4 states. [2020-10-28 00:27:06,626 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:27:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:08,009 INFO L93 Difference]: Finished difference Result 6391 states and 10549 transitions. [2020-10-28 00:27:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:08,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:27:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:08,034 INFO L225 Difference]: With dead ends: 6391 [2020-10-28 00:27:08,034 INFO L226 Difference]: Without dead ends: 4066 [2020-10-28 00:27:08,044 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 00:27:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2020-10-28 00:27:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 4063. [2020-10-28 00:27:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4063 states. [2020-10-28 00:27:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 6667 transitions. [2020-10-28 00:27:08,362 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 6667 transitions. Word has length 71 [2020-10-28 00:27:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:08,363 INFO L481 AbstractCegarLoop]: Abstraction has 4063 states and 6667 transitions. [2020-10-28 00:27:08,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 6667 transitions. [2020-10-28 00:27:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:27:08,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:08,365 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] [2020-10-28 00:27:08,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:27:08,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:08,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:08,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2094711827, now seen corresponding path program 1 times [2020-10-28 00:27:08,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:08,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410067397] [2020-10-28 00:27:08,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:13,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:13,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:27:13,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:13,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 00:27:13,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 00:27:13,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 00:27:13,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:27:13,976 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:13,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:14,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:14,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:14,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:27:14,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:14,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:14,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:14,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:14,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:27:14,036 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 00:27:14,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410067397] [2020-10-28 00:27:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053357266] [2020-10-28 00:27:14,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:14,043 INFO L87 Difference]: Start difference. First operand 4063 states and 6667 transitions. Second operand 4 states. [2020-10-28 00:27:14,440 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:27:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:15,752 INFO L93 Difference]: Finished difference Result 10754 states and 17647 transitions. [2020-10-28 00:27:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:15,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:27:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:15,791 INFO L225 Difference]: With dead ends: 10754 [2020-10-28 00:27:15,791 INFO L226 Difference]: Without dead ends: 6784 [2020-10-28 00:27:15,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:27:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2020-10-28 00:27:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6781. [2020-10-28 00:27:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6781 states. [2020-10-28 00:27:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 11051 transitions. [2020-10-28 00:27:16,316 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 11051 transitions. Word has length 71 [2020-10-28 00:27:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:16,316 INFO L481 AbstractCegarLoop]: Abstraction has 6781 states and 11051 transitions. [2020-10-28 00:27:16,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 11051 transitions. [2020-10-28 00:27:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:27:16,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:16,317 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] [2020-10-28 00:27:16,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:27:16,318 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:16,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1034528335, now seen corresponding path program 1 times [2020-10-28 00:27:16,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:16,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472135855] [2020-10-28 00:27:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:16,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:16,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:21,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:27:21,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:27:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:21,794 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:21,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:21,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:21,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:27:21,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:21,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:21,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:21,836 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 00:27:21,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472135855] [2020-10-28 00:27:21,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:21,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:21,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889468452] [2020-10-28 00:27:21,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:21,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:21,839 INFO L87 Difference]: Start difference. First operand 6781 states and 11051 transitions. Second operand 4 states. [2020-10-28 00:27:22,202 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:27:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:23,646 INFO L93 Difference]: Finished difference Result 17731 states and 28831 transitions. [2020-10-28 00:27:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:23,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 00:27:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:23,706 INFO L225 Difference]: With dead ends: 17731 [2020-10-28 00:27:23,706 INFO L226 Difference]: Without dead ends: 11045 [2020-10-28 00:27:23,724 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 00:27:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11045 states. [2020-10-28 00:27:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11045 to 11008. [2020-10-28 00:27:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11008 states. [2020-10-28 00:27:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11008 states to 11008 states and 17745 transitions. [2020-10-28 00:27:24,583 INFO L78 Accepts]: Start accepts. Automaton has 11008 states and 17745 transitions. Word has length 71 [2020-10-28 00:27:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:24,584 INFO L481 AbstractCegarLoop]: Abstraction has 11008 states and 17745 transitions. [2020-10-28 00:27:24,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11008 states and 17745 transitions. [2020-10-28 00:27:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:27:24,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:24,585 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 00:27:24,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:27:24,586 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash -974900522, now seen corresponding path program 1 times [2020-10-28 00:27:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:24,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912484716] [2020-10-28 00:27:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:25,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:25,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 00:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:27:25,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:26,173 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:26,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:26,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:26,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:26,210 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 00:27:26,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912484716] [2020-10-28 00:27:26,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:26,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:26,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627010786] [2020-10-28 00:27:26,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:26,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:26,213 INFO L87 Difference]: Start difference. First operand 11008 states and 17745 transitions. Second operand 4 states. [2020-10-28 00:27:27,176 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:28,120 INFO L93 Difference]: Finished difference Result 27974 states and 44709 transitions. [2020-10-28 00:27:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:28,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 00:27:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:28,173 INFO L225 Difference]: With dead ends: 27974 [2020-10-28 00:27:28,173 INFO L226 Difference]: Without dead ends: 17027 [2020-10-28 00:27:28,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:27:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17027 states. [2020-10-28 00:27:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17027 to 17024. [2020-10-28 00:27:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17024 states. [2020-10-28 00:27:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 26561 transitions. [2020-10-28 00:27:29,471 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 26561 transitions. Word has length 72 [2020-10-28 00:27:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:29,472 INFO L481 AbstractCegarLoop]: Abstraction has 17024 states and 26561 transitions. [2020-10-28 00:27:29,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 26561 transitions. [2020-10-28 00:27:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:27:29,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:29,473 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] [2020-10-28 00:27:29,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:27:29,473 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash 15864717, now seen corresponding path program 1 times [2020-10-28 00:27:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219903288] [2020-10-28 00:27:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:30,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:27:30,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:27:30,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 955 [2020-10-28 00:27:30,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:27:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:27:30,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:30,848 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:30,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:30,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:30,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:30,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:30,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:27:30,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:30,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:30,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:27:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219903288] [2020-10-28 00:27:30,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:30,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446730740] [2020-10-28 00:27:30,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:30,904 INFO L87 Difference]: Start difference. First operand 17024 states and 26561 transitions. Second operand 4 states. [2020-10-28 00:27:31,305 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:32,800 INFO L93 Difference]: Finished difference Result 38595 states and 60243 transitions. [2020-10-28 00:27:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:32,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 00:27:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:32,861 INFO L225 Difference]: With dead ends: 38595 [2020-10-28 00:27:32,861 INFO L226 Difference]: Without dead ends: 21632 [2020-10-28 00:27:32,897 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 00:27:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21632 states. [2020-10-28 00:27:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21632 to 21629. [2020-10-28 00:27:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21629 states. [2020-10-28 00:27:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21629 states to 21629 states and 33663 transitions. [2020-10-28 00:27:34,055 INFO L78 Accepts]: Start accepts. Automaton has 21629 states and 33663 transitions. Word has length 73 [2020-10-28 00:27:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:34,055 INFO L481 AbstractCegarLoop]: Abstraction has 21629 states and 33663 transitions. [2020-10-28 00:27:34,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21629 states and 33663 transitions. [2020-10-28 00:27:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 00:27:34,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:34,056 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 00:27:34,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:27:34,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1107276276, now seen corresponding path program 1 times [2020-10-28 00:27:34,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:34,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628203758] [2020-10-28 00:27:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:34,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:35,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:35,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1857 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:27:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:36,303 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:36,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:36,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:36,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:36,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:36,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:36,341 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 00:27:36,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628203758] [2020-10-28 00:27:36,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:36,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:36,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534805987] [2020-10-28 00:27:36,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:36,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:36,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:36,344 INFO L87 Difference]: Start difference. First operand 21629 states and 33663 transitions. Second operand 4 states. [2020-10-28 00:27:36,713 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:38,727 INFO L93 Difference]: Finished difference Result 48921 states and 76173 transitions. [2020-10-28 00:27:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:38,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-28 00:27:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:38,802 INFO L225 Difference]: With dead ends: 48921 [2020-10-28 00:27:38,802 INFO L226 Difference]: Without dead ends: 27400 [2020-10-28 00:27:38,860 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 00:27:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27400 states. [2020-10-28 00:27:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27400 to 27397. [2020-10-28 00:27:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27397 states. [2020-10-28 00:27:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27397 states to 27397 states and 42539 transitions. [2020-10-28 00:27:40,623 INFO L78 Accepts]: Start accepts. Automaton has 27397 states and 42539 transitions. Word has length 75 [2020-10-28 00:27:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:40,623 INFO L481 AbstractCegarLoop]: Abstraction has 27397 states and 42539 transitions. [2020-10-28 00:27:40,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27397 states and 42539 transitions. [2020-10-28 00:27:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 00:27:40,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:40,630 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] [2020-10-28 00:27:40,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:27:40,630 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:40,632 INFO L82 PathProgramCache]: Analyzing trace with hash 21846219, now seen corresponding path program 1 times [2020-10-28 00:27:40,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492703590] [2020-10-28 00:27:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:40,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:45,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:45,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4943 [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:27:45,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 00:27:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:45,960 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:45,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:45,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:45,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:45,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:45,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:45,990 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 00:27:45,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492703590] [2020-10-28 00:27:45,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:45,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:27:45,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351661678] [2020-10-28 00:27:45,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:27:45,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:27:45,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:27:45,992 INFO L87 Difference]: Start difference. First operand 27397 states and 42539 transitions. Second operand 4 states. [2020-10-28 00:27:46,364 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:27:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:27:48,330 INFO L93 Difference]: Finished difference Result 58614 states and 91247 transitions. [2020-10-28 00:27:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:27:48,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-28 00:27:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:27:48,392 INFO L225 Difference]: With dead ends: 58614 [2020-10-28 00:27:48,393 INFO L226 Difference]: Without dead ends: 31312 [2020-10-28 00:27:48,430 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 00:27:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2020-10-28 00:27:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 31309. [2020-10-28 00:27:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31309 states. [2020-10-28 00:27:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31309 states to 31309 states and 48566 transitions. [2020-10-28 00:27:50,322 INFO L78 Accepts]: Start accepts. Automaton has 31309 states and 48566 transitions. Word has length 77 [2020-10-28 00:27:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:27:50,322 INFO L481 AbstractCegarLoop]: Abstraction has 31309 states and 48566 transitions. [2020-10-28 00:27:50,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:27:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31309 states and 48566 transitions. [2020-10-28 00:27:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 00:27:50,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:27:50,323 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] [2020-10-28 00:27:50,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:27:50,323 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:27:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:27:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 730232441, now seen corresponding path program 1 times [2020-10-28 00:27:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:27:50,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82568939] [2020-10-28 00:27:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:27:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:50,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:50,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:51,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:27:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:55,768 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:27:55,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:27:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:27:55,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:27:55,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:27:55,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:27:55,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:27:55,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:27:55,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:27:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:27:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:27:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:27:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:27:55,812 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 00:27:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82568939] [2020-10-28 00:27:55,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:27:55,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:27:55,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839754283] [2020-10-28 00:27:55,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:27:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:27:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:27:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:27:55,815 INFO L87 Difference]: Start difference. First operand 31309 states and 48566 transitions. Second operand 6 states. [2020-10-28 00:27:56,209 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:27:57,307 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:27:57,705 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:27:58,290 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:28:00,045 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:00,925 INFO L93 Difference]: Finished difference Result 89365 states and 138818 transitions. [2020-10-28 00:28:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:28:00,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 00:28:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:01,036 INFO L225 Difference]: With dead ends: 89365 [2020-10-28 00:28:01,036 INFO L226 Difference]: Without dead ends: 58151 [2020-10-28 00:28:01,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:28:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58151 states. [2020-10-28 00:28:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58151 to 31309. [2020-10-28 00:28:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31309 states. [2020-10-28 00:28:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31309 states to 31309 states and 48425 transitions. [2020-10-28 00:28:03,550 INFO L78 Accepts]: Start accepts. Automaton has 31309 states and 48425 transitions. Word has length 78 [2020-10-28 00:28:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:03,550 INFO L481 AbstractCegarLoop]: Abstraction has 31309 states and 48425 transitions. [2020-10-28 00:28:03,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 31309 states and 48425 transitions. [2020-10-28 00:28:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:28:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:03,552 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] [2020-10-28 00:28:03,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:28:03,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 897598347, now seen corresponding path program 1 times [2020-10-28 00:28:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:03,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159771102] [2020-10-28 00:28:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:03,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:08,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:08,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:28:08,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:28:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:28:08,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:28:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 00:28:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:28:08,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:09,021 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:09,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:09,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:09,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:09,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:09,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:09,066 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 00:28:09,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159771102] [2020-10-28 00:28:09,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:09,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:28:09,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065151827] [2020-10-28 00:28:09,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:28:09,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:09,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:28:09,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:28:09,068 INFO L87 Difference]: Start difference. First operand 31309 states and 48425 transitions. Second operand 6 states. [2020-10-28 00:28:09,517 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 00:28:10,729 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 00:28:11,122 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:11,706 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-28 00:28:14,467 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:17,168 INFO L93 Difference]: Finished difference Result 138591 states and 214961 transitions. [2020-10-28 00:28:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:28:17,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:28:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:17,509 INFO L225 Difference]: With dead ends: 138591 [2020-10-28 00:28:17,509 INFO L226 Difference]: Without dead ends: 107377 [2020-10-28 00:28:17,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:28:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107377 states. [2020-10-28 00:28:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107377 to 57826. [2020-10-28 00:28:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-10-28 00:28:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 89171 transitions. [2020-10-28 00:28:21,866 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 89171 transitions. Word has length 81 [2020-10-28 00:28:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:21,867 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 89171 transitions. [2020-10-28 00:28:21,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:28:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 89171 transitions. [2020-10-28 00:28:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:28:21,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:21,868 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 00:28:21,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:28:21,868 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1996216828, now seen corresponding path program 1 times [2020-10-28 00:28:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:21,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563654390] [2020-10-28 00:28:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:21,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:21,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:22,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:26,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:26,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:28:26,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:28:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:28:26,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:28:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 00:28:26,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:28:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:27,322 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:27,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:27,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:27,357 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 00:28:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563654390] [2020-10-28 00:28:27,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:27,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:28:27,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365440484] [2020-10-28 00:28:27,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:28:27,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:28:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:28:27,359 INFO L87 Difference]: Start difference. First operand 57826 states and 89171 transitions. Second operand 5 states. [2020-10-28 00:28:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:32,860 INFO L93 Difference]: Finished difference Result 80078 states and 122367 transitions. [2020-10-28 00:28:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:28:32,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-28 00:28:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:32,968 INFO L225 Difference]: With dead ends: 80078 [2020-10-28 00:28:32,969 INFO L226 Difference]: Without dead ends: 80075 [2020-10-28 00:28:32,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 00:28:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80075 states. [2020-10-28 00:28:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80075 to 58318. [2020-10-28 00:28:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58318 states. [2020-10-28 00:28:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58318 states to 58318 states and 89618 transitions. [2020-10-28 00:28:37,450 INFO L78 Accepts]: Start accepts. Automaton has 58318 states and 89618 transitions. Word has length 82 [2020-10-28 00:28:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:37,450 INFO L481 AbstractCegarLoop]: Abstraction has 58318 states and 89618 transitions. [2020-10-28 00:28:37,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:28:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 58318 states and 89618 transitions. [2020-10-28 00:28:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:28:37,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:37,452 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:37,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:28:37,453 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2080912050, now seen corresponding path program 1 times [2020-10-28 00:28:37,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:37,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414841535] [2020-10-28 00:28:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:37,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:28:42,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:42,851 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:42,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:42,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:42,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:42,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:42,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:28:42,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:42,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:42,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414841535] [2020-10-28 00:28:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:42,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180878606] [2020-10-28 00:28:42,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:42,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:42,899 INFO L87 Difference]: Start difference. First operand 58318 states and 89618 transitions. Second operand 4 states. [2020-10-28 00:28:44,435 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:47,055 INFO L93 Difference]: Finished difference Result 104800 states and 161210 transitions. [2020-10-28 00:28:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:47,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:28:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:47,117 INFO L225 Difference]: With dead ends: 104800 [2020-10-28 00:28:47,117 INFO L226 Difference]: Without dead ends: 46577 [2020-10-28 00:28:47,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:28:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46577 states. [2020-10-28 00:28:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46577 to 46513. [2020-10-28 00:28:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46513 states. [2020-10-28 00:28:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46513 states to 46513 states and 71132 transitions. [2020-10-28 00:28:50,632 INFO L78 Accepts]: Start accepts. Automaton has 46513 states and 71132 transitions. Word has length 106 [2020-10-28 00:28:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:28:50,633 INFO L481 AbstractCegarLoop]: Abstraction has 46513 states and 71132 transitions. [2020-10-28 00:28:50,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:28:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46513 states and 71132 transitions. [2020-10-28 00:28:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:28:50,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:28:50,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:50,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:28:50,636 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:28:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:28:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1288871803, now seen corresponding path program 1 times [2020-10-28 00:28:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:28:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286614489] [2020-10-28 00:28:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:28:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:50,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:50,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:51,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:54,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:55,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 00:28:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:28:55,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:56,064 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:28:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:28:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:28:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:28:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:28:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:28:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:28:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:28:56,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286614489] [2020-10-28 00:28:56,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:28:56,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:28:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442396522] [2020-10-28 00:28:56,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:28:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:28:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:28:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:28:56,103 INFO L87 Difference]: Start difference. First operand 46513 states and 71132 transitions. Second operand 4 states. [2020-10-28 00:28:57,528 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:28:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:28:58,716 INFO L93 Difference]: Finished difference Result 66860 states and 102285 transitions. [2020-10-28 00:28:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:28:58,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2020-10-28 00:28:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:28:58,742 INFO L225 Difference]: With dead ends: 66860 [2020-10-28 00:28:58,742 INFO L226 Difference]: Without dead ends: 20442 [2020-10-28 00:28:58,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:28:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20442 states. [2020-10-28 00:29:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20442 to 19927. [2020-10-28 00:29:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19927 states. [2020-10-28 00:29:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19927 states to 19927 states and 30383 transitions. [2020-10-28 00:29:00,333 INFO L78 Accepts]: Start accepts. Automaton has 19927 states and 30383 transitions. Word has length 106 [2020-10-28 00:29:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:00,334 INFO L481 AbstractCegarLoop]: Abstraction has 19927 states and 30383 transitions. [2020-10-28 00:29:00,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19927 states and 30383 transitions. [2020-10-28 00:29:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:29:00,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:00,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:00,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:29:00,336 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash 680341659, now seen corresponding path program 1 times [2020-10-28 00:29:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:00,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383131541] [2020-10-28 00:29:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:29:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:05,731 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:05,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:05,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:05,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383131541] [2020-10-28 00:29:05,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:29:05,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:29:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411768664] [2020-10-28 00:29:05,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:29:05,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:29:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:05,767 INFO L87 Difference]: Start difference. First operand 19927 states and 30383 transitions. Second operand 6 states. [2020-10-28 00:29:06,152 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:29:07,289 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:29:07,695 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:29:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:09,842 INFO L93 Difference]: Finished difference Result 51687 states and 79095 transitions. [2020-10-28 00:29:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:29:09,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2020-10-28 00:29:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:09,888 INFO L225 Difference]: With dead ends: 51687 [2020-10-28 00:29:09,888 INFO L226 Difference]: Without dead ends: 31880 [2020-10-28 00:29:09,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:29:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31880 states. [2020-10-28 00:29:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31880 to 31874. [2020-10-28 00:29:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31874 states. [2020-10-28 00:29:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31874 states to 31874 states and 48520 transitions. [2020-10-28 00:29:12,552 INFO L78 Accepts]: Start accepts. Automaton has 31874 states and 48520 transitions. Word has length 107 [2020-10-28 00:29:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:12,552 INFO L481 AbstractCegarLoop]: Abstraction has 31874 states and 48520 transitions. [2020-10-28 00:29:12,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:29:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 31874 states and 48520 transitions. [2020-10-28 00:29:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:29:12,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:12,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:12,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:29:12,554 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 680810146, now seen corresponding path program 1 times [2020-10-28 00:29:12,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:12,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061192537] [2020-10-28 00:29:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:12,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:17,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:17,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:29:17,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:29:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:17,963 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:17,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:17,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:17,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061192537] [2020-10-28 00:29:17,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:17,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:29:17,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340854360] [2020-10-28 00:29:17,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:29:17,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:17,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:29:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:29:17,997 INFO L87 Difference]: Start difference. First operand 31874 states and 48520 transitions. Second operand 4 states. [2020-10-28 00:29:19,265 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-28 00:29:19,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:19,998 INFO L93 Difference]: Finished difference Result 44682 states and 68039 transitions. [2020-10-28 00:29:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:29:19,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-28 00:29:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:20,018 INFO L225 Difference]: With dead ends: 44682 [2020-10-28 00:29:20,018 INFO L226 Difference]: Without dead ends: 12928 [2020-10-28 00:29:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:29:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2020-10-28 00:29:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 12857. [2020-10-28 00:29:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12857 states. [2020-10-28 00:29:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12857 states to 12857 states and 19460 transitions. [2020-10-28 00:29:21,039 INFO L78 Accepts]: Start accepts. Automaton has 12857 states and 19460 transitions. Word has length 107 [2020-10-28 00:29:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:21,039 INFO L481 AbstractCegarLoop]: Abstraction has 12857 states and 19460 transitions. [2020-10-28 00:29:21,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12857 states and 19460 transitions. [2020-10-28 00:29:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:29:21,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:21,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:21,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:29:21,041 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1103017589, now seen corresponding path program 1 times [2020-10-28 00:29:21,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:21,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976015745] [2020-10-28 00:29:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:21,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:22,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:23,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:23,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:26,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 00:29:26,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:26,451 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:26,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:26,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:26,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:26,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976015745] [2020-10-28 00:29:26,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:29:26,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:29:26,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212363009] [2020-10-28 00:29:26,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:29:26,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:29:26,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:29:26,486 INFO L87 Difference]: Start difference. First operand 12857 states and 19460 transitions. Second operand 6 states. [2020-10-28 00:29:26,888 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 00:29:27,957 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-28 00:29:28,362 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 00:29:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:29,731 INFO L93 Difference]: Finished difference Result 22471 states and 34090 transitions. [2020-10-28 00:29:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 00:29:29,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-28 00:29:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:29,758 INFO L225 Difference]: With dead ends: 22471 [2020-10-28 00:29:29,758 INFO L226 Difference]: Without dead ends: 15943 [2020-10-28 00:29:29,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:29:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15943 states. [2020-10-28 00:29:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15943 to 15813. [2020-10-28 00:29:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15813 states. [2020-10-28 00:29:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15813 states to 15813 states and 23962 transitions. [2020-10-28 00:29:31,135 INFO L78 Accepts]: Start accepts. Automaton has 15813 states and 23962 transitions. Word has length 108 [2020-10-28 00:29:31,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:31,135 INFO L481 AbstractCegarLoop]: Abstraction has 15813 states and 23962 transitions. [2020-10-28 00:29:31,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:29:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 15813 states and 23962 transitions. [2020-10-28 00:29:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:29:31,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:31,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:31,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:29:31,138 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash 896290522, now seen corresponding path program 1 times [2020-10-28 00:29:31,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:31,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010715356] [2020-10-28 00:29:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:31,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:31,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:33,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:36,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:36,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 00:29:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:36,512 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:36,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:36,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:36,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:36,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:29:36,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010715356] [2020-10-28 00:29:36,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:36,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:29:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995133718] [2020-10-28 00:29:36,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:29:36,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:29:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:29:36,548 INFO L87 Difference]: Start difference. First operand 15813 states and 23962 transitions. Second operand 4 states. [2020-10-28 00:29:36,906 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-28 00:29:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:39,438 INFO L93 Difference]: Finished difference Result 42984 states and 65172 transitions. [2020-10-28 00:29:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:29:39,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-28 00:29:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:39,478 INFO L225 Difference]: With dead ends: 42984 [2020-10-28 00:29:39,478 INFO L226 Difference]: Without dead ends: 27291 [2020-10-28 00:29:39,501 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 00:29:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27291 states. [2020-10-28 00:29:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 27244. [2020-10-28 00:29:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27244 states. [2020-10-28 00:29:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 41262 transitions. [2020-10-28 00:29:41,753 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 41262 transitions. Word has length 108 [2020-10-28 00:29:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:41,753 INFO L481 AbstractCegarLoop]: Abstraction has 27244 states and 41262 transitions. [2020-10-28 00:29:41,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 41262 transitions. [2020-10-28 00:29:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:29:41,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:41,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:41,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:29:41,756 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 120430102, now seen corresponding path program 1 times [2020-10-28 00:29:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128857302] [2020-10-28 00:29:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:41,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:41,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:42,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:42,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:42,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:29:46,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 00:29:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:29:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:47,138 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:29:47,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:29:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:47,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:29:47,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:29:47,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:29:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 00:29:47,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:29:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:29:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:29:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:29:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:29:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:29:47,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128857302] [2020-10-28 00:29:47,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:29:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:29:47,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982331774] [2020-10-28 00:29:47,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:29:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:29:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:29:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:29:47,169 INFO L87 Difference]: Start difference. First operand 27244 states and 41262 transitions. Second operand 4 states. [2020-10-28 00:29:47,539 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-28 00:29:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:29:52,363 INFO L93 Difference]: Finished difference Result 79575 states and 120282 transitions. [2020-10-28 00:29:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:29:52,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-28 00:29:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:29:52,436 INFO L225 Difference]: With dead ends: 79575 [2020-10-28 00:29:52,436 INFO L226 Difference]: Without dead ends: 52412 [2020-10-28 00:29:52,459 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 00:29:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52412 states. [2020-10-28 00:29:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52412 to 52409. [2020-10-28 00:29:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52409 states. [2020-10-28 00:29:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52409 states to 52409 states and 78567 transitions. [2020-10-28 00:29:56,840 INFO L78 Accepts]: Start accepts. Automaton has 52409 states and 78567 transitions. Word has length 109 [2020-10-28 00:29:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:29:56,840 INFO L481 AbstractCegarLoop]: Abstraction has 52409 states and 78567 transitions. [2020-10-28 00:29:56,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:29:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52409 states and 78567 transitions. [2020-10-28 00:29:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 00:29:56,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:29:56,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:29:56,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 00:29:56,844 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:29:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:29:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1086146912, now seen corresponding path program 1 times [2020-10-28 00:29:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:29:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917083036] [2020-10-28 00:29:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:29:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:29:56,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:29:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:01,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:30:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:02,237 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-28 00:30:02,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:30:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:30:02,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:30:02,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:30:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:30:02,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:30:02,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:30:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:30:02,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917083036] [2020-10-28 00:30:02,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:30:02,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:30:02,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372139637] [2020-10-28 00:30:02,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:30:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:30:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:30:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:30:02,268 INFO L87 Difference]: Start difference. First operand 52409 states and 78567 transitions. Second operand 4 states. [2020-10-28 00:30:02,643 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 200