/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=SHALLOWEST --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_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:12:10,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:12:10,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:12:10,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:12:10,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:12:10,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:12:10,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:12:10,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:12:10,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:12:10,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:12:10,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:12:10,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:12:10,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:12:10,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:12:10,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:12:10,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:12:10,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:12:10,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:12:10,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:12:10,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:12:10,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:12:10,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:12:10,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:12:10,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:12:10,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:12:10,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:12:10,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:12:10,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:12:10,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:12:10,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:12:10,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:12:10,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:12:10,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:12:10,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:12:10,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:12:10,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:12:10,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:12:10,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:12:10,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:12:10,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:12:10,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:12:10,193 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 [2020-10-27 05:12:10,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:12:10,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:12:10,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:12:10,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:12:10,245 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:12:10,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:12:10,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:12:10,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:12:10,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:12:10,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:12:10,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:12:10,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:12:10,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:12:10,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:12:10,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:12:10,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:12:10,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:12:10,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:12:10,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:12:10,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:12:10,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:12:10,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:12:10,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:12:10,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:12:10,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:12:10,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:12:10,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:12:10,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:12:10,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:12:10,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:12:10,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:12:10,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:12:10,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:12:10,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:12:10,651 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:12:10,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:12:10,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/214fa4bcf/46c4443640a5444d8bbaab7e80937ee4/FLAG2274f2c2c [2020-10-27 05:12:11,442 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:12:11,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:12:11,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/214fa4bcf/46c4443640a5444d8bbaab7e80937ee4/FLAG2274f2c2c [2020-10-27 05:12:11,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/214fa4bcf/46c4443640a5444d8bbaab7e80937ee4 [2020-10-27 05:12:11,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:12:11,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:12:11,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:11,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:12:11,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:12:11,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:11" (1/1) ... [2020-10-27 05:12:11,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57907db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:11, skipping insertion in model container [2020-10-27 05:12:11,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:12:11" (1/1) ... [2020-10-27 05:12:11,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:12:11,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:12:12,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:12,364 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:12:12,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:12:12,544 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:12:12,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12 WrapperNode [2020-10-27 05:12:12,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:12:12,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:12:12,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:12:12,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:12:12,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (1/1) ... [2020-10-27 05:12:12,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:12:12,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:12:12,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:12:12,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:12:12,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (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 [2020-10-27 05:12:12,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:12:12,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:12:12,727 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:12:12,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:12:12,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:12:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:12:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:12:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:12:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:12:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:12:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:12:12,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:12:13,698 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:12:13,699 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:12:13,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:13 BoogieIcfgContainer [2020-10-27 05:12:13,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:12:13,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:12:13,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:12:13,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:12:13,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:12:11" (1/3) ... [2020-10-27 05:12:13,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268fbaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:13, skipping insertion in model container [2020-10-27 05:12:13,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:12:12" (2/3) ... [2020-10-27 05:12:13,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268fbaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:12:13, skipping insertion in model container [2020-10-27 05:12:13,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:12:13" (3/3) ... [2020-10-27 05:12:13,710 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:12:13,722 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:12:13,728 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:12:13,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:12:13,792 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:12:13,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:12:13,793 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:12:13,793 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:12:13,793 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:12:13,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:12:13,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:12:13,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:12:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-27 05:12:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 05:12:13,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:13,829 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] [2020-10-27 05:12:13,829 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-27 05:12:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:13,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793610210] [2020-10-27 05:12:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:14,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:19,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 05:12:19,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:12:19,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:12:19,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:12:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:19,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:12:19,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:12:19,720 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:19,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 05:12:19,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:19,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:19,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793610210] [2020-10-27 05:12:19,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:12:19,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052102915] [2020-10-27 05:12:19,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:12:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:12:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:12:19,888 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 6 states. [2020-10-27 05:12:20,251 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:21,447 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:21,728 INFO L93 Difference]: Finished difference Result 414 states and 700 transitions. [2020-10-27 05:12:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:12:21,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-27 05:12:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:21,741 INFO L225 Difference]: With dead ends: 414 [2020-10-27 05:12:21,742 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 05:12:21,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 05:12:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 229. [2020-10-27 05:12:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 05:12:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2020-10-27 05:12:21,829 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 51 [2020-10-27 05:12:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:21,830 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2020-10-27 05:12:21,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:12:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2020-10-27 05:12:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:12:21,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:21,833 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] [2020-10-27 05:12:21,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:12:21,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash -2094149536, now seen corresponding path program 1 times [2020-10-27 05:12:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:21,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807850104] [2020-10-27 05:12:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:21,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:22,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:26,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:12:26,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:12:26,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:12:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:27,392 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:27,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:27,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:27,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:12:27,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:27,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807850104] [2020-10-27 05:12:27,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:27,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:27,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895451686] [2020-10-27 05:12:27,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:27,475 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand 11 states. [2020-10-27 05:12:28,020 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2020-10-27 05:12:29,287 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:29,674 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:12:30,125 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 174 [2020-10-27 05:12:31,211 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:31,693 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 183 [2020-10-27 05:12:31,891 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:12:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:32,080 INFO L93 Difference]: Finished difference Result 1545 states and 2306 transitions. [2020-10-27 05:12:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:12:32,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 05:12:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:32,095 INFO L225 Difference]: With dead ends: 1545 [2020-10-27 05:12:32,095 INFO L226 Difference]: Without dead ends: 1431 [2020-10-27 05:12:32,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:12:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-10-27 05:12:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 235. [2020-10-27 05:12:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 05:12:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 309 transitions. [2020-10-27 05:12:32,156 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 309 transitions. Word has length 52 [2020-10-27 05:12:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:32,157 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 309 transitions. [2020-10-27 05:12:32,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 309 transitions. [2020-10-27 05:12:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:12:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:32,160 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] [2020-10-27 05:12:32,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:12:32,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 725720351, now seen corresponding path program 1 times [2020-10-27 05:12:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:32,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523678737] [2020-10-27 05:12:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:12:37,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:12:37,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:12:37,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:37,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:12:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:12:37,440 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:37,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:37,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:37,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:37,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:37,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:12:37,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:37,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523678737] [2020-10-27 05:12:37,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:37,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:12:37,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530970026] [2020-10-27 05:12:37,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:37,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:37,508 INFO L87 Difference]: Start difference. First operand 235 states and 309 transitions. Second operand 9 states. [2020-10-27 05:12:37,750 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:12:38,514 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:38,817 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:39,067 INFO L93 Difference]: Finished difference Result 426 states and 579 transitions. [2020-10-27 05:12:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:12:39,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 05:12:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:39,069 INFO L225 Difference]: With dead ends: 426 [2020-10-27 05:12:39,070 INFO L226 Difference]: Without dead ends: 298 [2020-10-27 05:12:39,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:12:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-27 05:12:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 235. [2020-10-27 05:12:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 05:12:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 307 transitions. [2020-10-27 05:12:39,100 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 307 transitions. Word has length 52 [2020-10-27 05:12:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:39,100 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 307 transitions. [2020-10-27 05:12:39,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 307 transitions. [2020-10-27 05:12:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:39,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:39,103 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] [2020-10-27 05:12:39,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:12:39,103 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1306243887, now seen corresponding path program 1 times [2020-10-27 05:12:39,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:39,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090229384] [2020-10-27 05:12:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:39,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:42,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:12:44,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:44,423 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:44,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:44,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:44,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:44,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:44,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:44,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090229384] [2020-10-27 05:12:44,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:12:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702003740] [2020-10-27 05:12:44,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:12:44,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:12:44,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:12:44,506 INFO L87 Difference]: Start difference. First operand 235 states and 307 transitions. Second operand 9 states. [2020-10-27 05:12:44,737 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:12:45,601 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:12:46,119 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:12:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:46,189 INFO L93 Difference]: Finished difference Result 465 states and 652 transitions. [2020-10-27 05:12:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:12:46,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 05:12:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:46,192 INFO L225 Difference]: With dead ends: 465 [2020-10-27 05:12:46,192 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 05:12:46,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:12:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 05:12:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 251. [2020-10-27 05:12:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 05:12:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 328 transitions. [2020-10-27 05:12:46,223 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 328 transitions. Word has length 53 [2020-10-27 05:12:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:46,223 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 328 transitions. [2020-10-27 05:12:46,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:12:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 328 transitions. [2020-10-27 05:12:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:12:46,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:46,225 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] [2020-10-27 05:12:46,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:12:46,226 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1406790542, now seen corresponding path program 1 times [2020-10-27 05:12:46,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:46,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963618022] [2020-10-27 05:12:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:46,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:49,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:12:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:12:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:51,697 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:12:51,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:51,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:51,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:51,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:51,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963618022] [2020-10-27 05:12:51,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:51,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:12:51,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900914520] [2020-10-27 05:12:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:12:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:12:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:12:51,758 INFO L87 Difference]: Start difference. First operand 251 states and 328 transitions. Second operand 12 states. [2020-10-27 05:12:52,295 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 184 [2020-10-27 05:12:53,926 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 174 [2020-10-27 05:12:54,393 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 181 [2020-10-27 05:12:54,717 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:12:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:55,922 INFO L93 Difference]: Finished difference Result 924 states and 1320 transitions. [2020-10-27 05:12:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:12:55,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 05:12:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:55,928 INFO L225 Difference]: With dead ends: 924 [2020-10-27 05:12:55,928 INFO L226 Difference]: Without dead ends: 830 [2020-10-27 05:12:55,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:12:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2020-10-27 05:12:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 251. [2020-10-27 05:12:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 05:12:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2020-10-27 05:12:55,967 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 53 [2020-10-27 05:12:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:55,968 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2020-10-27 05:12:55,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:12:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2020-10-27 05:12:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:12:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:55,969 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] [2020-10-27 05:12:55,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:12:55,970 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1614820578, now seen corresponding path program 1 times [2020-10-27 05:12:55,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:55,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399623328] [2020-10-27 05:12:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:56,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:57,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:59,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:01,256 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:01,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:01,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:01,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:01,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:01,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:01,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399623328] [2020-10-27 05:13:01,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:01,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:01,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574998423] [2020-10-27 05:13:01,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:13:01,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:01,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:13:01,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:01,323 INFO L87 Difference]: Start difference. First operand 251 states and 327 transitions. Second operand 9 states. [2020-10-27 05:13:01,538 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:02,343 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:02,841 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:02,895 INFO L93 Difference]: Finished difference Result 385 states and 520 transitions. [2020-10-27 05:13:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:13:02,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-27 05:13:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:02,904 INFO L225 Difference]: With dead ends: 385 [2020-10-27 05:13:02,904 INFO L226 Difference]: Without dead ends: 380 [2020-10-27 05:13:02,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:13:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-27 05:13:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 267. [2020-10-27 05:13:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 05:13:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 349 transitions. [2020-10-27 05:13:02,944 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 349 transitions. Word has length 54 [2020-10-27 05:13:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:02,944 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 349 transitions. [2020-10-27 05:13:02,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:13:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 349 transitions. [2020-10-27 05:13:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:13:02,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:02,946 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] [2020-10-27 05:13:02,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:13:02,946 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -774726588, now seen corresponding path program 1 times [2020-10-27 05:13:02,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466563389] [2020-10-27 05:13:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:05,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:07,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:07,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:13:07,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:07,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:07,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:13:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:07,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:13:07,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:08,325 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:08,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:08,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466563389] [2020-10-27 05:13:08,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:08,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:13:08,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053802748] [2020-10-27 05:13:08,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:13:08,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:08,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:13:08,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:08,370 INFO L87 Difference]: Start difference. First operand 267 states and 349 transitions. Second operand 13 states. [2020-10-27 05:13:08,679 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:13:09,968 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:13:10,190 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:10,504 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:11,533 INFO L93 Difference]: Finished difference Result 781 states and 1110 transitions. [2020-10-27 05:13:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:13:11,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-27 05:13:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:11,537 INFO L225 Difference]: With dead ends: 781 [2020-10-27 05:13:11,538 INFO L226 Difference]: Without dead ends: 677 [2020-10-27 05:13:11,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:13:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-10-27 05:13:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 267. [2020-10-27 05:13:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 05:13:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 347 transitions. [2020-10-27 05:13:11,579 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 347 transitions. Word has length 54 [2020-10-27 05:13:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:11,579 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 347 transitions. [2020-10-27 05:13:11,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:13:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 347 transitions. [2020-10-27 05:13:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:13:11,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:11,581 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] [2020-10-27 05:13:11,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:13:11,581 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -431244799, now seen corresponding path program 1 times [2020-10-27 05:13:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:11,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042838539] [2020-10-27 05:13:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:11,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,225 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:17,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:17,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:17,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:17,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:17,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:17,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:17,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042838539] [2020-10-27 05:13:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:17,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:13:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128052435] [2020-10-27 05:13:17,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:13:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:17,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:13:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:13:17,290 INFO L87 Difference]: Start difference. First operand 267 states and 347 transitions. Second operand 17 states. [2020-10-27 05:13:17,664 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:13:19,677 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:20,001 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:13:20,246 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:13:20,545 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:13:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:22,141 INFO L93 Difference]: Finished difference Result 898 states and 1273 transitions. [2020-10-27 05:13:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:13:22,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-27 05:13:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:22,146 INFO L225 Difference]: With dead ends: 898 [2020-10-27 05:13:22,146 INFO L226 Difference]: Without dead ends: 892 [2020-10-27 05:13:22,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=363, Invalid=1359, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:13:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-10-27 05:13:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 267. [2020-10-27 05:13:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-27 05:13:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 346 transitions. [2020-10-27 05:13:22,193 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 346 transitions. Word has length 54 [2020-10-27 05:13:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:22,194 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 346 transitions. [2020-10-27 05:13:22,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:13:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 346 transitions. [2020-10-27 05:13:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:13:22,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:22,195 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] [2020-10-27 05:13:22,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:13:22,195 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:22,196 INFO L82 PathProgramCache]: Analyzing trace with hash 719050979, now seen corresponding path program 1 times [2020-10-27 05:13:22,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:22,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444389805] [2020-10-27 05:13:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:22,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:25,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:27,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:27,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:27,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:13:27,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:27,460 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:27,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:27,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:27,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:27,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444389805] [2020-10-27 05:13:27,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:27,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456759291] [2020-10-27 05:13:27,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:27,503 INFO L87 Difference]: Start difference. First operand 267 states and 346 transitions. Second operand 6 states. [2020-10-27 05:13:27,731 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:28,436 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:28,730 INFO L93 Difference]: Finished difference Result 543 states and 738 transitions. [2020-10-27 05:13:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:28,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:13:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:28,733 INFO L225 Difference]: With dead ends: 543 [2020-10-27 05:13:28,733 INFO L226 Difference]: Without dead ends: 373 [2020-10-27 05:13:28,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:13:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-27 05:13:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 347. [2020-10-27 05:13:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-27 05:13:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 473 transitions. [2020-10-27 05:13:28,798 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 473 transitions. Word has length 55 [2020-10-27 05:13:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:28,798 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 473 transitions. [2020-10-27 05:13:28,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 473 transitions. [2020-10-27 05:13:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:28,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:28,799 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] [2020-10-27 05:13:28,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:13:28,800 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash -291952864, now seen corresponding path program 1 times [2020-10-27 05:13:28,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:28,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503404152] [2020-10-27 05:13:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:28,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:29,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:29,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:29,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:13:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:29,905 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:29,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:29,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:29,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503404152] [2020-10-27 05:13:29,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:29,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:13:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384906490] [2020-10-27 05:13:29,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:13:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:29,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:13:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:13:29,940 INFO L87 Difference]: Start difference. First operand 347 states and 473 transitions. Second operand 6 states. [2020-10-27 05:13:30,161 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:30,743 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:31,183 INFO L93 Difference]: Finished difference Result 785 states and 1101 transitions. [2020-10-27 05:13:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:13:31,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 05:13:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:31,187 INFO L225 Difference]: With dead ends: 785 [2020-10-27 05:13:31,187 INFO L226 Difference]: Without dead ends: 523 [2020-10-27 05:13:31,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:13:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-27 05:13:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 507. [2020-10-27 05:13:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-27 05:13:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 713 transitions. [2020-10-27 05:13:31,284 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 713 transitions. Word has length 56 [2020-10-27 05:13:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:31,284 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 713 transitions. [2020-10-27 05:13:31,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:13:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 713 transitions. [2020-10-27 05:13:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:31,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:31,286 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] [2020-10-27 05:13:31,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:13:31,286 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1876796794, now seen corresponding path program 1 times [2020-10-27 05:13:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:31,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331210495] [2020-10-27 05:13:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:13:33,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,619 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:33,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331210495] [2020-10-27 05:13:33,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:33,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:13:33,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858053096] [2020-10-27 05:13:33,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:13:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:13:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:13:33,657 INFO L87 Difference]: Start difference. First operand 507 states and 713 transitions. Second operand 8 states. [2020-10-27 05:13:33,899 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:13:34,779 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 177 [2020-10-27 05:13:35,040 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:13:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:35,338 INFO L93 Difference]: Finished difference Result 990 states and 1452 transitions. [2020-10-27 05:13:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:13:35,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:13:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:35,341 INFO L225 Difference]: With dead ends: 990 [2020-10-27 05:13:35,341 INFO L226 Difference]: Without dead ends: 637 [2020-10-27 05:13:35,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:13:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-10-27 05:13:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 469. [2020-10-27 05:13:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 05:13:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 662 transitions. [2020-10-27 05:13:35,454 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 662 transitions. Word has length 56 [2020-10-27 05:13:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:35,455 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 662 transitions. [2020-10-27 05:13:35,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:13:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 662 transitions. [2020-10-27 05:13:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:35,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:35,456 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] [2020-10-27 05:13:35,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:13:35,456 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 867709920, now seen corresponding path program 1 times [2020-10-27 05:13:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:35,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172264812] [2020-10-27 05:13:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:35,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:38,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:38,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:13:38,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2721 [2020-10-27 05:13:38,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:13:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:13:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:38,650 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:13:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:38,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172264812] [2020-10-27 05:13:38,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:38,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:13:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232748103] [2020-10-27 05:13:38,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:13:38,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:13:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:13:38,683 INFO L87 Difference]: Start difference. First operand 469 states and 662 transitions. Second operand 13 states. [2020-10-27 05:13:38,932 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:13:40,060 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:13:40,306 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:13:40,596 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:13:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:41,198 INFO L93 Difference]: Finished difference Result 735 states and 1056 transitions. [2020-10-27 05:13:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:13:41,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 05:13:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:41,202 INFO L225 Difference]: With dead ends: 735 [2020-10-27 05:13:41,202 INFO L226 Difference]: Without dead ends: 730 [2020-10-27 05:13:41,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:13:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-10-27 05:13:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 466. [2020-10-27 05:13:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 05:13:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 658 transitions. [2020-10-27 05:13:41,321 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 658 transitions. Word has length 56 [2020-10-27 05:13:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:41,322 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 658 transitions. [2020-10-27 05:13:41,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:13:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 658 transitions. [2020-10-27 05:13:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:41,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:41,323 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] [2020-10-27 05:13:41,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:13:41,323 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 368085089, now seen corresponding path program 1 times [2020-10-27 05:13:41,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:41,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75139869] [2020-10-27 05:13:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:43,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2583 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:43,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:43,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:44,226 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:44,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:44,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:44,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:44,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:44,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:44,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75139869] [2020-10-27 05:13:44,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:44,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:44,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745266180] [2020-10-27 05:13:44,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:44,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:44,287 INFO L87 Difference]: Start difference. First operand 466 states and 658 transitions. Second operand 11 states. [2020-10-27 05:13:44,511 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:13:45,403 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:45,614 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:47,132 INFO L93 Difference]: Finished difference Result 1866 states and 2736 transitions. [2020-10-27 05:13:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:13:47,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:13:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:47,140 INFO L225 Difference]: With dead ends: 1866 [2020-10-27 05:13:47,140 INFO L226 Difference]: Without dead ends: 1527 [2020-10-27 05:13:47,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:13:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-10-27 05:13:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 466. [2020-10-27 05:13:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 05:13:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 657 transitions. [2020-10-27 05:13:47,295 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 657 transitions. Word has length 57 [2020-10-27 05:13:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:47,295 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 657 transitions. [2020-10-27 05:13:47,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 657 transitions. [2020-10-27 05:13:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:13:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:47,297 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] [2020-10-27 05:13:47,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:13:47,297 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1067713812, now seen corresponding path program 1 times [2020-10-27 05:13:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:47,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336685287] [2020-10-27 05:13:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:47,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:52,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:52,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:52,723 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:52,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:52,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:52,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:52,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336685287] [2020-10-27 05:13:52,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:52,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:13:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292614495] [2020-10-27 05:13:52,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:13:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:13:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:13:52,764 INFO L87 Difference]: Start difference. First operand 466 states and 657 transitions. Second operand 15 states. [2020-10-27 05:13:53,379 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 188 [2020-10-27 05:13:54,562 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:13:54,809 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:13:55,046 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:13:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:55,839 INFO L93 Difference]: Finished difference Result 907 states and 1273 transitions. [2020-10-27 05:13:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:13:55,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 05:13:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:55,843 INFO L225 Difference]: With dead ends: 907 [2020-10-27 05:13:55,843 INFO L226 Difference]: Without dead ends: 899 [2020-10-27 05:13:55,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 05:13:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-27 05:13:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 468. [2020-10-27 05:13:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-27 05:13:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 659 transitions. [2020-10-27 05:13:55,971 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 659 transitions. Word has length 57 [2020-10-27 05:13:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:55,971 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 659 transitions. [2020-10-27 05:13:55,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:13:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 659 transitions. [2020-10-27 05:13:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:13:55,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:55,972 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] [2020-10-27 05:13:55,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:13:55,972 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1875712707, now seen corresponding path program 1 times [2020-10-27 05:13:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:55,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715818796] [2020-10-27 05:13:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:13:58,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:13:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2575 [2020-10-27 05:13:58,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:13:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:13:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,154 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:13:59,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:59,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715818796] [2020-10-27 05:13:59,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:59,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:13:59,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479433942] [2020-10-27 05:13:59,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:13:59,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:13:59,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:13:59,201 INFO L87 Difference]: Start difference. First operand 468 states and 659 transitions. Second operand 17 states. [2020-10-27 05:13:59,883 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 197 [2020-10-27 05:14:02,239 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 182 [2020-10-27 05:14:02,473 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:14:02,981 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 183 [2020-10-27 05:14:03,449 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 177 [2020-10-27 05:14:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:04,899 INFO L93 Difference]: Finished difference Result 2487 states and 3752 transitions. [2020-10-27 05:14:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 05:14:04,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-27 05:14:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:04,906 INFO L225 Difference]: With dead ends: 2487 [2020-10-27 05:14:04,906 INFO L226 Difference]: Without dead ends: 2159 [2020-10-27 05:14:04,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=382, Invalid=1424, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:14:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-10-27 05:14:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 472. [2020-10-27 05:14:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-27 05:14:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 664 transitions. [2020-10-27 05:14:05,055 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 664 transitions. Word has length 58 [2020-10-27 05:14:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:05,055 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 664 transitions. [2020-10-27 05:14:05,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:14:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 664 transitions. [2020-10-27 05:14:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:05,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:05,056 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] [2020-10-27 05:14:05,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:14:05,057 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:05,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1176083984, now seen corresponding path program 1 times [2020-10-27 05:14:05,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:05,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198490256] [2020-10-27 05:14:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4782 [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:14:09,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:09,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:14:09,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,397 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:10,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:10,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:10,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198490256] [2020-10-27 05:14:10,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:10,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:14:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896723381] [2020-10-27 05:14:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:14:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:14:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:14:10,444 INFO L87 Difference]: Start difference. First operand 472 states and 664 transitions. Second operand 17 states. [2020-10-27 05:14:11,142 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 193 [2020-10-27 05:14:12,729 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:14:13,023 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:13,326 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:13,906 INFO L93 Difference]: Finished difference Result 638 states and 891 transitions. [2020-10-27 05:14:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:14:13,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-27 05:14:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:13,909 INFO L225 Difference]: With dead ends: 638 [2020-10-27 05:14:13,909 INFO L226 Difference]: Without dead ends: 630 [2020-10-27 05:14:13,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 05:14:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-10-27 05:14:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 470. [2020-10-27 05:14:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-27 05:14:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 661 transitions. [2020-10-27 05:14:14,034 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 661 transitions. Word has length 58 [2020-10-27 05:14:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:14,034 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 661 transitions. [2020-10-27 05:14:14,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:14:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 661 transitions. [2020-10-27 05:14:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:14,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:14,036 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] [2020-10-27 05:14:14,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:14:14,036 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash 795371964, now seen corresponding path program 1 times [2020-10-27 05:14:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:14,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62510959] [2020-10-27 05:14:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:15,564 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:15,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:15,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:15,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:15,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62510959] [2020-10-27 05:14:15,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:15,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:15,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740208314] [2020-10-27 05:14:15,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:15,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:15,595 INFO L87 Difference]: Start difference. First operand 470 states and 661 transitions. Second operand 15 states. [2020-10-27 05:14:15,994 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:14:17,243 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:17,515 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:14:17,806 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:19,234 INFO L93 Difference]: Finished difference Result 1398 states and 2052 transitions. [2020-10-27 05:14:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:19,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-27 05:14:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:19,239 INFO L225 Difference]: With dead ends: 1398 [2020-10-27 05:14:19,239 INFO L226 Difference]: Without dead ends: 1391 [2020-10-27 05:14:19,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:14:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-10-27 05:14:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 470. [2020-10-27 05:14:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-27 05:14:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 660 transitions. [2020-10-27 05:14:19,357 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 660 transitions. Word has length 59 [2020-10-27 05:14:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:19,358 INFO L481 AbstractCegarLoop]: Abstraction has 470 states and 660 transitions. [2020-10-27 05:14:19,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:14:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 660 transitions. [2020-10-27 05:14:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:19,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:19,359 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] [2020-10-27 05:14:19,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:14:19,359 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -113879204, now seen corresponding path program 1 times [2020-10-27 05:14:19,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:19,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120011139] [2020-10-27 05:14:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:20,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:20,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:14:20,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,752 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:20,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:20,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:20,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:20,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:20,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:20,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:20,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:20,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:20,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120011139] [2020-10-27 05:14:20,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:20,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:20,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814429506] [2020-10-27 05:14:20,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:20,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:20,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:20,779 INFO L87 Difference]: Start difference. First operand 470 states and 660 transitions. Second operand 9 states. [2020-10-27 05:14:21,024 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:14:21,645 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:14:21,838 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:14:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:22,181 INFO L93 Difference]: Finished difference Result 638 states and 912 transitions. [2020-10-27 05:14:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:14:22,182 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 05:14:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:22,184 INFO L225 Difference]: With dead ends: 638 [2020-10-27 05:14:22,184 INFO L226 Difference]: Without dead ends: 625 [2020-10-27 05:14:22,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:14:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-27 05:14:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 459. [2020-10-27 05:14:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 05:14:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 646 transitions. [2020-10-27 05:14:22,312 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 646 transitions. Word has length 59 [2020-10-27 05:14:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:22,312 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 646 transitions. [2020-10-27 05:14:22,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 646 transitions. [2020-10-27 05:14:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:14:22,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:22,313 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] [2020-10-27 05:14:22,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:14:22,313 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 579272600, now seen corresponding path program 1 times [2020-10-27 05:14:22,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:22,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125744139] [2020-10-27 05:14:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:22,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:14:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:23,093 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:23,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:23,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:23,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:23,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125744139] [2020-10-27 05:14:23,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:23,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798371222] [2020-10-27 05:14:23,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:23,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:23,122 INFO L87 Difference]: Start difference. First operand 459 states and 646 transitions. Second operand 9 states. [2020-10-27 05:14:23,373 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:24,258 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:14:24,480 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:14:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:24,519 INFO L93 Difference]: Finished difference Result 620 states and 889 transitions. [2020-10-27 05:14:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:14:24,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-27 05:14:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:24,523 INFO L225 Difference]: With dead ends: 620 [2020-10-27 05:14:24,523 INFO L226 Difference]: Without dead ends: 613 [2020-10-27 05:14:24,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:14:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2020-10-27 05:14:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 454. [2020-10-27 05:14:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-27 05:14:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 638 transitions. [2020-10-27 05:14:24,666 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 638 transitions. Word has length 60 [2020-10-27 05:14:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:24,667 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 638 transitions. [2020-10-27 05:14:24,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 638 transitions. [2020-10-27 05:14:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:14:24,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:24,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:24,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:14:24,669 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1239929659, now seen corresponding path program 1 times [2020-10-27 05:14:24,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:24,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291607615] [2020-10-27 05:14:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:24,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:26,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:29,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:29,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:29,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:29,997 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:29,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:30,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:30,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:14:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:30,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291607615] [2020-10-27 05:14:30,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:30,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110167909] [2020-10-27 05:14:30,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:30,086 INFO L87 Difference]: Start difference. First operand 454 states and 638 transitions. Second operand 10 states. [2020-10-27 05:14:30,417 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:14:31,705 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:31,942 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:14:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:31,971 INFO L93 Difference]: Finished difference Result 951 states and 1391 transitions. [2020-10-27 05:14:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:31,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-10-27 05:14:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:31,975 INFO L225 Difference]: With dead ends: 951 [2020-10-27 05:14:31,975 INFO L226 Difference]: Without dead ends: 619 [2020-10-27 05:14:31,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:14:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-27 05:14:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 450. [2020-10-27 05:14:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 05:14:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 632 transitions. [2020-10-27 05:14:32,102 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 632 transitions. Word has length 76 [2020-10-27 05:14:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:32,102 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 632 transitions. [2020-10-27 05:14:32,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 632 transitions. [2020-10-27 05:14:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 05:14:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:32,103 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] [2020-10-27 05:14:32,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:14:32,104 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1275383932, now seen corresponding path program 1 times [2020-10-27 05:14:32,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:32,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631634337] [2020-10-27 05:14:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:32,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:36,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:36,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 05:14:36,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:14:36,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4309 [2020-10-27 05:14:36,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:14:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:36,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:14:36,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:36,801 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:36,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631634337] [2020-10-27 05:14:36,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:36,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:14:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435390488] [2020-10-27 05:14:36,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:14:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:36,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:14:36,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:14:36,861 INFO L87 Difference]: Start difference. First operand 450 states and 632 transitions. Second operand 12 states. [2020-10-27 05:14:37,438 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 183 [2020-10-27 05:14:40,970 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 181 [2020-10-27 05:14:41,263 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:14:41,850 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 186 [2020-10-27 05:14:42,170 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:14:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:42,884 INFO L93 Difference]: Finished difference Result 3154 states and 4620 transitions. [2020-10-27 05:14:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:14:42,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-27 05:14:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:42,894 INFO L225 Difference]: With dead ends: 3154 [2020-10-27 05:14:42,894 INFO L226 Difference]: Without dead ends: 2827 [2020-10-27 05:14:42,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:14:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2020-10-27 05:14:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 450. [2020-10-27 05:14:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 05:14:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 630 transitions. [2020-10-27 05:14:43,102 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 630 transitions. Word has length 77 [2020-10-27 05:14:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:43,103 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 630 transitions. [2020-10-27 05:14:43,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:14:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 630 transitions. [2020-10-27 05:14:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:14:43,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:43,104 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] [2020-10-27 05:14:43,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 05:14:43,104 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash -425053307, now seen corresponding path program 1 times [2020-10-27 05:14:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:43,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166835854] [2020-10-27 05:14:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:43,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4622 [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:14:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:47,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:14:47,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:48,040 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:48,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166835854] [2020-10-27 05:14:48,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:48,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:14:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489605506] [2020-10-27 05:14:48,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:14:48,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:14:48,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:14:48,082 INFO L87 Difference]: Start difference. First operand 450 states and 630 transitions. Second operand 10 states. [2020-10-27 05:14:48,340 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:49,697 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:14:50,185 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 173 [2020-10-27 05:14:50,409 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:14:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:50,540 INFO L93 Difference]: Finished difference Result 1243 states and 1848 transitions. [2020-10-27 05:14:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:14:50,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-27 05:14:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:50,547 INFO L225 Difference]: With dead ends: 1243 [2020-10-27 05:14:50,547 INFO L226 Difference]: Without dead ends: 916 [2020-10-27 05:14:50,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:14:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-27 05:14:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 450. [2020-10-27 05:14:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 05:14:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 628 transitions. [2020-10-27 05:14:50,665 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 628 transitions. Word has length 78 [2020-10-27 05:14:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:50,666 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 628 transitions. [2020-10-27 05:14:50,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:14:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 628 transitions. [2020-10-27 05:14:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 05:14:50,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:50,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:50,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 05:14:50,668 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:50,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1438209585, now seen corresponding path program 1 times [2020-10-27 05:14:50,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:50,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172396941] [2020-10-27 05:14:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:14:55,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:56,430 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:14:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:56,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:56,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:56,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:56,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:14:56,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172396941] [2020-10-27 05:14:56,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:56,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435529246] [2020-10-27 05:14:56,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:56,503 INFO L87 Difference]: Start difference. First operand 450 states and 628 transitions. Second operand 15 states. [2020-10-27 05:14:56,673 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 05:14:57,339 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2020-10-27 05:14:57,728 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 05:15:00,298 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:15:00,583 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:15:00,849 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:15:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:00,966 INFO L93 Difference]: Finished difference Result 1362 states and 2027 transitions. [2020-10-27 05:15:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:15:00,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-10-27 05:15:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:00,970 INFO L225 Difference]: With dead ends: 1362 [2020-10-27 05:15:00,970 INFO L226 Difference]: Without dead ends: 1040 [2020-10-27 05:15:00,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:15:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-10-27 05:15:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 443. [2020-10-27 05:15:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-27 05:15:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 620 transitions. [2020-10-27 05:15:01,107 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 620 transitions. Word has length 79 [2020-10-27 05:15:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:01,108 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 620 transitions. [2020-10-27 05:15:01,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:15:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 620 transitions. [2020-10-27 05:15:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:15:01,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:01,109 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] [2020-10-27 05:15:01,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 05:15:01,109 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1747871245, now seen corresponding path program 1 times [2020-10-27 05:15:01,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:01,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394892689] [2020-10-27 05:15:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:01,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1215 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 05:15:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:02,564 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:02,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:02,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:02,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:02,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394892689] [2020-10-27 05:15:02,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:02,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:15:02,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800593508] [2020-10-27 05:15:02,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:02,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:02,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:02,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:02,599 INFO L87 Difference]: Start difference. First operand 443 states and 620 transitions. Second operand 6 states. [2020-10-27 05:15:02,853 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:03,765 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:15:03,975 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:15:04,256 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:15:04,493 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:15:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:04,760 INFO L93 Difference]: Finished difference Result 2333 states and 3536 transitions. [2020-10-27 05:15:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:15:04,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-27 05:15:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:04,769 INFO L225 Difference]: With dead ends: 2333 [2020-10-27 05:15:04,769 INFO L226 Difference]: Without dead ends: 2018 [2020-10-27 05:15:04,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:15:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-10-27 05:15:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 755. [2020-10-27 05:15:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-10-27 05:15:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1088 transitions. [2020-10-27 05:15:05,009 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1088 transitions. Word has length 80 [2020-10-27 05:15:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:05,009 INFO L481 AbstractCegarLoop]: Abstraction has 755 states and 1088 transitions. [2020-10-27 05:15:05,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1088 transitions. [2020-10-27 05:15:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:05,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:05,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:05,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 05:15:05,011 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1916699429, now seen corresponding path program 1 times [2020-10-27 05:15:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344829982] [2020-10-27 05:15:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:06,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:10,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:15:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:10,357 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:10,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:10,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344829982] [2020-10-27 05:15:10,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:10,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:15:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482296620] [2020-10-27 05:15:10,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:15:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:15:10,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:15:10,405 INFO L87 Difference]: Start difference. First operand 755 states and 1088 transitions. Second operand 8 states. [2020-10-27 05:15:10,632 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:15:11,661 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:15:11,908 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:12,777 INFO L93 Difference]: Finished difference Result 3291 states and 4870 transitions. [2020-10-27 05:15:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:15:12,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-27 05:15:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:12,788 INFO L225 Difference]: With dead ends: 3291 [2020-10-27 05:15:12,788 INFO L226 Difference]: Without dead ends: 2664 [2020-10-27 05:15:12,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:15:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2020-10-27 05:15:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1475. [2020-10-27 05:15:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-10-27 05:15:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2168 transitions. [2020-10-27 05:15:13,288 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2168 transitions. Word has length 82 [2020-10-27 05:15:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:13,288 INFO L481 AbstractCegarLoop]: Abstraction has 1475 states and 2168 transitions. [2020-10-27 05:15:13,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:15:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2168 transitions. [2020-10-27 05:15:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:13,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:13,291 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] [2020-10-27 05:15:13,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 05:15:13,291 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 622087018, now seen corresponding path program 1 times [2020-10-27 05:15:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:13,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090249566] [2020-10-27 05:15:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:13,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:14,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:15:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:15:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:15:14,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:14,462 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:14,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:14,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:14,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:14,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090249566] [2020-10-27 05:15:14,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:14,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:15:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999257364] [2020-10-27 05:15:14,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:15:14,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:15:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:15:14,512 INFO L87 Difference]: Start difference. First operand 1475 states and 2168 transitions. Second operand 6 states. [2020-10-27 05:15:14,793 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:15:15,835 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:15:16,143 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:15:16,376 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:17,277 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:15:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:17,567 INFO L93 Difference]: Finished difference Result 5525 states and 8276 transitions. [2020-10-27 05:15:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:15:17,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:15:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:17,578 INFO L225 Difference]: With dead ends: 5525 [2020-10-27 05:15:17,578 INFO L226 Difference]: Without dead ends: 4178 [2020-10-27 05:15:17,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:15:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2020-10-27 05:15:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 1475. [2020-10-27 05:15:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-10-27 05:15:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2152 transitions. [2020-10-27 05:15:18,132 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2152 transitions. Word has length 82 [2020-10-27 05:15:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:18,132 INFO L481 AbstractCegarLoop]: Abstraction has 1475 states and 2152 transitions. [2020-10-27 05:15:18,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:15:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2152 transitions. [2020-10-27 05:15:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:18,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:18,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:18,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 05:15:18,135 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash 81106379, now seen corresponding path program 1 times [2020-10-27 05:15:18,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:18,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774347293] [2020-10-27 05:15:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:18,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:19,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:19,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:15:19,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-27 05:15:19,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:19,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:15:19,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:15:19,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:15:19,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:19,455 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:19,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:19,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:19,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:19,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:19,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:19,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774347293] [2020-10-27 05:15:19,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:19,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:15:19,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022238237] [2020-10-27 05:15:19,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:15:19,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:15:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:15:19,489 INFO L87 Difference]: Start difference. First operand 1475 states and 2152 transitions. Second operand 5 states. [2020-10-27 05:15:19,745 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:20,859 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:15:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:21,411 INFO L93 Difference]: Finished difference Result 3993 states and 5884 transitions. [2020-10-27 05:15:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:15:21,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-10-27 05:15:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:21,421 INFO L225 Difference]: With dead ends: 3993 [2020-10-27 05:15:21,421 INFO L226 Difference]: Without dead ends: 2646 [2020-10-27 05:15:21,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:15:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2020-10-27 05:15:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2611. [2020-10-27 05:15:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2611 states. [2020-10-27 05:15:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3752 transitions. [2020-10-27 05:15:22,356 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3752 transitions. Word has length 82 [2020-10-27 05:15:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:22,356 INFO L481 AbstractCegarLoop]: Abstraction has 2611 states and 3752 transitions. [2020-10-27 05:15:22,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:15:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3752 transitions. [2020-10-27 05:15:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:22,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:22,359 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] [2020-10-27 05:15:22,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 05:15:22,360 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1001086507, now seen corresponding path program 1 times [2020-10-27 05:15:22,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:22,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561003441] [2020-10-27 05:15:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:24,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:27,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:15:27,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:27,749 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:27,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:27,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561003441] [2020-10-27 05:15:27,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:27,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:15:27,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762560603] [2020-10-27 05:15:27,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:15:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:15:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:15:27,796 INFO L87 Difference]: Start difference. First operand 2611 states and 3752 transitions. Second operand 12 states. [2020-10-27 05:15:28,102 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:15:31,524 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:15:31,803 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:15:32,140 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:15:32,411 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:32,676 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:35,564 INFO L93 Difference]: Finished difference Result 10777 states and 15349 transitions. [2020-10-27 05:15:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 05:15:35,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-10-27 05:15:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:35,576 INFO L225 Difference]: With dead ends: 10777 [2020-10-27 05:15:35,576 INFO L226 Difference]: Without dead ends: 8294 [2020-10-27 05:15:35,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 05:15:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2020-10-27 05:15:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 2700. [2020-10-27 05:15:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2700 states. [2020-10-27 05:15:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 3886 transitions. [2020-10-27 05:15:36,662 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 3886 transitions. Word has length 82 [2020-10-27 05:15:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:36,663 INFO L481 AbstractCegarLoop]: Abstraction has 2700 states and 3886 transitions. [2020-10-27 05:15:36,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:15:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 3886 transitions. [2020-10-27 05:15:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:15:36,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:36,666 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] [2020-10-27 05:15:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 05:15:36,666 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash 802028049, now seen corresponding path program 1 times [2020-10-27 05:15:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324858213] [2020-10-27 05:15:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:37,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:41,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:15:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:15:41,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:42,000 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:15:42,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:42,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:42,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:42,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:15:42,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324858213] [2020-10-27 05:15:42,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:42,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:15:42,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189833979] [2020-10-27 05:15:42,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:15:42,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:15:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:15:42,045 INFO L87 Difference]: Start difference. First operand 2700 states and 3886 transitions. Second operand 11 states. [2020-10-27 05:15:42,314 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:15:44,754 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:15:45,025 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:15:45,300 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:15:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:48,043 INFO L93 Difference]: Finished difference Result 9290 states and 13186 transitions. [2020-10-27 05:15:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:15:48,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-27 05:15:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:48,057 INFO L225 Difference]: With dead ends: 9290 [2020-10-27 05:15:48,057 INFO L226 Difference]: Without dead ends: 6807 [2020-10-27 05:15:48,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:15:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2020-10-27 05:15:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 2810. [2020-10-27 05:15:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2020-10-27 05:15:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 4052 transitions. [2020-10-27 05:15:49,172 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 4052 transitions. Word has length 82 [2020-10-27 05:15:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:49,172 INFO L481 AbstractCegarLoop]: Abstraction has 2810 states and 4052 transitions. [2020-10-27 05:15:49,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:15:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 4052 transitions. [2020-10-27 05:15:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:15:49,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:49,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:49,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 05:15:49,174 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1889763896, now seen corresponding path program 1 times [2020-10-27 05:15:49,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:49,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414805474] [2020-10-27 05:15:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:49,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:49,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:52,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking...