/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-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:40:17,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:40:17,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:40:17,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:40:17,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:40:17,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:40:17,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:40:17,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:40:17,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:40:17,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:40:17,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:40:17,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:40:17,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:40:17,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:40:17,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:40:17,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:40:17,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:40:17,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:40:17,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:40:17,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:40:17,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:40:17,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:40:17,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:40:17,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:40:17,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:40:17,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:40:17,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:40:17,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:40:17,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:40:17,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:40:17,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:40:17,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:40:17,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:40:17,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:40:17,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:40:17,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:40:17,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:40:17,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:40:17,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:40:17,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:40:17,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:40:17,216 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 05:40:17,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:40:17,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:40:17,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:40:17,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:40:17,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:40:17,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:40:17,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:40:17,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:40:17,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:40:17,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:40:17,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:40:17,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:40:17,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:40:17,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:40:17,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:40:17,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:40:17,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:40:17,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:40:17,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:40:17,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:40:17,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:40:17,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:40:17,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:40:17,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:40:17,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:40:17,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:40:17,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:40:17,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:40:17,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:40:17,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:40:17,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:40:17,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:40:17,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:40:17,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:40:17,812 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:40:17,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:40:17,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304e9d76f/0317e7f8a0e64dee8fee4c8429e919b1/FLAG2ade03074 [2020-10-27 05:40:18,722 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:40:18,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:40:18,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304e9d76f/0317e7f8a0e64dee8fee4c8429e919b1/FLAG2ade03074 [2020-10-27 05:40:18,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304e9d76f/0317e7f8a0e64dee8fee4c8429e919b1 [2020-10-27 05:40:18,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:40:18,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:40:18,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:40:18,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:40:18,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:40:18,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:40:18" (1/1) ... [2020-10-27 05:40:18,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:18, skipping insertion in model container [2020-10-27 05:40:18,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:40:18" (1/1) ... [2020-10-27 05:40:19,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:40:19,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:40:19,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:40:19,433 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:40:19,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:40:19,553 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:40:19,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19 WrapperNode [2020-10-27 05:40:19,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:40:19,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:40:19,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:40:19,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:40:19,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:40:19,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:40:19,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:40:19,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:40:19,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (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 05:40:19,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:40:19,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:40:19,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:40:19,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:40:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:40:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:40:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:40:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:40:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:40:19,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:40:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:40:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:40:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:40:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:40:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:40:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:40:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:40:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:40:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:40:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:40:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:40:19,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:40:20,855 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:40:20,855 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:40:20,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:40:20 BoogieIcfgContainer [2020-10-27 05:40:20,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:40:20,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:40:20,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:40:20,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:40:20,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:40:18" (1/3) ... [2020-10-27 05:40:20,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca44717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:40:20, skipping insertion in model container [2020-10-27 05:40:20,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (2/3) ... [2020-10-27 05:40:20,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca44717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:40:20, skipping insertion in model container [2020-10-27 05:40:20,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:40:20" (3/3) ... [2020-10-27 05:40:20,872 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:40:20,888 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:40:20,895 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:40:20,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:40:20,966 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:40:20,967 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:40:20,967 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:40:20,967 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:40:20,967 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:40:20,967 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:40:20,967 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:40:20,968 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:40:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states. [2020-10-27 05:40:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:40:21,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:21,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:21,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1467259885, now seen corresponding path program 1 times [2020-10-27 05:40:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:21,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442150816] [2020-10-27 05:40:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:22,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:24,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:24,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:40:24,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:24,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3266 [2020-10-27 05:40:24,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:40:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:40:24,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:40:24,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:40:25,050 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:25,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:25,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:25,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:25,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:40:25,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:25,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:25,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:25,141 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 05:40:25,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442150816] [2020-10-27 05:40:25,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:25,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:40:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409060812] [2020-10-27 05:40:25,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:40:25,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:40:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:40:25,169 INFO L87 Difference]: Start difference. First operand 189 states. Second operand 7 states. [2020-10-27 05:40:26,748 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:40:27,003 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:40:27,260 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:40:27,500 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:40:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:28,657 INFO L93 Difference]: Finished difference Result 627 states and 1026 transitions. [2020-10-27 05:40:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:40:28,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-27 05:40:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:28,679 INFO L225 Difference]: With dead ends: 627 [2020-10-27 05:40:28,679 INFO L226 Difference]: Without dead ends: 485 [2020-10-27 05:40:28,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:40:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-27 05:40:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2020-10-27 05:40:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-27 05:40:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 711 transitions. [2020-10-27 05:40:28,834 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 711 transitions. Word has length 70 [2020-10-27 05:40:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:28,834 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 711 transitions. [2020-10-27 05:40:28,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:40:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 711 transitions. [2020-10-27 05:40:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:40:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:28,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:28,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:40:28,840 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash 586653175, now seen corresponding path program 1 times [2020-10-27 05:40:28,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:28,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705865503] [2020-10-27 05:40:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:28,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:28,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:30,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:30,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:40:30,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:30,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1619 [2020-10-27 05:40:30,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:40:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:40:30,847 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:30,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:30,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:30,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 05:40:30,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:30,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:30,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:40:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705865503] [2020-10-27 05:40:30,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:30,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:30,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104878704] [2020-10-27 05:40:30,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:30,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:30,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:30,959 INFO L87 Difference]: Start difference. First operand 476 states and 711 transitions. Second operand 6 states. [2020-10-27 05:40:31,178 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:40:31,876 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:40:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:32,344 INFO L93 Difference]: Finished difference Result 1233 states and 1880 transitions. [2020-10-27 05:40:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:32,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:40:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:32,358 INFO L225 Difference]: With dead ends: 1233 [2020-10-27 05:40:32,358 INFO L226 Difference]: Without dead ends: 796 [2020-10-27 05:40:32,367 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 05:40:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-10-27 05:40:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 793. [2020-10-27 05:40:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-10-27 05:40:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1201 transitions. [2020-10-27 05:40:32,480 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1201 transitions. Word has length 71 [2020-10-27 05:40:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:32,481 INFO L481 AbstractCegarLoop]: Abstraction has 793 states and 1201 transitions. [2020-10-27 05:40:32,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1201 transitions. [2020-10-27 05:40:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:40:32,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:32,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:32,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:40:32,493 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1638271800, now seen corresponding path program 1 times [2020-10-27 05:40:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:32,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854543406] [2020-10-27 05:40:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:32,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:32,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:34,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:34,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:40:34,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:34,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-27 05:40:34,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:34,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:34,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:34,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:40:34,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:40:34,307 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:34,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:34,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:34,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:34,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:34,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:40:34,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:34,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:34,382 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 05:40:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854543406] [2020-10-27 05:40:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:34,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806387095] [2020-10-27 05:40:34,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:34,386 INFO L87 Difference]: Start difference. First operand 793 states and 1201 transitions. Second operand 6 states. [2020-10-27 05:40:34,602 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:40:35,303 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:40:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:35,800 INFO L93 Difference]: Finished difference Result 2113 states and 3247 transitions. [2020-10-27 05:40:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:35,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:40:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:35,810 INFO L225 Difference]: With dead ends: 2113 [2020-10-27 05:40:35,811 INFO L226 Difference]: Without dead ends: 1375 [2020-10-27 05:40:35,814 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 05:40:35,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-10-27 05:40:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1372. [2020-10-27 05:40:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-10-27 05:40:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2093 transitions. [2020-10-27 05:40:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2093 transitions. Word has length 71 [2020-10-27 05:40:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:35,940 INFO L481 AbstractCegarLoop]: Abstraction has 1372 states and 2093 transitions. [2020-10-27 05:40:35,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2093 transitions. [2020-10-27 05:40:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:40:35,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:35,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:35,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:40:35,943 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2105575018, now seen corresponding path program 1 times [2020-10-27 05:40:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:35,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438602836] [2020-10-27 05:40:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:36,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:36,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:37,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:37,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:40:37,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-27 05:40:37,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:37,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:40:37,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:37,834 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:37,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:37,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:37,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:37,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:37,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:37,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:40:37,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:37,905 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 05:40:37,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438602836] [2020-10-27 05:40:37,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:37,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264208560] [2020-10-27 05:40:37,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:37,910 INFO L87 Difference]: Start difference. First operand 1372 states and 2093 transitions. Second operand 6 states. [2020-10-27 05:40:38,159 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:40:38,762 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:40:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:39,337 INFO L93 Difference]: Finished difference Result 3666 states and 5641 transitions. [2020-10-27 05:40:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:39,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:40:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:39,353 INFO L225 Difference]: With dead ends: 3666 [2020-10-27 05:40:39,353 INFO L226 Difference]: Without dead ends: 2399 [2020-10-27 05:40:39,357 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 05:40:39,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-10-27 05:40:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2396. [2020-10-27 05:40:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-27 05:40:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3657 transitions. [2020-10-27 05:40:39,559 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3657 transitions. Word has length 71 [2020-10-27 05:40:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:39,560 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3657 transitions. [2020-10-27 05:40:39,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3657 transitions. [2020-10-27 05:40:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:40:39,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:39,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:39,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:40:39,563 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:39,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1843243111, now seen corresponding path program 1 times [2020-10-27 05:40:39,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:39,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119991709] [2020-10-27 05:40:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:39,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:40:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-27 05:40:41,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:40:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:41,239 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:41,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:41,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:41,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:41,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:41,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:40:41,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:41,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:41,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:41,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:41,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:41,338 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 05:40:41,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119991709] [2020-10-27 05:40:41,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:41,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:41,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746251006] [2020-10-27 05:40:41,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:41,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:41,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:41,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:41,341 INFO L87 Difference]: Start difference. First operand 2396 states and 3657 transitions. Second operand 6 states. [2020-10-27 05:40:41,557 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:40:42,187 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:40:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:42,891 INFO L93 Difference]: Finished difference Result 6821 states and 10470 transitions. [2020-10-27 05:40:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:42,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:40:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:42,920 INFO L225 Difference]: With dead ends: 6821 [2020-10-27 05:40:42,920 INFO L226 Difference]: Without dead ends: 4503 [2020-10-27 05:40:42,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:40:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2020-10-27 05:40:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4500. [2020-10-27 05:40:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4500 states. [2020-10-27 05:40:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 6861 transitions. [2020-10-27 05:40:43,272 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 6861 transitions. Word has length 71 [2020-10-27 05:40:43,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:43,272 INFO L481 AbstractCegarLoop]: Abstraction has 4500 states and 6861 transitions. [2020-10-27 05:40:43,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 6861 transitions. [2020-10-27 05:40:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:40:43,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:43,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:43,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:40:43,276 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:43,276 INFO L82 PathProgramCache]: Analyzing trace with hash 388818878, now seen corresponding path program 1 times [2020-10-27 05:40:43,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:43,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662439301] [2020-10-27 05:40:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:43,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:43,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:43,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:47,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:47,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:40:47,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3868 [2020-10-27 05:40:47,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:47,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:40:47,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:47,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:40:47,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:40:47,600 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:47,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:47,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:47,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:47,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:47,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:40:47,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:47,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:47,666 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 05:40:47,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662439301] [2020-10-27 05:40:47,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:47,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:40:47,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183521574] [2020-10-27 05:40:47,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:40:47,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:40:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:40:47,671 INFO L87 Difference]: Start difference. First operand 4500 states and 6861 transitions. Second operand 11 states. [2020-10-27 05:40:47,926 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:40:49,226 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:40:49,448 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:40:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:51,671 INFO L93 Difference]: Finished difference Result 19546 states and 29767 transitions. [2020-10-27 05:40:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:40:51,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:40:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:51,757 INFO L225 Difference]: With dead ends: 19546 [2020-10-27 05:40:51,758 INFO L226 Difference]: Without dead ends: 15339 [2020-10-27 05:40:51,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:40:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15339 states. [2020-10-27 05:40:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15339 to 4546. [2020-10-27 05:40:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4546 states. [2020-10-27 05:40:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 6911 transitions. [2020-10-27 05:40:52,456 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 6911 transitions. Word has length 72 [2020-10-27 05:40:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:52,456 INFO L481 AbstractCegarLoop]: Abstraction has 4546 states and 6911 transitions. [2020-10-27 05:40:52,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:40:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 6911 transitions. [2020-10-27 05:40:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:40:52,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:52,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:52,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:40:52,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1903693662, now seen corresponding path program 1 times [2020-10-27 05:40:52,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:52,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403357546] [2020-10-27 05:40:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:52,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:52,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:52,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:55,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:55,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3426 [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:55,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:40:55,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:56,326 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:40:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:56,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:56,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:56,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:56,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:40:56,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:56,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:56,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:56,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:56,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:56,409 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 05:40:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403357546] [2020-10-27 05:40:56,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:56,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:40:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599853201] [2020-10-27 05:40:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:40:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:40:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:40:56,413 INFO L87 Difference]: Start difference. First operand 4546 states and 6911 transitions. Second operand 11 states. [2020-10-27 05:40:56,753 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:40:58,251 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:40:58,449 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:41:01,315 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:41:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:02,410 INFO L93 Difference]: Finished difference Result 30579 states and 46408 transitions. [2020-10-27 05:41:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:41:02,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:41:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:02,480 INFO L225 Difference]: With dead ends: 30579 [2020-10-27 05:41:02,481 INFO L226 Difference]: Without dead ends: 27800 [2020-10-27 05:41:02,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:41:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27800 states. [2020-10-27 05:41:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27800 to 4686. [2020-10-27 05:41:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2020-10-27 05:41:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 7092 transitions. [2020-10-27 05:41:03,303 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 7092 transitions. Word has length 72 [2020-10-27 05:41:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:03,303 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 7092 transitions. [2020-10-27 05:41:03,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:41:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 7092 transitions. [2020-10-27 05:41:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:41:03,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:03,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:03,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:41:03,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1821172066, now seen corresponding path program 1 times [2020-10-27 05:41:03,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:03,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117049968] [2020-10-27 05:41:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:07,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:07,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:41:07,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:41:07,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4301 [2020-10-27 05:41:07,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:41:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:41:07,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:08,068 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:08,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:08,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:08,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:08,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:08,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:41:08,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:08,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:08,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:08,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:08,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:08,147 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 05:41:08,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117049968] [2020-10-27 05:41:08,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:08,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:41:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728003066] [2020-10-27 05:41:08,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:41:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:41:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:41:08,149 INFO L87 Difference]: Start difference. First operand 4686 states and 7092 transitions. Second operand 11 states. [2020-10-27 05:41:08,402 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:41:09,636 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:41:09,863 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:41:12,332 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:41:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:13,777 INFO L93 Difference]: Finished difference Result 25323 states and 38751 transitions. [2020-10-27 05:41:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:41:13,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:41:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:13,831 INFO L225 Difference]: With dead ends: 25323 [2020-10-27 05:41:13,831 INFO L226 Difference]: Without dead ends: 24092 [2020-10-27 05:41:13,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:41:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24092 states. [2020-10-27 05:41:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24092 to 4686. [2020-10-27 05:41:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2020-10-27 05:41:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 7088 transitions. [2020-10-27 05:41:14,431 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 7088 transitions. Word has length 72 [2020-10-27 05:41:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:14,432 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 7088 transitions. [2020-10-27 05:41:14,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:41:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 7088 transitions. [2020-10-27 05:41:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:41:14,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:14,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:14,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:41:14,435 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1942451966, now seen corresponding path program 1 times [2020-10-27 05:41:14,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:14,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136107550] [2020-10-27 05:41:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:14,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:14,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:14,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:14,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:17,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2792 [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:41:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:17,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:41:17,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:17,638 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:17,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:17,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:17,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:41:17,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:17,706 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 05:41:17,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136107550] [2020-10-27 05:41:17,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:17,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:41:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011813265] [2020-10-27 05:41:17,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:41:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:41:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:41:17,709 INFO L87 Difference]: Start difference. First operand 4686 states and 7088 transitions. Second operand 11 states. [2020-10-27 05:41:17,977 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:41:19,481 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:41:19,686 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:41:20,142 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 168 [2020-10-27 05:41:23,878 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2020-10-27 05:41:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:25,905 INFO L93 Difference]: Finished difference Result 31465 states and 47910 transitions. [2020-10-27 05:41:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 05:41:25,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:41:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:25,961 INFO L225 Difference]: With dead ends: 31465 [2020-10-27 05:41:25,961 INFO L226 Difference]: Without dead ends: 29758 [2020-10-27 05:41:25,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=435, Invalid=1635, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:41:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29758 states. [2020-10-27 05:41:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29758 to 4865. [2020-10-27 05:41:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4865 states. [2020-10-27 05:41:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 7322 transitions. [2020-10-27 05:41:26,898 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 7322 transitions. Word has length 72 [2020-10-27 05:41:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:26,898 INFO L481 AbstractCegarLoop]: Abstraction has 4865 states and 7322 transitions. [2020-10-27 05:41:26,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:41:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 7322 transitions. [2020-10-27 05:41:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:41:26,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:26,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:26,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:41:26,902 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash -598431266, now seen corresponding path program 1 times [2020-10-27 05:41:26,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:26,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128559755] [2020-10-27 05:41:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:27,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:41:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:41:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:41:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:27,619 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:27,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:27,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:27,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:27,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:27,685 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 05:41:27,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128559755] [2020-10-27 05:41:27,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:27,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:41:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075867360] [2020-10-27 05:41:27,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:41:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:41:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:41:27,687 INFO L87 Difference]: Start difference. First operand 4865 states and 7322 transitions. Second operand 7 states. [2020-10-27 05:41:27,948 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:41:28,708 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:41:28,917 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:41:29,131 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:41:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:31,092 INFO L93 Difference]: Finished difference Result 19943 states and 30432 transitions. [2020-10-27 05:41:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:41:31,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-27 05:41:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:31,122 INFO L225 Difference]: With dead ends: 19943 [2020-10-27 05:41:31,122 INFO L226 Difference]: Without dead ends: 15868 [2020-10-27 05:41:31,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:41:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15868 states. [2020-10-27 05:41:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15868 to 9176. [2020-10-27 05:41:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9176 states. [2020-10-27 05:41:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 13791 transitions. [2020-10-27 05:41:32,706 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 13791 transitions. Word has length 73 [2020-10-27 05:41:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:32,707 INFO L481 AbstractCegarLoop]: Abstraction has 9176 states and 13791 transitions. [2020-10-27 05:41:32,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:41:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 13791 transitions. [2020-10-27 05:41:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:41:32,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:32,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:32,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:41:32,712 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1372668506, now seen corresponding path program 1 times [2020-10-27 05:41:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:32,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192757038] [2020-10-27 05:41:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:32,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:41:32,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 05:41:32,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:41:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 05:41:32,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:41:32,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:33,135 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:33,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:33,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:33,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:33,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:33,169 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 05:41:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192757038] [2020-10-27 05:41:33,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:33,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:41:33,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747297220] [2020-10-27 05:41:33,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:41:33,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:41:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:41:33,172 INFO L87 Difference]: Start difference. First operand 9176 states and 13791 transitions. Second operand 5 states. [2020-10-27 05:41:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:36,544 INFO L93 Difference]: Finished difference Result 17579 states and 26465 transitions. [2020-10-27 05:41:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:41:36,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-27 05:41:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:36,571 INFO L225 Difference]: With dead ends: 17579 [2020-10-27 05:41:36,571 INFO L226 Difference]: Without dead ends: 17576 [2020-10-27 05:41:36,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:41:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17576 states. [2020-10-27 05:41:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17576 to 9432. [2020-10-27 05:41:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9432 states. [2020-10-27 05:41:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 14047 transitions. [2020-10-27 05:41:38,189 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 14047 transitions. Word has length 74 [2020-10-27 05:41:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:38,189 INFO L481 AbstractCegarLoop]: Abstraction has 9432 states and 14047 transitions. [2020-10-27 05:41:38,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:41:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 14047 transitions. [2020-10-27 05:41:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:41:38,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:38,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:38,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:41:38,194 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1007369326, now seen corresponding path program 1 times [2020-10-27 05:41:38,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:38,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18394972] [2020-10-27 05:41:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:38,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1670 [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:39,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:41:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:41:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:41:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:40,130 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2020-10-27 05:41:40,341 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:40,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:40,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:40,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:40,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:40,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:41:40,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:40,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:40,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:40,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:40,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:40,389 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 05:41:40,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18394972] [2020-10-27 05:41:40,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:40,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:41:40,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21527010] [2020-10-27 05:41:40,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:41:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:40,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:41:40,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:41:40,391 INFO L87 Difference]: Start difference. First operand 9432 states and 14047 transitions. Second operand 10 states. [2020-10-27 05:41:40,630 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:41:42,298 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:41:42,512 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:41:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:49,200 INFO L93 Difference]: Finished difference Result 46387 states and 69709 transitions. [2020-10-27 05:41:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:41:49,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:41:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:49,243 INFO L225 Difference]: With dead ends: 46387 [2020-10-27 05:41:49,243 INFO L226 Difference]: Without dead ends: 39109 [2020-10-27 05:41:49,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:41:49,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39109 states. [2020-10-27 05:41:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39109 to 13535. [2020-10-27 05:41:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13535 states. [2020-10-27 05:41:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13535 states to 13535 states and 20217 transitions. [2020-10-27 05:41:51,642 INFO L78 Accepts]: Start accepts. Automaton has 13535 states and 20217 transitions. Word has length 75 [2020-10-27 05:41:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:51,642 INFO L481 AbstractCegarLoop]: Abstraction has 13535 states and 20217 transitions. [2020-10-27 05:41:51,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:41:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13535 states and 20217 transitions. [2020-10-27 05:41:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:41:51,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:51,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:51,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:41:51,647 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash 379549431, now seen corresponding path program 1 times [2020-10-27 05:41:51,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860887862] [2020-10-27 05:41:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:51,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:41:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:41:51,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:52,391 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:41:52,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:52,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:52,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:52,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:52,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:41:52,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:52,435 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 05:41:52,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860887862] [2020-10-27 05:41:52,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:52,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:41:52,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952919730] [2020-10-27 05:41:52,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:41:52,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:41:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:41:52,438 INFO L87 Difference]: Start difference. First operand 13535 states and 20217 transitions. Second operand 5 states. [2020-10-27 05:41:52,659 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:41:53,442 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:41:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:57,849 INFO L93 Difference]: Finished difference Result 36309 states and 54253 transitions. [2020-10-27 05:41:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:41:57,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:41:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:57,878 INFO L225 Difference]: With dead ends: 36309 [2020-10-27 05:41:57,879 INFO L226 Difference]: Without dead ends: 23842 [2020-10-27 05:41:57,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:41:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2020-10-27 05:42:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 23839. [2020-10-27 05:42:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23839 states. [2020-10-27 05:42:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23839 states to 23839 states and 35297 transitions. [2020-10-27 05:42:01,897 INFO L78 Accepts]: Start accepts. Automaton has 23839 states and 35297 transitions. Word has length 75 [2020-10-27 05:42:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:01,897 INFO L481 AbstractCegarLoop]: Abstraction has 23839 states and 35297 transitions. [2020-10-27 05:42:01,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:42:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23839 states and 35297 transitions. [2020-10-27 05:42:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:42:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:01,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:01,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:42:01,902 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -610011700, now seen corresponding path program 1 times [2020-10-27 05:42:01,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:01,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837517033] [2020-10-27 05:42:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:03,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:03,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:42:03,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:42:03,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-27 05:42:03,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:03,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:42:03,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:42:03,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:42:03,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:04,317 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:42:04,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:04,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:42:04,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:04,346 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 05:42:04,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837517033] [2020-10-27 05:42:04,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:04,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:42:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699731818] [2020-10-27 05:42:04,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:42:04,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:42:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:42:04,348 INFO L87 Difference]: Start difference. First operand 23839 states and 35297 transitions. Second operand 10 states. [2020-10-27 05:42:04,593 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:42:06,173 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:42:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:20,525 INFO L93 Difference]: Finished difference Result 95797 states and 141950 transitions. [2020-10-27 05:42:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:42:20,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:42:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:20,675 INFO L225 Difference]: With dead ends: 95797 [2020-10-27 05:42:20,677 INFO L226 Difference]: Without dead ends: 72356 [2020-10-27 05:42:20,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:42:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72356 states. [2020-10-27 05:42:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72356 to 32992. [2020-10-27 05:42:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32992 states. [2020-10-27 05:42:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32992 states to 32992 states and 48766 transitions. [2020-10-27 05:42:27,419 INFO L78 Accepts]: Start accepts. Automaton has 32992 states and 48766 transitions. Word has length 75 [2020-10-27 05:42:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:27,420 INFO L481 AbstractCegarLoop]: Abstraction has 32992 states and 48766 transitions. [2020-10-27 05:42:27,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:42:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 32992 states and 48766 transitions. [2020-10-27 05:42:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:42:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:27,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:27,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:42:27,425 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1751410100, now seen corresponding path program 1 times [2020-10-27 05:42:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:27,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496630551] [2020-10-27 05:42:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:27,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:29,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1647 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:42:29,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:29,470 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:42:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:29,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:29,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:29,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:29,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:42:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:29,505 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 05:42:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496630551] [2020-10-27 05:42:29,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:29,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:42:29,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41129056] [2020-10-27 05:42:29,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:42:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:42:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:42:29,507 INFO L87 Difference]: Start difference. First operand 32992 states and 48766 transitions. Second operand 10 states. [2020-10-27 05:42:29,744 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:42:31,169 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:42:31,456 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:43:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:11,718 INFO L93 Difference]: Finished difference Result 223511 states and 332122 transitions. [2020-10-27 05:43:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:43:11,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:43:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:12,215 INFO L225 Difference]: With dead ends: 223511 [2020-10-27 05:43:12,216 INFO L226 Difference]: Without dead ends: 190941 [2020-10-27 05:43:12,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:43:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190941 states. [2020-10-27 05:43:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190941 to 62908. [2020-10-27 05:43:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62908 states. [2020-10-27 05:43:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62908 states to 62908 states and 93410 transitions. [2020-10-27 05:43:26,159 INFO L78 Accepts]: Start accepts. Automaton has 62908 states and 93410 transitions. Word has length 75 [2020-10-27 05:43:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:26,159 INFO L481 AbstractCegarLoop]: Abstraction has 62908 states and 93410 transitions. [2020-10-27 05:43:26,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:43:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62908 states and 93410 transitions. [2020-10-27 05:43:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:43:26,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:26,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:43:26,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:43:26,164 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1571100434, now seen corresponding path program 1 times [2020-10-27 05:43:26,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:26,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328914710] [2020-10-27 05:43:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:26,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:28,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:28,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:43:28,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:43:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-10-27 05:43:28,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:28,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:43:28,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:43:28,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:43:28,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:28,581 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:43:28,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:28,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:43:28,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:28,621 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 05:43:28,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328914710] [2020-10-27 05:43:28,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:28,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:43:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463077677] [2020-10-27 05:43:28,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:43:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:43:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:43:28,624 INFO L87 Difference]: Start difference. First operand 62908 states and 93410 transitions. Second operand 10 states. [2020-10-27 05:43:28,880 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:43:30,468 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166