/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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:44:28,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:44:28,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:44:28,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:44:28,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:44:28,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:44:28,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:44:28,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:44:28,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:44:28,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:44:28,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:44:28,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:44:28,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:44:28,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:44:28,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:44:28,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:44:28,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:44:28,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:44:28,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:44:28,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:44:28,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:44:28,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:44:28,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:44:28,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:44:28,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:44:28,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:44:28,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:44:28,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:44:28,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:44:28,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:44:28,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:44:28,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:44:28,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:44:28,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:44:28,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:44:28,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:44:28,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:44:28,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:44:28,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:44:28,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:44:28,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:44:28,531 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 05:44:28,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:44:28,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:44:28,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:44:28,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:44:28,575 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:44:28,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:44:28,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:44:28,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:44:28,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:44:28,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:44:28,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:44:28,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:44:28,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:44:28,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:44:28,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:44:28,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:44:28,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:44:28,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:44:28,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:44:28,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:44:28,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:44:28,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:44:28,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:44:28,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:44:28,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:44:28,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:44:28,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:44:28,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:44:28,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:44:28,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:44:28,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:44:29,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:44:29,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:44:29,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:44:29,012 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:44:29,014 INFO L432 ainManager$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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:44:29,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdc1fd518/17a80aaddf2147f5a5e4ef64b9a1170d/FLAG3b0b6608e [2020-10-27 05:44:29,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:44:29,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:44:29,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdc1fd518/17a80aaddf2147f5a5e4ef64b9a1170d/FLAG3b0b6608e [2020-10-27 05:44:30,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdc1fd518/17a80aaddf2147f5a5e4ef64b9a1170d [2020-10-27 05:44:30,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:44:30,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:44:30,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:44:30,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:44:30,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:44:30,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6e0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30, skipping insertion in model container [2020-10-27 05:44:30,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:44:30,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:44:30,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:44:30,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:44:30,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:44:30,616 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:44:30,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30 WrapperNode [2020-10-27 05:44:30,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:44:30,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:44:30,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:44:30,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:44:30,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (1/1) ... [2020-10-27 05:44:30,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:44:30,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:44:30,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:44:30,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:44:30,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (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 05:44:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:44:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:44:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:44:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:44:30,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:44:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:44:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:44:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:44:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:44:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:44:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:44:30,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:44:31,795 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:44:31,796 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:44:31,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:44:31 BoogieIcfgContainer [2020-10-27 05:44:31,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:44:31,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:44:31,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:44:31,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:44:31,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:44:30" (1/3) ... [2020-10-27 05:44:31,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0d9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:44:31, skipping insertion in model container [2020-10-27 05:44:31,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:44:30" (2/3) ... [2020-10-27 05:44:31,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0d9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:44:31, skipping insertion in model container [2020-10-27 05:44:31,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:44:31" (3/3) ... [2020-10-27 05:44:31,812 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-27 05:44:31,826 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:44:31,832 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:44:31,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:44:31,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:44:31,886 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:44:31,886 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:44:31,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:44:31,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:44:31,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:44:31,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:44:31,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:44:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states. [2020-10-27 05:44:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:44:31,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:31,919 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 05:44:31,920 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1467259885, now seen corresponding path program 1 times [2020-10-27 05:44:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:31,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483011317] [2020-10-27 05:44:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:32,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:33,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:35,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:35,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:44:35,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:44:35,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3436 [2020-10-27 05:44:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:44:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:44:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:44:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:44:36,193 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:36,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:36,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:36,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:36,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:36,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:44:36,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:44:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:36,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:44:36,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:44:36,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483011317] [2020-10-27 05:44:36,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:36,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:44:36,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777539970] [2020-10-27 05:44:36,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:44:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:44:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:44:36,311 INFO L87 Difference]: Start difference. First operand 189 states. Second operand 7 states. [2020-10-27 05:44:37,996 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:44:38,333 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:44:38,609 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:44:38,899 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:44:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:40,086 INFO L93 Difference]: Finished difference Result 627 states and 1026 transitions. [2020-10-27 05:44:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:44:40,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-27 05:44:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:40,128 INFO L225 Difference]: With dead ends: 627 [2020-10-27 05:44:40,129 INFO L226 Difference]: Without dead ends: 485 [2020-10-27 05:44:40,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:44:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-27 05:44:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 476. [2020-10-27 05:44:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-27 05:44:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 711 transitions. [2020-10-27 05:44:40,242 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 711 transitions. Word has length 70 [2020-10-27 05:44:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:40,243 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 711 transitions. [2020-10-27 05:44:40,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:44:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 711 transitions. [2020-10-27 05:44:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:40,249 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 05:44:40,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:44:40,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 586653175, now seen corresponding path program 1 times [2020-10-27 05:44:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648470046] [2020-10-27 05:44:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:40,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:42,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:42,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:42,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:44:42,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-27 05:44:42,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:44:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:42,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:44:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:42,302 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:42,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:42,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:42,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:42,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:42,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:42,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 05:44:42,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:42,374 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 05:44:42,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648470046] [2020-10-27 05:44:42,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:42,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:44:42,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719468596] [2020-10-27 05:44:42,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:44:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:44:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:44:42,378 INFO L87 Difference]: Start difference. First operand 476 states and 711 transitions. Second operand 6 states. [2020-10-27 05:44:42,668 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:44:43,480 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:44:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:43,997 INFO L93 Difference]: Finished difference Result 1233 states and 1880 transitions. [2020-10-27 05:44:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:44:43,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:44:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:44,003 INFO L225 Difference]: With dead ends: 1233 [2020-10-27 05:44:44,004 INFO L226 Difference]: Without dead ends: 796 [2020-10-27 05:44:44,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:44:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2020-10-27 05:44:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 793. [2020-10-27 05:44:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-10-27 05:44:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1201 transitions. [2020-10-27 05:44:44,084 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1201 transitions. Word has length 71 [2020-10-27 05:44:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:44,084 INFO L481 AbstractCegarLoop]: Abstraction has 793 states and 1201 transitions. [2020-10-27 05:44:44,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:44:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1201 transitions. [2020-10-27 05:44:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:44,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:44,088 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 05:44:44,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:44:44,089 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1638271800, now seen corresponding path program 1 times [2020-10-27 05:44:44,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:44,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838446644] [2020-10-27 05:44:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:44,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:44,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:44,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:45,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:45,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:45,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:44:45,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-27 05:44:45,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:44:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:44:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:45,841 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:45,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:45,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:45,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:45,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:44:45,915 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 05:44:45,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838446644] [2020-10-27 05:44:45,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:45,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:44:45,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901834032] [2020-10-27 05:44:45,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:44:45,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:44:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:44:45,921 INFO L87 Difference]: Start difference. First operand 793 states and 1201 transitions. Second operand 6 states. [2020-10-27 05:44:46,208 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:44:46,982 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:44:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:47,535 INFO L93 Difference]: Finished difference Result 2113 states and 3247 transitions. [2020-10-27 05:44:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:44:47,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:44:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:47,545 INFO L225 Difference]: With dead ends: 2113 [2020-10-27 05:44:47,545 INFO L226 Difference]: Without dead ends: 1375 [2020-10-27 05:44:47,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:44:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-10-27 05:44:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1372. [2020-10-27 05:44:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2020-10-27 05:44:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2093 transitions. [2020-10-27 05:44:47,655 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2093 transitions. Word has length 71 [2020-10-27 05:44:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:47,655 INFO L481 AbstractCegarLoop]: Abstraction has 1372 states and 2093 transitions. [2020-10-27 05:44:47,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:44:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2093 transitions. [2020-10-27 05:44:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:47,658 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 05:44:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:44:47,658 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2105575018, now seen corresponding path program 1 times [2020-10-27 05:44:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418822594] [2020-10-27 05:44:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:47,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:49,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:49,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:49,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:44:49,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-27 05:44:49,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:44:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:49,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:44:49,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:49,419 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:49,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:49,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:49,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:49,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:44:49,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:49,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:49,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:49,486 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 05:44:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418822594] [2020-10-27 05:44:49,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:44:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054291047] [2020-10-27 05:44:49,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:44:49,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:49,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:44:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:44:49,489 INFO L87 Difference]: Start difference. First operand 1372 states and 2093 transitions. Second operand 6 states. [2020-10-27 05:44:49,807 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:44:50,464 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:44:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:51,039 INFO L93 Difference]: Finished difference Result 3666 states and 5641 transitions. [2020-10-27 05:44:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:44:51,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:44:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:51,053 INFO L225 Difference]: With dead ends: 3666 [2020-10-27 05:44:51,054 INFO L226 Difference]: Without dead ends: 2399 [2020-10-27 05:44:51,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:44:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-10-27 05:44:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2396. [2020-10-27 05:44:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2396 states. [2020-10-27 05:44:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3657 transitions. [2020-10-27 05:44:51,261 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3657 transitions. Word has length 71 [2020-10-27 05:44:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:51,261 INFO L481 AbstractCegarLoop]: Abstraction has 2396 states and 3657 transitions. [2020-10-27 05:44:51,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:44:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3657 transitions. [2020-10-27 05:44:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:44:51,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:51,264 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 05:44:51,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:44:51,264 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1843243111, now seen corresponding path program 1 times [2020-10-27 05:44:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733394023] [2020-10-27 05:44:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:52,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:52,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:44:52,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:44:52,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-27 05:44:52,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:44:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:44:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:52,896 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:52,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:52,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:52,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:52,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:52,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:44:52,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:52,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:52,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:52,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:44:52,964 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 05:44:52,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733394023] [2020-10-27 05:44:52,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:52,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:44:52,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465260385] [2020-10-27 05:44:52,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:44:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:44:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:44:52,966 INFO L87 Difference]: Start difference. First operand 2396 states and 3657 transitions. Second operand 6 states. [2020-10-27 05:44:53,261 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:44:53,980 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 05:44:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:44:54,649 INFO L93 Difference]: Finished difference Result 6821 states and 10470 transitions. [2020-10-27 05:44:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:44:54,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:44:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:44:54,675 INFO L225 Difference]: With dead ends: 6821 [2020-10-27 05:44:54,675 INFO L226 Difference]: Without dead ends: 4503 [2020-10-27 05:44:54,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:44:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2020-10-27 05:44:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4500. [2020-10-27 05:44:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4500 states. [2020-10-27 05:44:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 6861 transitions. [2020-10-27 05:44:54,987 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 6861 transitions. Word has length 71 [2020-10-27 05:44:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:44:54,987 INFO L481 AbstractCegarLoop]: Abstraction has 4500 states and 6861 transitions. [2020-10-27 05:44:54,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:44:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 6861 transitions. [2020-10-27 05:44:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:44:54,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:44:54,990 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 05:44:54,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:44:54,990 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:44:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:44:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash 388818878, now seen corresponding path program 1 times [2020-10-27 05:44:54,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:44:54,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531048312] [2020-10-27 05:44:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:44:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:58,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:58,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:44:58,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:44:58,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3927 [2020-10-27 05:44:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:44:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:44:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:44:58,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:44:59,479 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:44:59,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:44:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:44:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:59,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:44:59,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:44:59,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:44:59,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 05:44:59,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:44:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:44:59,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:44:59,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:44:59,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:44:59,580 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 05:44:59,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531048312] [2020-10-27 05:44:59,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:44:59,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:44:59,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744619627] [2020-10-27 05:44:59,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:44:59,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:44:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:44:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:44:59,589 INFO L87 Difference]: Start difference. First operand 4500 states and 6861 transitions. Second operand 11 states. [2020-10-27 05:44:59,985 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:45:01,660 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:45:02,002 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:45:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:04,445 INFO L93 Difference]: Finished difference Result 19546 states and 29767 transitions. [2020-10-27 05:45:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:45:04,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:45:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:04,540 INFO L225 Difference]: With dead ends: 19546 [2020-10-27 05:45:04,540 INFO L226 Difference]: Without dead ends: 15339 [2020-10-27 05:45:04,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:45:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15339 states. [2020-10-27 05:45:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15339 to 4546. [2020-10-27 05:45:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4546 states. [2020-10-27 05:45:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 6911 transitions. [2020-10-27 05:45:05,264 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 6911 transitions. Word has length 72 [2020-10-27 05:45:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:05,265 INFO L481 AbstractCegarLoop]: Abstraction has 4546 states and 6911 transitions. [2020-10-27 05:45:05,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:45:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 6911 transitions. [2020-10-27 05:45:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:45:05,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:05,267 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 05:45:05,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:45:05,268 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1903693662, now seen corresponding path program 1 times [2020-10-27 05:45:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:05,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964146456] [2020-10-27 05:45:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:05,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:05,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:05,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:08,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:08,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3686 [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:45:08,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:09,438 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:09,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:09,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:09,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:09,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:45:09,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:09,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:09,537 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 05:45:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964146456] [2020-10-27 05:45:09,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:09,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:45:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838296418] [2020-10-27 05:45:09,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:45:09,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:09,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:45:09,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:45:09,540 INFO L87 Difference]: Start difference. First operand 4546 states and 6911 transitions. Second operand 11 states. [2020-10-27 05:45:09,894 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:45:11,558 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:45:11,830 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:45:15,107 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:45:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:16,269 INFO L93 Difference]: Finished difference Result 30579 states and 46408 transitions. [2020-10-27 05:45:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:45:16,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:45:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:16,346 INFO L225 Difference]: With dead ends: 30579 [2020-10-27 05:45:16,346 INFO L226 Difference]: Without dead ends: 27800 [2020-10-27 05:45:16,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:45:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27800 states. [2020-10-27 05:45:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27800 to 4686. [2020-10-27 05:45:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2020-10-27 05:45:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 7092 transitions. [2020-10-27 05:45:17,219 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 7092 transitions. Word has length 72 [2020-10-27 05:45:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:17,220 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 7092 transitions. [2020-10-27 05:45:17,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:45:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 7092 transitions. [2020-10-27 05:45:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:45:17,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:17,223 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 05:45:17,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:45:17,223 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1821172066, now seen corresponding path program 1 times [2020-10-27 05:45:17,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:17,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877789487] [2020-10-27 05:45:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:17,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:21,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:21,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:45:21,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:45:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4302 [2020-10-27 05:45:21,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:45:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:45:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:22,130 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:22,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:22,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:22,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:22,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:22,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:45:22,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:22,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:22,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:22,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:22,218 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 05:45:22,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877789487] [2020-10-27 05:45:22,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:22,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:45:22,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26195408] [2020-10-27 05:45:22,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:45:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:45:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:45:22,225 INFO L87 Difference]: Start difference. First operand 4686 states and 7092 transitions. Second operand 11 states. [2020-10-27 05:45:22,617 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:45:24,195 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:45:24,488 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:45:27,502 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:45:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:29,125 INFO L93 Difference]: Finished difference Result 25323 states and 38751 transitions. [2020-10-27 05:45:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:45:29,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:45:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:29,174 INFO L225 Difference]: With dead ends: 25323 [2020-10-27 05:45:29,174 INFO L226 Difference]: Without dead ends: 24092 [2020-10-27 05:45:29,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:45:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24092 states. [2020-10-27 05:45:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24092 to 4686. [2020-10-27 05:45:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2020-10-27 05:45:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 7088 transitions. [2020-10-27 05:45:29,936 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 7088 transitions. Word has length 72 [2020-10-27 05:45:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:29,936 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 7088 transitions. [2020-10-27 05:45:29,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:45:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 7088 transitions. [2020-10-27 05:45:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:45:29,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:29,939 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 05:45:29,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:45:29,939 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1942451966, now seen corresponding path program 1 times [2020-10-27 05:45:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:29,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784660006] [2020-10-27 05:45:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:29,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:30,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:30,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:33,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:45:33,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3161 [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:45:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:33,595 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:33,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:33,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:33,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:33,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:45:33,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:45:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:45:33,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:33,666 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 05:45:33,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784660006] [2020-10-27 05:45:33,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:33,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:45:33,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241011506] [2020-10-27 05:45:33,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:45:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:33,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:45:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:45:33,669 INFO L87 Difference]: Start difference. First operand 4686 states and 7088 transitions. Second operand 11 states. [2020-10-27 05:45:34,012 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:45:35,790 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:45:36,099 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:45:36,456 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:45:40,304 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:45:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:42,314 INFO L93 Difference]: Finished difference Result 31465 states and 47910 transitions. [2020-10-27 05:45:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 05:45:42,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 05:45:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:42,368 INFO L225 Difference]: With dead ends: 31465 [2020-10-27 05:45:42,369 INFO L226 Difference]: Without dead ends: 29758 [2020-10-27 05:45:42,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=380, Invalid=1512, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 05:45:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29758 states. [2020-10-27 05:45:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29758 to 4865. [2020-10-27 05:45:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4865 states. [2020-10-27 05:45:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 7322 transitions. [2020-10-27 05:45:43,548 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 7322 transitions. Word has length 72 [2020-10-27 05:45:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:43,549 INFO L481 AbstractCegarLoop]: Abstraction has 4865 states and 7322 transitions. [2020-10-27 05:45:43,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:45:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 7322 transitions. [2020-10-27 05:45:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:45:43,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:43,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:45:43,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:45:43,553 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -598431266, now seen corresponding path program 1 times [2020-10-27 05:45:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:43,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275722340] [2020-10-27 05:45:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:43,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:43,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:45:43,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:45:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-27 05:45:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:45:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:45:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:45:43,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:44,270 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:44,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:44,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:44,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:44,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:44,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:44,316 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 05:45:44,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275722340] [2020-10-27 05:45:44,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:44,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:45:44,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965959365] [2020-10-27 05:45:44,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:45:44,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:45:44,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:45:44,319 INFO L87 Difference]: Start difference. First operand 4865 states and 7322 transitions. Second operand 7 states. [2020-10-27 05:45:44,623 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:45:45,518 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:45:45,792 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 05:45:46,074 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 05:45:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:48,115 INFO L93 Difference]: Finished difference Result 20074 states and 30610 transitions. [2020-10-27 05:45:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:45:48,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-27 05:45:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:48,139 INFO L225 Difference]: With dead ends: 20074 [2020-10-27 05:45:48,139 INFO L226 Difference]: Without dead ends: 15999 [2020-10-27 05:45:48,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:45:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15999 states. [2020-10-27 05:45:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15999 to 9265. [2020-10-27 05:45:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9265 states. [2020-10-27 05:45:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9265 states to 9265 states and 13915 transitions. [2020-10-27 05:45:49,577 INFO L78 Accepts]: Start accepts. Automaton has 9265 states and 13915 transitions. Word has length 73 [2020-10-27 05:45:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:49,577 INFO L481 AbstractCegarLoop]: Abstraction has 9265 states and 13915 transitions. [2020-10-27 05:45:49,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:45:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 9265 states and 13915 transitions. [2020-10-27 05:45:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:45:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:49,582 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 05:45:49,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:45:49,583 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1372668506, now seen corresponding path program 1 times [2020-10-27 05:45:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:49,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272305454] [2020-10-27 05:45:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:49,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:49,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:49,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:45:49,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:49,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 05:45:49,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:49,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:45:49,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 05:45:49,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:45:49,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:50,095 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:50,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:50,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:50,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:45:50,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:50,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:50,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:50,135 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 05:45:50,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272305454] [2020-10-27 05:45:50,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:50,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:45:50,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433354757] [2020-10-27 05:45:50,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:45:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:45:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:45:50,138 INFO L87 Difference]: Start difference. First operand 9265 states and 13915 transitions. Second operand 5 states. [2020-10-27 05:45:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:45:53,253 INFO L93 Difference]: Finished difference Result 17668 states and 26589 transitions. [2020-10-27 05:45:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:45:53,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-27 05:45:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:45:53,281 INFO L225 Difference]: With dead ends: 17668 [2020-10-27 05:45:53,281 INFO L226 Difference]: Without dead ends: 17665 [2020-10-27 05:45:53,287 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 05:45:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17665 states. [2020-10-27 05:45:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17665 to 9521. [2020-10-27 05:45:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9521 states. [2020-10-27 05:45:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9521 states to 9521 states and 14171 transitions. [2020-10-27 05:45:54,851 INFO L78 Accepts]: Start accepts. Automaton has 9521 states and 14171 transitions. Word has length 74 [2020-10-27 05:45:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:45:54,852 INFO L481 AbstractCegarLoop]: Abstraction has 9521 states and 14171 transitions. [2020-10-27 05:45:54,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:45:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9521 states and 14171 transitions. [2020-10-27 05:45:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:45:54,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:54,857 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 05:45:54,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:45:54,858 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1007369326, now seen corresponding path program 1 times [2020-10-27 05:45:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332465428] [2020-10-27 05:45:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:56,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1594 [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:45:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:45:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:45:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:56,748 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2020-10-27 05:45:57,041 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:45:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:57,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:57,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:57,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:45:57,107 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 05:45:57,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332465428] [2020-10-27 05:45:57,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:57,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:45:57,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670046236] [2020-10-27 05:45:57,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:45:57,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:45:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:45:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:45:57,110 INFO L87 Difference]: Start difference. First operand 9521 states and 14171 transitions. Second operand 10 states. [2020-10-27 05:45:57,417 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:45:59,235 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:45:59,520 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:46:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:06,206 INFO L93 Difference]: Finished difference Result 46646 states and 70079 transitions. [2020-10-27 05:46:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 05:46:06,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:46:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:06,254 INFO L225 Difference]: With dead ends: 46646 [2020-10-27 05:46:06,254 INFO L226 Difference]: Without dead ends: 39291 [2020-10-27 05:46:06,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:46:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39291 states. [2020-10-27 05:46:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39291 to 13636. [2020-10-27 05:46:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13636 states. [2020-10-27 05:46:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13636 states to 13636 states and 20361 transitions. [2020-10-27 05:46:08,632 INFO L78 Accepts]: Start accepts. Automaton has 13636 states and 20361 transitions. Word has length 75 [2020-10-27 05:46:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:08,632 INFO L481 AbstractCegarLoop]: Abstraction has 13636 states and 20361 transitions. [2020-10-27 05:46:08,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:46:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13636 states and 20361 transitions. [2020-10-27 05:46:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:46:08,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:08,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:08,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:46:08,637 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 379549431, now seen corresponding path program 1 times [2020-10-27 05:46:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558492610] [2020-10-27 05:46:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:08,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:08,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:46:08,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:09,155 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:09,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:09,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:09,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:09,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:09,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:46:09,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558492610] [2020-10-27 05:46:09,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:09,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:46:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415963048] [2020-10-27 05:46:09,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:46:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:46:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:09,202 INFO L87 Difference]: Start difference. First operand 13636 states and 20361 transitions. Second operand 5 states. [2020-10-27 05:46:09,503 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 05:46:10,411 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 05:46:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:14,929 INFO L93 Difference]: Finished difference Result 36410 states and 54397 transitions. [2020-10-27 05:46:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:46:14,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-27 05:46:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:14,957 INFO L225 Difference]: With dead ends: 36410 [2020-10-27 05:46:14,957 INFO L226 Difference]: Without dead ends: 23943 [2020-10-27 05:46:14,973 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 05:46:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23943 states. [2020-10-27 05:46:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23943 to 23940. [2020-10-27 05:46:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23940 states. [2020-10-27 05:46:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23940 states to 23940 states and 35441 transitions. [2020-10-27 05:46:19,103 INFO L78 Accepts]: Start accepts. Automaton has 23940 states and 35441 transitions. Word has length 75 [2020-10-27 05:46:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:19,103 INFO L481 AbstractCegarLoop]: Abstraction has 23940 states and 35441 transitions. [2020-10-27 05:46:19,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:46:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 23940 states and 35441 transitions. [2020-10-27 05:46:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:46:19,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:19,107 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 05:46:19,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:46:19,108 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash -610011700, now seen corresponding path program 1 times [2020-10-27 05:46:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:19,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762688926] [2020-10-27 05:46:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:19,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:21,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:21,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:46:21,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:46:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-27 05:46:21,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:46:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:46:21,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:46:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:21,515 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:21,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:21,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:21,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:21,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:21,547 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 05:46:21,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762688926] [2020-10-27 05:46:21,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:21,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:46:21,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267717557] [2020-10-27 05:46:21,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:46:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:46:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:46:21,548 INFO L87 Difference]: Start difference. First operand 23940 states and 35441 transitions. Second operand 10 states. [2020-10-27 05:46:21,868 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:46:23,763 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:46:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:38,280 INFO L93 Difference]: Finished difference Result 96063 states and 142328 transitions. [2020-10-27 05:46:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:46:38,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:46:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:38,557 INFO L225 Difference]: With dead ends: 96063 [2020-10-27 05:46:38,557 INFO L226 Difference]: Without dead ends: 72554 [2020-10-27 05:46:38,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:46:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72554 states. [2020-10-27 05:46:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72554 to 33139. [2020-10-27 05:46:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33139 states. [2020-10-27 05:46:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33139 states to 33139 states and 48978 transitions. [2020-10-27 05:46:45,674 INFO L78 Accepts]: Start accepts. Automaton has 33139 states and 48978 transitions. Word has length 75 [2020-10-27 05:46:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:45,674 INFO L481 AbstractCegarLoop]: Abstraction has 33139 states and 48978 transitions. [2020-10-27 05:46:45,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:46:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 33139 states and 48978 transitions. [2020-10-27 05:46:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:46:45,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:45,680 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 05:46:45,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:46:45,680 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1751410100, now seen corresponding path program 1 times [2020-10-27 05:46:45,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:45,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905449794] [2020-10-27 05:46:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:45,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:46,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:47,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1465 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:46:47,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:46:47,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:47,646 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:46:47,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:47,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:47,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:47,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:47,680 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 05:46:47,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905449794] [2020-10-27 05:46:47,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:47,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:46:47,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698771388] [2020-10-27 05:46:47,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:46:47,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:46:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:46:47,682 INFO L87 Difference]: Start difference. First operand 33139 states and 48978 transitions. Second operand 10 states. [2020-10-27 05:46:47,991 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:46:49,748 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:46:50,268 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 05:47:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:47:32,203 INFO L93 Difference]: Finished difference Result 227824 states and 338520 transitions. [2020-10-27 05:47:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:47:32,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-27 05:47:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:47:32,746 INFO L225 Difference]: With dead ends: 227824 [2020-10-27 05:47:32,747 INFO L226 Difference]: Without dead ends: 195254 [2020-10-27 05:47:32,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:47:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195254 states. [2020-10-27 05:47:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195254 to 63103. [2020-10-27 05:47:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63103 states. [2020-10-27 05:47:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63103 states to 63103 states and 93686 transitions. [2020-10-27 05:47:46,994 INFO L78 Accepts]: Start accepts. Automaton has 63103 states and 93686 transitions. Word has length 75 [2020-10-27 05:47:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:46,994 INFO L481 AbstractCegarLoop]: Abstraction has 63103 states and 93686 transitions. [2020-10-27 05:47:46,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:47:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 63103 states and 93686 transitions. [2020-10-27 05:47:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:47:46,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:46,999 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 05:47:46,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:47:46,999 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1571100434, now seen corresponding path program 1 times [2020-10-27 05:47:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:47,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062822941] [2020-10-27 05:47:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:47,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:47,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2056 [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:47:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:47:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:47:49,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:49,518 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 05:47:49,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:49,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:47:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:47:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:49,563 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 05:47:49,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062822941] [2020-10-27 05:47:49,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:47:49,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:47:49,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446725652] [2020-10-27 05:47:49,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:47:49,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:47:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:47:49,566 INFO L87 Difference]: Start difference. First operand 63103 states and 93686 transitions. Second operand 10 states. [2020-10-27 05:47:49,855 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 05:47:51,941 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:47:52,270 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 167