/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:40:14,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:40:14,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:40:14,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:40:14,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:40:14,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:40:14,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:40:14,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:40:14,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:40:14,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:40:14,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:40:14,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:40:14,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:40:14,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:40:14,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:40:14,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:40:14,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:40:14,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:40:14,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:40:14,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:40:14,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:40:14,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:40:14,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:40:14,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:40:14,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:40:14,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:40:14,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:40:14,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:40:14,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:40:14,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:40:14,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:40:14,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:40:14,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:40:14,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:40:14,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:40:14,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:40:14,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:40:14,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:40:14,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:40:14,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:40:14,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:40:14,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:40:14,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:40:14,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:40:14,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:40:14,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:40:14,820 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:40:14,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:40:14,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:40:14,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:40:14,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:40:14,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:40:14,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:40:14,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:40:14,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:40:14,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:40:14,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:40:14,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:40:14,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:40:14,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:40:14,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:40:14,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:40:14,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:40:14,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:40:14,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:40:14,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:40:14,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:40:14,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:40:14,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:40:14,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:40:14,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:40:14,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:40:15,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:40:15,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:40:15,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:40:15,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:40:15,270 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:40:15,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:40:15,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ad8f464/2df089fa81e94204a2f6d63130e387d4/FLAG255fdce62 [2020-10-27 05:40:16,315 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:40:16,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:40:16,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ad8f464/2df089fa81e94204a2f6d63130e387d4/FLAG255fdce62 [2020-10-27 05:40:16,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7ad8f464/2df089fa81e94204a2f6d63130e387d4 [2020-10-27 05:40:16,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:40:16,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:40:16,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:40:16,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:40:16,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:40:16,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:40:16" (1/1) ... [2020-10-27 05:40:16,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e70f18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:16, skipping insertion in model container [2020-10-27 05:40:16,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:40:16" (1/1) ... [2020-10-27 05:40:16,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:40:17,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:40:18,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:40:18,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:40:19,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:40:19,148 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:40:19,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19 WrapperNode [2020-10-27 05:40:19,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:40:19,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:40:19,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:40:19,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:40:19,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... [2020-10-27 05:40:19,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:40:19,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:40:19,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:40:19,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:40:19,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:40:19,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:40:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:40:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:40:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:40:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:40:19,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:40:19,626 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:40:19,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:40:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:40:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:40:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:40:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:40:19,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:40:23,967 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:40:23,967 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:40:23,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:40:23 BoogieIcfgContainer [2020-10-27 05:40:23,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:40:23,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:40:23,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:40:23,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:40:23,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:40:16" (1/3) ... [2020-10-27 05:40:23,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3940b7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:40:23, skipping insertion in model container [2020-10-27 05:40:23,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:40:19" (2/3) ... [2020-10-27 05:40:23,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3940b7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:40:23, skipping insertion in model container [2020-10-27 05:40:23,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:40:23" (3/3) ... [2020-10-27 05:40:23,980 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-27 05:40:23,993 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:40:23,999 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:40:24,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:40:24,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:40:24,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:40:24,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:40:24,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:40:24,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:40:24,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:40:24,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:40:24,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:40:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states. [2020-10-27 05:40:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:40:24,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:24,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:24,112 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1940053764, now seen corresponding path program 1 times [2020-10-27 05:40:24,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:24,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454833585] [2020-10-27 05:40:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:24,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:25,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:25,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:29,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:29,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:40:29,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:40:29,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-27 05:40:29,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:29,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:40:29,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:40:32,704 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:40:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:32,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:32,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:32,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:32,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 05:40:32,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:32,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:32,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:32,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:32,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:32,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454833585] [2020-10-27 05:40:32,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:32,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:40:32,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085404848] [2020-10-27 05:40:32,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:32,966 INFO L87 Difference]: Start difference. First operand 1115 states. Second operand 6 states. [2020-10-27 05:40:35,760 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:40:49,819 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:40:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:50,939 INFO L93 Difference]: Finished difference Result 1634 states and 2949 transitions. [2020-10-27 05:40:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:50,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:40:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:50,978 INFO L225 Difference]: With dead ends: 1634 [2020-10-27 05:40:50,979 INFO L226 Difference]: Without dead ends: 1115 [2020-10-27 05:40:50,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:40:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-27 05:40:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1109. [2020-10-27 05:40:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-10-27 05:40:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1405 transitions. [2020-10-27 05:40:51,174 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1405 transitions. Word has length 69 [2020-10-27 05:40:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:51,175 INFO L481 AbstractCegarLoop]: Abstraction has 1109 states and 1405 transitions. [2020-10-27 05:40:51,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1405 transitions. [2020-10-27 05:40:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:40:51,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:51,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:51,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:40:51,186 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash -462731809, now seen corresponding path program 1 times [2020-10-27 05:40:51,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:51,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272007092] [2020-10-27 05:40:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:51,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:53,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:54,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:56,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:56,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:40:56,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:40:56,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:40:56,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:40:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:56,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:40:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:40:59,215 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:40:59,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:59,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:59,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:59,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:59,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 05:40:59,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:59,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:59,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:59,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272007092] [2020-10-27 05:40:59,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:59,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:40:59,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273038789] [2020-10-27 05:40:59,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:40:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:40:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:40:59,414 INFO L87 Difference]: Start difference. First operand 1109 states and 1405 transitions. Second operand 8 states. [2020-10-27 05:41:02,363 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:41:12,839 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-27 05:41:17,021 WARN L193 SmtUtils]: Spent 2.74 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:41:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:17,198 INFO L93 Difference]: Finished difference Result 2049 states and 2811 transitions. [2020-10-27 05:41:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:41:17,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-27 05:41:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:17,210 INFO L225 Difference]: With dead ends: 2049 [2020-10-27 05:41:17,210 INFO L226 Difference]: Without dead ends: 1696 [2020-10-27 05:41:17,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:41:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2020-10-27 05:41:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1111. [2020-10-27 05:41:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-10-27 05:41:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1405 transitions. [2020-10-27 05:41:17,282 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1405 transitions. Word has length 69 [2020-10-27 05:41:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:17,283 INFO L481 AbstractCegarLoop]: Abstraction has 1111 states and 1405 transitions. [2020-10-27 05:41:17,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:41:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1405 transitions. [2020-10-27 05:41:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:41:17,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:17,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:41:17,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:41:17,287 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -721698554, now seen corresponding path program 1 times [2020-10-27 05:41:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816021733] [2020-10-27 05:41:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:17,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:17,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:41:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:41:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:25,278 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:41:25,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:25,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:25,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:25,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:25,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 05:41:25,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:25,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:25,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816021733] [2020-10-27 05:41:25,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:25,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:41:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455093543] [2020-10-27 05:41:25,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:41:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:41:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:41:25,434 INFO L87 Difference]: Start difference. First operand 1111 states and 1405 transitions. Second operand 6 states. [2020-10-27 05:41:28,277 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-27 05:41:36,411 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-27 05:41:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:37,575 INFO L93 Difference]: Finished difference Result 1954 states and 2574 transitions. [2020-10-27 05:41:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:41:37,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 05:41:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:37,583 INFO L225 Difference]: With dead ends: 1954 [2020-10-27 05:41:37,583 INFO L226 Difference]: Without dead ends: 1136 [2020-10-27 05:41:37,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:41:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2020-10-27 05:41:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1130. [2020-10-27 05:41:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2020-10-27 05:41:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1499 transitions. [2020-10-27 05:41:37,656 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1499 transitions. Word has length 69 [2020-10-27 05:41:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:37,656 INFO L481 AbstractCegarLoop]: Abstraction has 1130 states and 1499 transitions. [2020-10-27 05:41:37,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:41:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1499 transitions. [2020-10-27 05:41:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:41:37,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:37,659 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 05:41:37,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:41:37,660 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 921100505, now seen corresponding path program 1 times [2020-10-27 05:41:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:37,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106489241] [2020-10-27 05:41:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:37,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:37,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:38,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:42,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:42,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:41:42,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:41:42,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 05:41:42,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:41:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:42,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:41:42,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:45,747 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:41:45,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:45,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:45,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:45,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:45,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:45,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 05:41:45,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:45,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:45,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:45,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106489241] [2020-10-27 05:41:45,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:45,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:41:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515657095] [2020-10-27 05:41:45,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:41:45,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:41:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:41:45,901 INFO L87 Difference]: Start difference. First operand 1130 states and 1499 transitions. Second operand 8 states. [2020-10-27 05:41:48,748 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-27 05:41:56,940 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:42:01,063 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-27 05:42:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:01,264 INFO L93 Difference]: Finished difference Result 3428 states and 4964 transitions. [2020-10-27 05:42:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:42:01,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 05:42:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:01,280 INFO L225 Difference]: With dead ends: 3428 [2020-10-27 05:42:01,280 INFO L226 Difference]: Without dead ends: 2967 [2020-10-27 05:42:01,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:42:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2020-10-27 05:42:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 1145. [2020-10-27 05:42:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2020-10-27 05:42:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1510 transitions. [2020-10-27 05:42:01,380 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1510 transitions. Word has length 70 [2020-10-27 05:42:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:01,380 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1510 transitions. [2020-10-27 05:42:01,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:42:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1510 transitions. [2020-10-27 05:42:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:42:01,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:01,383 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 05:42:01,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:42:01,384 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:01,384 INFO L82 PathProgramCache]: Analyzing trace with hash 665779874, now seen corresponding path program 1 times [2020-10-27 05:42:01,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:01,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957268188] [2020-10-27 05:42:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:01,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:01,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:02,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:02,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:06,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:42:06,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:09,573 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:42:09,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:09,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:09,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:09,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 05:42:09,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:09,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:42:09,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957268188] [2020-10-27 05:42:09,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:42:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825636797] [2020-10-27 05:42:09,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:42:09,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:42:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:42:09,739 INFO L87 Difference]: Start difference. First operand 1145 states and 1510 transitions. Second operand 8 states. [2020-10-27 05:42:12,757 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:42:21,527 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-27 05:42:25,785 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:42:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:25,994 INFO L93 Difference]: Finished difference Result 3108 states and 4433 transitions. [2020-10-27 05:42:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:42:25,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-27 05:42:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:26,011 INFO L225 Difference]: With dead ends: 3108 [2020-10-27 05:42:26,012 INFO L226 Difference]: Without dead ends: 2700 [2020-10-27 05:42:26,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:42:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2020-10-27 05:42:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 1181. [2020-10-27 05:42:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2020-10-27 05:42:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1550 transitions. [2020-10-27 05:42:26,122 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1550 transitions. Word has length 70 [2020-10-27 05:42:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:26,123 INFO L481 AbstractCegarLoop]: Abstraction has 1181 states and 1550 transitions. [2020-10-27 05:42:26,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:42:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1550 transitions. [2020-10-27 05:42:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:42:26,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:26,126 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 05:42:26,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:42:26,127 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1825789490, now seen corresponding path program 1 times [2020-10-27 05:42:26,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:26,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231445250] [2020-10-27 05:42:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:26,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:26,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:31,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:42:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:42:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:34,180 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:42:34,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:34,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:34,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:42:34,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231445250] [2020-10-27 05:42:34,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:34,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:42:34,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727993280] [2020-10-27 05:42:34,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:42:34,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:42:34,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:42:34,332 INFO L87 Difference]: Start difference. First operand 1181 states and 1550 transitions. Second operand 6 states. [2020-10-27 05:42:37,271 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:42:44,342 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:42:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:45,256 INFO L93 Difference]: Finished difference Result 2336 states and 3182 transitions. [2020-10-27 05:42:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:42:45,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:42:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:45,264 INFO L225 Difference]: With dead ends: 2336 [2020-10-27 05:42:45,264 INFO L226 Difference]: Without dead ends: 1483 [2020-10-27 05:42:45,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:42:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-10-27 05:42:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1477. [2020-10-27 05:42:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1477 states. [2020-10-27 05:42:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2022 transitions. [2020-10-27 05:42:45,399 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2022 transitions. Word has length 71 [2020-10-27 05:42:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:45,400 INFO L481 AbstractCegarLoop]: Abstraction has 1477 states and 2022 transitions. [2020-10-27 05:42:45,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:42:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2022 transitions. [2020-10-27 05:42:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:42:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:45,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:45,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:42:45,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash -862686468, now seen corresponding path program 1 times [2020-10-27 05:42:45,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:45,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444185142] [2020-10-27 05:42:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:45,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:50,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:50,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:42:50,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:42:50,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 05:42:50,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:42:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:42:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:42:50,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:53,428 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:42:53,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:53,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:42:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:42:53,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444185142] [2020-10-27 05:42:53,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:53,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:42:53,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160068078] [2020-10-27 05:42:53,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:42:53,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:42:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:42:53,607 INFO L87 Difference]: Start difference. First operand 1477 states and 2022 transitions. Second operand 8 states. [2020-10-27 05:42:56,550 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:43:03,842 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-27 05:43:08,686 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:43:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:09,123 INFO L93 Difference]: Finished difference Result 4663 states and 6664 transitions. [2020-10-27 05:43:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:09,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-27 05:43:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:09,141 INFO L225 Difference]: With dead ends: 4663 [2020-10-27 05:43:09,141 INFO L226 Difference]: Without dead ends: 4005 [2020-10-27 05:43:09,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2020-10-27 05:43:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 1543. [2020-10-27 05:43:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-27 05:43:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2104 transitions. [2020-10-27 05:43:09,336 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2104 transitions. Word has length 72 [2020-10-27 05:43:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:09,336 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 2104 transitions. [2020-10-27 05:43:09,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2104 transitions. [2020-10-27 05:43:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:43:09,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:09,340 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 05:43:09,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:43:09,340 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1036076885, now seen corresponding path program 1 times [2020-10-27 05:43:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:09,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840744307] [2020-10-27 05:43:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:09,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:09,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:14,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:14,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:43:14,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:43:14,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 05:43:14,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:14,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:43:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:43:14,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:17,358 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:43:17,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:17,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:17,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:17,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:17,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:43:17,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840744307] [2020-10-27 05:43:17,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:17,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:43:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141626866] [2020-10-27 05:43:17,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:43:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:43:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:43:17,483 INFO L87 Difference]: Start difference. First operand 1543 states and 2104 transitions. Second operand 8 states. [2020-10-27 05:43:20,300 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:43:27,682 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-27 05:43:32,522 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:43:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:32,943 INFO L93 Difference]: Finished difference Result 5211 states and 7428 transitions. [2020-10-27 05:43:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:32,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-27 05:43:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:32,959 INFO L225 Difference]: With dead ends: 5211 [2020-10-27 05:43:32,959 INFO L226 Difference]: Without dead ends: 4490 [2020-10-27 05:43:32,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2020-10-27 05:43:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 1551. [2020-10-27 05:43:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2020-10-27 05:43:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2112 transitions. [2020-10-27 05:43:33,192 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2112 transitions. Word has length 72 [2020-10-27 05:43:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:33,192 INFO L481 AbstractCegarLoop]: Abstraction has 1551 states and 2112 transitions. [2020-10-27 05:43:33,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2112 transitions. [2020-10-27 05:43:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:43:33,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:33,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:43:33,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:43:33,195 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash 497968982, now seen corresponding path program 1 times [2020-10-27 05:43:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:33,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492467510] [2020-10-27 05:43:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:33,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:33,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:43:38,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:43:38,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:43:38,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:41,115 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-27 05:43:41,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:43:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:41,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:41,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:43:41,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:43:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:43:41,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492467510] [2020-10-27 05:43:41,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:43:41,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:43:41,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840888186] [2020-10-27 05:43:41,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:43:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:43:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:43:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:43:41,265 INFO L87 Difference]: Start difference. First operand 1551 states and 2112 transitions. Second operand 8 states. [2020-10-27 05:43:44,173 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-27 05:43:51,446 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-27 05:43:56,323 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-27 05:43:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:43:56,789 INFO L93 Difference]: Finished difference Result 4713 states and 6644 transitions. [2020-10-27 05:43:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:43:56,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-27 05:43:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:43:56,803 INFO L225 Difference]: With dead ends: 4713 [2020-10-27 05:43:56,804 INFO L226 Difference]: Without dead ends: 4025 [2020-10-27 05:43:56,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:43:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2020-10-27 05:43:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 1603. [2020-10-27 05:43:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1603 states. [2020-10-27 05:43:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2184 transitions. [2020-10-27 05:43:57,037 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2184 transitions. Word has length 72 [2020-10-27 05:43:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:43:57,037 INFO L481 AbstractCegarLoop]: Abstraction has 1603 states and 2184 transitions. [2020-10-27 05:43:57,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:43:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2184 transitions. [2020-10-27 05:43:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:43:57,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:43:57,041 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 05:43:57,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:43:57,041 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:43:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:43:57,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1427382203, now seen corresponding path program 1 times [2020-10-27 05:43:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:43:57,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553820105] [2020-10-27 05:43:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:43:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:43:57,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:59,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:59,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:43:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:44:00,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking...