/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:55:55,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:55:55,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:55:55,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:55:55,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:55:55,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:55:55,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:55:55,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:55:55,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:55:55,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:55:55,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:55:55,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:55:55,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:55:55,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:55:55,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:55:55,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:55:55,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:55:55,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:55:55,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:55:55,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:55:55,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:55:55,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:55:55,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:55:55,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:55:55,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:55:55,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:55:55,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:55:55,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:55:55,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:55:55,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:55:55,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:55:55,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:55:55,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:55:55,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:55:55,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:55:55,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:55:55,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:55:55,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:55:55,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:55:55,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:55:55,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:55:55,692 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 23:55:55,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:55:55,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:55:55,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:55:55,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:55:55,753 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:55:55,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:55:55,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:55:55,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:55:55,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:55:55,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:55:55,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:55:55,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:55:55,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:55:55,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:55:55,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:55:55,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:55:55,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:55:55,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:55:55,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:55:55,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:55:55,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:55:55,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:55:55,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:55:55,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:55:55,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:55:55,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:55:55,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:55:55,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:55:55,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:55:55,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:55:56,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:55:56,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:55:56,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:55:56,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:55:56,240 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:55:56,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 23:55:56,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc7b0fc0/6e89b0921f144d0d8119632c9fcf3660/FLAGeb98c6d1a [2020-10-27 23:55:57,392 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:55:57,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 23:55:57,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc7b0fc0/6e89b0921f144d0d8119632c9fcf3660/FLAGeb98c6d1a [2020-10-27 23:55:57,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc7b0fc0/6e89b0921f144d0d8119632c9fcf3660 [2020-10-27 23:55:57,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:55:57,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:55:57,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:55:57,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:55:57,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:55:57,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:55:57" (1/1) ... [2020-10-27 23:55:57,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbf43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:55:57, skipping insertion in model container [2020-10-27 23:55:57,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:55:57" (1/1) ... [2020-10-27 23:55:57,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:55:58,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:55:59,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:55:59,430 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:56:00,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:56:00,130 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:56:00,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00 WrapperNode [2020-10-27 23:56:00,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:56:00,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:56:00,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:56:00,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:56:00,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (1/1) ... [2020-10-27 23:56:00,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:56:00,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:56:00,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:56:00,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:56:00,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (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 23:56:00,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:56:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:56:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:56:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:56:00,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:56:00,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:56:00,483 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:56:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:56:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:56:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:56:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:56:00,484 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:56:00,485 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:56:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:56:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:56:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:56:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:56:00,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:56:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:56:00,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:56:04,578 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:56:04,579 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:56:04,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:56:04 BoogieIcfgContainer [2020-10-27 23:56:04,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:56:04,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:56:04,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:56:04,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:56:04,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:55:57" (1/3) ... [2020-10-27 23:56:04,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:56:04, skipping insertion in model container [2020-10-27 23:56:04,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:56:00" (2/3) ... [2020-10-27 23:56:04,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:56:04, skipping insertion in model container [2020-10-27 23:56:04,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:56:04" (3/3) ... [2020-10-27 23:56:04,597 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+lhb-reducer.c [2020-10-27 23:56:04,610 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:56:04,617 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:56:04,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:56:04,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:56:04,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:56:04,670 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:56:04,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:56:04,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:56:04,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:56:04,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:56:04,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:56:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states. [2020-10-27 23:56:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 23:56:04,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:04,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:04,746 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2046227063, now seen corresponding path program 1 times [2020-10-27 23:56:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:04,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300082297] [2020-10-27 23:56:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:06,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:06,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:08,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:10,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:10,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 23:56:10,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:56:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:56:10,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:56:10,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:56:10,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:56:12,211 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:56:12,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:12,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 23:56:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:56:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:12,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300082297] [2020-10-27 23:56:12,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:12,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:12,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892301209] [2020-10-27 23:56:12,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:12,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:12,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:12,395 INFO L87 Difference]: Start difference. First operand 1140 states. Second operand 7 states. [2020-10-27 23:56:14,465 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:56:31,169 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:56:33,273 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:56:35,558 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:56:37,381 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:56:40,550 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 23:56:42,417 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:56:44,615 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 522 [2020-10-27 23:56:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:44,735 INFO L93 Difference]: Finished difference Result 3268 states and 5598 transitions. [2020-10-27 23:56:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:44,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-27 23:56:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:44,787 INFO L225 Difference]: With dead ends: 3268 [2020-10-27 23:56:44,788 INFO L226 Difference]: Without dead ends: 2569 [2020-10-27 23:56:44,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2020-10-27 23:56:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1750. [2020-10-27 23:56:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2020-10-27 23:56:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2368 transitions. [2020-10-27 23:56:44,979 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2368 transitions. Word has length 91 [2020-10-27 23:56:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:44,980 INFO L481 AbstractCegarLoop]: Abstraction has 1750 states and 2368 transitions. [2020-10-27 23:56:44,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2368 transitions. [2020-10-27 23:56:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:56:44,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:44,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:44,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:56:44,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash 415124163, now seen corresponding path program 1 times [2020-10-27 23:56:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:44,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808804484] [2020-10-27 23:56:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:48,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:50,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:50,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 23:56:50,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:56:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:56:50,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:50,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:56:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:56:50,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:56:51,904 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:56:51,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:51,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:51,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:51,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 23:56:51,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:51,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:52,003 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 23:56:52,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808804484] [2020-10-27 23:56:52,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:52,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130113462] [2020-10-27 23:56:52,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:52,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:52,008 INFO L87 Difference]: Start difference. First operand 1750 states and 2368 transitions. Second operand 7 states. [2020-10-27 23:56:53,809 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:05,371 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:07,434 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:57:09,563 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:57:11,560 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:57:15,026 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 23:57:16,783 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:18,735 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 522 [2020-10-27 23:57:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:18,781 INFO L93 Difference]: Finished difference Result 7220 states and 10348 transitions. [2020-10-27 23:57:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:57:18,789 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 23:57:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:18,820 INFO L225 Difference]: With dead ends: 7220 [2020-10-27 23:57:18,820 INFO L226 Difference]: Without dead ends: 5851 [2020-10-27 23:57:18,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:57:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2020-10-27 23:57:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 3755. [2020-10-27 23:57:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3755 states. [2020-10-27 23:57:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 5352 transitions. [2020-10-27 23:57:19,080 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 5352 transitions. Word has length 92 [2020-10-27 23:57:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:19,080 INFO L481 AbstractCegarLoop]: Abstraction has 3755 states and 5352 transitions. [2020-10-27 23:57:19,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:57:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 5352 transitions. [2020-10-27 23:57:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:57:19,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:19,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:57:19,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:57:19,091 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:19,092 INFO L82 PathProgramCache]: Analyzing trace with hash -381566513, now seen corresponding path program 1 times [2020-10-27 23:57:19,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:19,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476897950] [2020-10-27 23:57:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:19,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:19,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:19,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:21,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:24,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:57:24,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:57:24,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:57:24,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:24,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:57:24,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:57:24,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:57:24,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:25,974 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:57:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:25,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:26,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:26,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:26,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:57:26,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:26,064 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 23:57:26,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476897950] [2020-10-27 23:57:26,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:26,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:57:26,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077628534] [2020-10-27 23:57:26,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:57:26,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:26,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:57:26,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:57:26,067 INFO L87 Difference]: Start difference. First operand 3755 states and 5352 transitions. Second operand 7 states. [2020-10-27 23:57:27,886 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:35,773 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:57:37,775 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:39,879 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:57:41,779 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:57:44,822 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:57:46,600 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 23:57:48,618 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 522 [2020-10-27 23:57:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:48,716 INFO L93 Difference]: Finished difference Result 9280 states and 13415 transitions. [2020-10-27 23:57:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:57:48,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-27 23:57:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:48,756 INFO L225 Difference]: With dead ends: 9280 [2020-10-27 23:57:48,757 INFO L226 Difference]: Without dead ends: 7924 [2020-10-27 23:57:48,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:57:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7924 states. [2020-10-27 23:57:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7924 to 4624. [2020-10-27 23:57:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4624 states. [2020-10-27 23:57:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 6658 transitions. [2020-10-27 23:57:49,125 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 6658 transitions. Word has length 93 [2020-10-27 23:57:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:49,125 INFO L481 AbstractCegarLoop]: Abstraction has 4624 states and 6658 transitions. [2020-10-27 23:57:49,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:57:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 6658 transitions. [2020-10-27 23:57:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:57:49,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:49,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:57:49,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:57:49,136 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -923432843, now seen corresponding path program 1 times [2020-10-27 23:57:49,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:49,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337864267] [2020-10-27 23:57:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:49,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:49,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:52,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:54,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:57:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:56,147 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:57:56,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:56,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:56,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:56,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:56,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:56,234 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 23:57:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337864267] [2020-10-27 23:57:56,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:56,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:57:56,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613168017] [2020-10-27 23:57:56,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:57:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:57:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:57:56,236 INFO L87 Difference]: Start difference. First operand 4624 states and 6658 transitions. Second operand 7 states. [2020-10-27 23:57:58,184 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:06,665 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:58:08,916 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:11,126 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:58:12,997 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:58:16,079 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:17,942 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 23:58:20,134 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 522 [2020-10-27 23:58:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:20,230 INFO L93 Difference]: Finished difference Result 8344 states and 12047 transitions. [2020-10-27 23:58:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:58:20,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-27 23:58:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:20,260 INFO L225 Difference]: With dead ends: 8344 [2020-10-27 23:58:20,260 INFO L226 Difference]: Without dead ends: 6466 [2020-10-27 23:58:20,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:58:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6466 states. [2020-10-27 23:58:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6466 to 4053. [2020-10-27 23:58:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-10-27 23:58:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 5777 transitions. [2020-10-27 23:58:20,518 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 5777 transitions. Word has length 93 [2020-10-27 23:58:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:20,518 INFO L481 AbstractCegarLoop]: Abstraction has 4053 states and 5777 transitions. [2020-10-27 23:58:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:58:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 5777 transitions. [2020-10-27 23:58:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:58:20,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:20,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:58:20,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:58:20,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash 211255507, now seen corresponding path program 1 times [2020-10-27 23:58:20,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:20,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999672747] [2020-10-27 23:58:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:20,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:20,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:25,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:25,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:58:25,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 23:58:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:27,519 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:58:27,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:27,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:27,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:27,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 23:58:27,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:27,613 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 23:58:27,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999672747] [2020-10-27 23:58:27,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:27,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:58:27,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919698045] [2020-10-27 23:58:27,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:58:27,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:27,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:58:27,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:58:27,615 INFO L87 Difference]: Start difference. First operand 4053 states and 5777 transitions. Second operand 7 states. [2020-10-27 23:58:29,430 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:37,434 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:58:39,511 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:41,575 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:58:43,441 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:58:46,440 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 520 [2020-10-27 23:58:48,252 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:58:50,334 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 522 [2020-10-27 23:58:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:58:50,375 INFO L93 Difference]: Finished difference Result 10511 states and 15305 transitions. [2020-10-27 23:58:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:58:50,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-27 23:58:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:58:50,408 INFO L225 Difference]: With dead ends: 10511 [2020-10-27 23:58:50,408 INFO L226 Difference]: Without dead ends: 9153 [2020-10-27 23:58:50,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:58:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2020-10-27 23:58:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 4759. [2020-10-27 23:58:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4759 states. [2020-10-27 23:58:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 6815 transitions. [2020-10-27 23:58:50,704 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 6815 transitions. Word has length 93 [2020-10-27 23:58:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:58:50,705 INFO L481 AbstractCegarLoop]: Abstraction has 4759 states and 6815 transitions. [2020-10-27 23:58:50,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:58:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 6815 transitions. [2020-10-27 23:58:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:58:50,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:58:50,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:58:50,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:58:50,715 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:58:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:58:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -330610823, now seen corresponding path program 1 times [2020-10-27 23:58:50,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:58:50,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121466302] [2020-10-27 23:58:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:58:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:50,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:50,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:51,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:52,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:54,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:55,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:55,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:58:55,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 23:58:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:58:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:57,801 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:58:57,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:58:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:58:57,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:58:57,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:58:57,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:58:57,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:58:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:58:57,888 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 23:58:57,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121466302] [2020-10-27 23:58:57,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:58:57,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:58:57,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481337807] [2020-10-27 23:58:57,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:58:57,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:58:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:58:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:58:57,890 INFO L87 Difference]: Start difference. First operand 4759 states and 6815 transitions. Second operand 9 states. [2020-10-27 23:58:59,755 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:59:07,323 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 519 [2020-10-27 23:59:10,559 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 518 [2020-10-27 23:59:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:59:10,871 INFO L93 Difference]: Finished difference Result 14415 states and 21391 transitions. [2020-10-27 23:59:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:59:10,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-10-27 23:59:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:59:10,899 INFO L225 Difference]: With dead ends: 14415 [2020-10-27 23:59:10,899 INFO L226 Difference]: Without dead ends: 12093 [2020-10-27 23:59:10,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:59:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12093 states. [2020-10-27 23:59:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12093 to 4776. [2020-10-27 23:59:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4776 states. [2020-10-27 23:59:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 6819 transitions. [2020-10-27 23:59:11,364 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 6819 transitions. Word has length 93 [2020-10-27 23:59:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:59:11,365 INFO L481 AbstractCegarLoop]: Abstraction has 4776 states and 6819 transitions. [2020-10-27 23:59:11,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:59:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 6819 transitions. [2020-10-27 23:59:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:59:11,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:59:11,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:59:11,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:59:11,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:59:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:59:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -44421406, now seen corresponding path program 1 times [2020-10-27 23:59:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:59:11,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741517876] [2020-10-27 23:59:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:59:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:11,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:12,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:16,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 23:59:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:18,246 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 517 [2020-10-27 23:59:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:59:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:59:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:59:18,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:59:18,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:59:18,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:59:18,333 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 23:59:18,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741517876] [2020-10-27 23:59:18,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:59:18,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:59:18,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787860949] [2020-10-27 23:59:18,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:59:18,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:59:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:59:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:59:18,335 INFO L87 Difference]: Start difference. First operand 4776 states and 6819 transitions. Second operand 7 states. [2020-10-27 23:59:20,159 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:59:28,273 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 523 [2020-10-27 23:59:30,543 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 521 [2020-10-27 23:59:32,598 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 518