/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.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:21:24,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:21:24,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:21:24,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:21:24,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:21:24,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:21:24,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:21:24,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:21:24,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:21:24,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:21:24,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:21:24,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:21:24,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:21:24,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:21:24,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:21:24,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:21:24,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:21:24,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:21:24,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:21:24,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:21:24,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:21:24,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:21:24,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:21:24,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:21:24,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:21:24,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:21:24,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:21:24,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:21:24,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:21:24,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:21:24,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:21:24,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:21:24,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:21:24,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:21:24,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:21:24,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:21:24,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:21:24,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:21:24,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:21:24,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:21:24,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:21:24,613 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 05:21:24,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:21:24,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:21:24,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:21:24,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:21:24,645 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:21:24,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:21:24,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:21:24,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:21:24,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:21:24,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:21:24,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:21:24,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:21:24,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:21:24,647 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:21:24,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:21:24,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:21:24,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:21:24,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:21:24,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:21:24,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:21:24,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:21:24,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:21:24,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:21:24,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:21:24,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:21:24,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:21:24,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:21:24,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:21:24,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:21:24,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:21:25,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:21:25,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:21:25,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:21:25,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:21:25,116 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:21:25,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:21:25,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fba8c20e/654d355c04ea40949afe495c5fc660ed/FLAG36ed18cbe [2020-10-27 05:21:25,919 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:21:25,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:21:25,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fba8c20e/654d355c04ea40949afe495c5fc660ed/FLAG36ed18cbe [2020-10-27 05:21:26,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fba8c20e/654d355c04ea40949afe495c5fc660ed [2020-10-27 05:21:26,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:21:26,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:21:26,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:21:26,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:21:26,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:21:26,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618b2147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26, skipping insertion in model container [2020-10-27 05:21:26,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:21:26,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:21:26,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:21:26,654 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:21:26,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:21:26,765 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:21:26,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26 WrapperNode [2020-10-27 05:21:26,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:21:26,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:21:26,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:21:26,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:21:26,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (1/1) ... [2020-10-27 05:21:26,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:21:26,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:21:26,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:21:26,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:21:26,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (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 05:21:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:21:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:21:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:21:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:21:26,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:21:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:21:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:21:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:21:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:21:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:21:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:21:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:21:26,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:21:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:21:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:21:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:21:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:21:26,929 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:21:26,930 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:21:26,930 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:21:26,930 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:21:26,930 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:21:26,930 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:21:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:21:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:21:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:21:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:21:26,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:21:26,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:21:28,008 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:21:28,008 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:21:28,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:28 BoogieIcfgContainer [2020-10-27 05:21:28,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:21:28,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:21:28,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:21:28,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:21:28,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:21:26" (1/3) ... [2020-10-27 05:21:28,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ab8fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:28, skipping insertion in model container [2020-10-27 05:21:28,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:21:26" (2/3) ... [2020-10-27 05:21:28,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ab8fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:21:28, skipping insertion in model container [2020-10-27 05:21:28,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:21:28" (3/3) ... [2020-10-27 05:21:28,020 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-27 05:21:28,033 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:21:28,038 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:21:28,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:21:28,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:21:28,081 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:21:28,082 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:21:28,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:21:28,082 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:21:28,082 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:21:28,082 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:21:28,082 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:21:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-10-27 05:21:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:21:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:28,116 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] [2020-10-27 05:21:28,117 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash 691850863, now seen corresponding path program 1 times [2020-10-27 05:21:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:28,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110689943] [2020-10-27 05:21:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:28,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:29,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:32,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:32,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:32,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:33,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:33,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:21:33,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:21:33,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 05:21:33,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:33,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:33,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:33,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:21:33,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:21:33,939 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:33,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:34,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:34,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:34,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 05:21:34,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:34,073 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 05:21:34,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110689943] [2020-10-27 05:21:34,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:34,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108625453] [2020-10-27 05:21:34,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:34,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:34,106 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 6 states. [2020-10-27 05:21:34,506 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:21:35,424 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:21:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:35,744 INFO L93 Difference]: Finished difference Result 363 states and 599 transitions. [2020-10-27 05:21:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:35,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-27 05:21:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:35,773 INFO L225 Difference]: With dead ends: 363 [2020-10-27 05:21:35,773 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 05:21:35,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 05:21:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-27 05:21:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 05:21:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 331 transitions. [2020-10-27 05:21:35,867 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 331 transitions. Word has length 81 [2020-10-27 05:21:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:35,868 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 331 transitions. [2020-10-27 05:21:35,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 331 transitions. [2020-10-27 05:21:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:21:35,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:35,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:35,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:21:35,875 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2068358136, now seen corresponding path program 1 times [2020-10-27 05:21:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:35,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872353617] [2020-10-27 05:21:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:35,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:36,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:39,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:40,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:40,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:21:40,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:21:40,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 05:21:40,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:21:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:21:41,586 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:41,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:41,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:21:41,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:41,676 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 05:21:41,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872353617] [2020-10-27 05:21:41,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:41,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:41,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476735138] [2020-10-27 05:21:41,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:41,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:41,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:41,696 INFO L87 Difference]: Start difference. First operand 231 states and 331 transitions. Second operand 6 states. [2020-10-27 05:21:42,034 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:21:42,829 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:21:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:43,263 INFO L93 Difference]: Finished difference Result 552 states and 829 transitions. [2020-10-27 05:21:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:43,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:21:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:43,271 INFO L225 Difference]: With dead ends: 552 [2020-10-27 05:21:43,272 INFO L226 Difference]: Without dead ends: 371 [2020-10-27 05:21:43,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-27 05:21:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 368. [2020-10-27 05:21:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-27 05:21:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 545 transitions. [2020-10-27 05:21:43,363 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 545 transitions. Word has length 82 [2020-10-27 05:21:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 545 transitions. [2020-10-27 05:21:43,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 545 transitions. [2020-10-27 05:21:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:21:43,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:43,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:21:43,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:21:43,373 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1237394065, now seen corresponding path program 1 times [2020-10-27 05:21:43,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:43,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821505178] [2020-10-27 05:21:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:43,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:44,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:48,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:48,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:21:48,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:21:48,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 05:21:48,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:21:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:21:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:21:48,812 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:48,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:48,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:48,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:48,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:48,885 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 05:21:48,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821505178] [2020-10-27 05:21:48,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:48,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:21:48,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946587582] [2020-10-27 05:21:48,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:21:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:21:48,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:21:48,889 INFO L87 Difference]: Start difference. First operand 368 states and 545 transitions. Second operand 6 states. [2020-10-27 05:21:49,203 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:21:49,963 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:21:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:50,376 INFO L93 Difference]: Finished difference Result 913 states and 1395 transitions. [2020-10-27 05:21:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:21:50,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:21:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:50,381 INFO L225 Difference]: With dead ends: 913 [2020-10-27 05:21:50,382 INFO L226 Difference]: Without dead ends: 603 [2020-10-27 05:21:50,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:21:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-27 05:21:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 600. [2020-10-27 05:21:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-27 05:21:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 904 transitions. [2020-10-27 05:21:50,460 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 904 transitions. Word has length 83 [2020-10-27 05:21:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:50,460 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 904 transitions. [2020-10-27 05:21:50,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:21:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 904 transitions. [2020-10-27 05:21:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:21:50,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:50,463 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] [2020-10-27 05:21:50,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:21:50,464 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 750696632, now seen corresponding path program 1 times [2020-10-27 05:21:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221788524] [2020-10-27 05:21:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:52,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:55,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:55,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:21:55,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:21:55,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:21:55,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:21:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:21:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:21:55,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:21:56,106 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:21:56,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:21:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:56,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:21:56,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:21:56,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:21:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 05:21:56,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:21:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:21:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:21:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:21:56,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:21:56,246 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 05:21:56,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221788524] [2020-10-27 05:21:56,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:21:56,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:21:56,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921504] [2020-10-27 05:21:56,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:21:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:21:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:21:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:21:56,254 INFO L87 Difference]: Start difference. First operand 600 states and 904 transitions. Second operand 10 states. [2020-10-27 05:21:56,633 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:21:57,655 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:21:57,934 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:21:58,838 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:21:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:21:59,061 INFO L93 Difference]: Finished difference Result 1787 states and 2766 transitions. [2020-10-27 05:21:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:21:59,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 05:21:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:21:59,071 INFO L225 Difference]: With dead ends: 1787 [2020-10-27 05:21:59,071 INFO L226 Difference]: Without dead ends: 1290 [2020-10-27 05:21:59,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:21:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-10-27 05:21:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 600. [2020-10-27 05:21:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-27 05:21:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 903 transitions. [2020-10-27 05:21:59,150 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 903 transitions. Word has length 84 [2020-10-27 05:21:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:21:59,150 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 903 transitions. [2020-10-27 05:21:59,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:21:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 903 transitions. [2020-10-27 05:21:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:21:59,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:21:59,153 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] [2020-10-27 05:21:59,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:21:59,154 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:21:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:21:59,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1850064121, now seen corresponding path program 1 times [2020-10-27 05:21:59,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:21:59,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187403722] [2020-10-27 05:21:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:21:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:21:59,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:21:59,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:00,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:01,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:22:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:04,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:22:04,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:04,579 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:04,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:04,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:04,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:04,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:04,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:04,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:22:04,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:22:04,675 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 05:22:04,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187403722] [2020-10-27 05:22:04,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:04,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:04,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957827658] [2020-10-27 05:22:04,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:22:04,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:22:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:22:04,680 INFO L87 Difference]: Start difference. First operand 600 states and 903 transitions. Second operand 6 states. [2020-10-27 05:22:04,982 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:22:05,652 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:22:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:06,066 INFO L93 Difference]: Finished difference Result 1629 states and 2500 transitions. [2020-10-27 05:22:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:22:06,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 05:22:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:06,075 INFO L225 Difference]: With dead ends: 1629 [2020-10-27 05:22:06,075 INFO L226 Difference]: Without dead ends: 1083 [2020-10-27 05:22:06,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:22:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-10-27 05:22:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1080. [2020-10-27 05:22:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-10-27 05:22:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1642 transitions. [2020-10-27 05:22:06,200 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1642 transitions. Word has length 85 [2020-10-27 05:22:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:06,200 INFO L481 AbstractCegarLoop]: Abstraction has 1080 states and 1642 transitions. [2020-10-27 05:22:06,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:22:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1642 transitions. [2020-10-27 05:22:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:22:06,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:06,203 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] [2020-10-27 05:22:06,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:22:06,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:06,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1592798561, now seen corresponding path program 1 times [2020-10-27 05:22:06,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:06,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505351820] [2020-10-27 05:22:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:09,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:11,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:11,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:22:11,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:22:11,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:11,532 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:11,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:11,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:11,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:11,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:22:11,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:11,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:11,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:11,588 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 05:22:11,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505351820] [2020-10-27 05:22:11,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:11,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:22:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82848867] [2020-10-27 05:22:11,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:22:11,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:11,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:22:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:22:11,591 INFO L87 Difference]: Start difference. First operand 1080 states and 1642 transitions. Second operand 6 states. [2020-10-27 05:22:11,917 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:22:12,639 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:22:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:13,133 INFO L93 Difference]: Finished difference Result 3099 states and 4759 transitions. [2020-10-27 05:22:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:22:13,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:22:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:13,145 INFO L225 Difference]: With dead ends: 3099 [2020-10-27 05:22:13,145 INFO L226 Difference]: Without dead ends: 2065 [2020-10-27 05:22:13,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:22:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2020-10-27 05:22:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 2062. [2020-10-27 05:22:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-27 05:22:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3145 transitions. [2020-10-27 05:22:13,388 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3145 transitions. Word has length 86 [2020-10-27 05:22:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 3145 transitions. [2020-10-27 05:22:13,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:22:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3145 transitions. [2020-10-27 05:22:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:22:13,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:13,394 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] [2020-10-27 05:22:13,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:22:13,394 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1168647387, now seen corresponding path program 1 times [2020-10-27 05:22:13,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:13,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973319595] [2020-10-27 05:22:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:13,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:16,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:17,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:18,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:22:18,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 05:22:18,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:18,918 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:18,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:18,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:18,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:18,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:18,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:18,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:22:18,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:18,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:18,999 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 05:22:18,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973319595] [2020-10-27 05:22:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:22:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286731442] [2020-10-27 05:22:19,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:22:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:22:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:22:19,002 INFO L87 Difference]: Start difference. First operand 2062 states and 3145 transitions. Second operand 11 states. [2020-10-27 05:22:19,384 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:22:20,474 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:22:20,814 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:22:22,319 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2020-10-27 05:22:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:22,611 INFO L93 Difference]: Finished difference Result 6671 states and 10255 transitions. [2020-10-27 05:22:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:22:22,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:22:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:22,636 INFO L225 Difference]: With dead ends: 6671 [2020-10-27 05:22:22,636 INFO L226 Difference]: Without dead ends: 4804 [2020-10-27 05:22:22,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:22:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2020-10-27 05:22:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 2062. [2020-10-27 05:22:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-27 05:22:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3137 transitions. [2020-10-27 05:22:22,921 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3137 transitions. Word has length 87 [2020-10-27 05:22:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:22,922 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 3137 transitions. [2020-10-27 05:22:22,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:22:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3137 transitions. [2020-10-27 05:22:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:22:22,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:22,924 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] [2020-10-27 05:22:22,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:22:22,925 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1655961232, now seen corresponding path program 1 times [2020-10-27 05:22:22,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:22,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556772759] [2020-10-27 05:22:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:26,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:27,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:27,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:22:27,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:28,451 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:28,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:28,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:28,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:28,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:22:28,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:28,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:28,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:28,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:28,536 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 05:22:28,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556772759] [2020-10-27 05:22:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:22:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152575123] [2020-10-27 05:22:28,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:22:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:22:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:22:28,539 INFO L87 Difference]: Start difference. First operand 2062 states and 3137 transitions. Second operand 12 states. [2020-10-27 05:22:28,915 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:22:30,674 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:22:31,012 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:22:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:34,542 INFO L93 Difference]: Finished difference Result 11116 states and 16835 transitions. [2020-10-27 05:22:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:22:34,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-10-27 05:22:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:34,592 INFO L225 Difference]: With dead ends: 11116 [2020-10-27 05:22:34,592 INFO L226 Difference]: Without dead ends: 9262 [2020-10-27 05:22:34,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:22:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2020-10-27 05:22:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 2062. [2020-10-27 05:22:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-27 05:22:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3136 transitions. [2020-10-27 05:22:35,055 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3136 transitions. Word has length 88 [2020-10-27 05:22:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:35,055 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 3136 transitions. [2020-10-27 05:22:35,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:22:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3136 transitions. [2020-10-27 05:22:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:22:35,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:35,057 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] [2020-10-27 05:22:35,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:22:35,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2136055030, now seen corresponding path program 1 times [2020-10-27 05:22:35,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:35,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376825022] [2020-10-27 05:22:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:35,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:36,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:37,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:40,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:40,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:22:40,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:22:40,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:22:40,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:22:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:40,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 05:22:40,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:40,524 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:40,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:40,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:40,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:40,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:40,596 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 05:22:40,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376825022] [2020-10-27 05:22:40,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:40,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:22:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731365631] [2020-10-27 05:22:40,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:22:40,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:22:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:22:40,599 INFO L87 Difference]: Start difference. First operand 2062 states and 3136 transitions. Second operand 11 states. [2020-10-27 05:22:40,977 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:22:42,218 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:22:42,537 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:22:44,183 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:22:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:22:44,374 INFO L93 Difference]: Finished difference Result 6658 states and 10228 transitions. [2020-10-27 05:22:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:22:44,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-27 05:22:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:22:44,398 INFO L225 Difference]: With dead ends: 6658 [2020-10-27 05:22:44,398 INFO L226 Difference]: Without dead ends: 4804 [2020-10-27 05:22:44,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:22:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2020-10-27 05:22:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 2062. [2020-10-27 05:22:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-27 05:22:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3135 transitions. [2020-10-27 05:22:44,730 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3135 transitions. Word has length 89 [2020-10-27 05:22:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:22:44,730 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 3135 transitions. [2020-10-27 05:22:44,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:22:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3135 transitions. [2020-10-27 05:22:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:22:44,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:22:44,733 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] [2020-10-27 05:22:44,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:22:44,733 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:22:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:22:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1698825029, now seen corresponding path program 1 times [2020-10-27 05:22:44,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:22:44,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261465250] [2020-10-27 05:22:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:22:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:49,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:49,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:22:49,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:22:49,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:22:49,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:22:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:22:49,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:22:49,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:50,334 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:22:50,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:22:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:22:50,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:22:50,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:22:50,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:22:50,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:22:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:22:50,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:22:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:22:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:22:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:22:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:22:50,414 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 05:22:50,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261465250] [2020-10-27 05:22:50,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:22:50,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:22:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517441210] [2020-10-27 05:22:50,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:22:50,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:22:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:22:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:22:50,416 INFO L87 Difference]: Start difference. First operand 2062 states and 3135 transitions. Second operand 13 states. [2020-10-27 05:22:51,190 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2020-10-27 05:22:51,994 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 05:22:53,657 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 187 [2020-10-27 05:22:54,033 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:22:58,631 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 182 [2020-10-27 05:22:59,005 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:23:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:01,207 INFO L93 Difference]: Finished difference Result 17422 states and 25859 transitions. [2020-10-27 05:23:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 05:23:01,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-10-27 05:23:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:01,253 INFO L225 Difference]: With dead ends: 17422 [2020-10-27 05:23:01,253 INFO L226 Difference]: Without dead ends: 15595 [2020-10-27 05:23:01,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=702, Invalid=2838, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 05:23:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2020-10-27 05:23:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 2086. [2020-10-27 05:23:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2086 states. [2020-10-27 05:23:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 3151 transitions. [2020-10-27 05:23:01,741 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 3151 transitions. Word has length 89 [2020-10-27 05:23:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:01,741 INFO L481 AbstractCegarLoop]: Abstraction has 2086 states and 3151 transitions. [2020-10-27 05:23:01,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:23:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 3151 transitions. [2020-10-27 05:23:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:23:01,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:01,744 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] [2020-10-27 05:23:01,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:23:01,744 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash 683956812, now seen corresponding path program 1 times [2020-10-27 05:23:01,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:01,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772483654] [2020-10-27 05:23:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:01,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:01,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:01,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:02,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:02,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:02,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:04,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:06,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:06,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:23:06,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:23:06,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:23:06,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:23:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 05:23:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:07,458 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:23:07,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:07,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:07,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:07,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:07,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:23:07,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:07,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:07,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:07,536 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 05:23:07,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772483654] [2020-10-27 05:23:07,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:07,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:23:07,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317771296] [2020-10-27 05:23:07,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:23:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:23:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:23:07,539 INFO L87 Difference]: Start difference. First operand 2086 states and 3151 transitions. Second operand 16 states. [2020-10-27 05:23:08,367 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 185 [2020-10-27 05:23:09,234 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 05:23:10,833 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:23:11,541 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2020-10-27 05:23:11,891 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:23:14,638 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:23:15,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:15,353 INFO L93 Difference]: Finished difference Result 8984 states and 13765 transitions. [2020-10-27 05:23:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 05:23:15,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-10-27 05:23:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:15,373 INFO L225 Difference]: With dead ends: 8984 [2020-10-27 05:23:15,373 INFO L226 Difference]: Without dead ends: 7165 [2020-10-27 05:23:15,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:23:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2020-10-27 05:23:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2062. [2020-10-27 05:23:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-27 05:23:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3119 transitions. [2020-10-27 05:23:15,869 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3119 transitions. Word has length 90 [2020-10-27 05:23:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:15,870 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 3119 transitions. [2020-10-27 05:23:15,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:23:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3119 transitions. [2020-10-27 05:23:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:23:15,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:15,872 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] [2020-10-27 05:23:15,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:23:15,872 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1057152154, now seen corresponding path program 1 times [2020-10-27 05:23:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:15,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308353257] [2020-10-27 05:23:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:15,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:15,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:20,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:23:20,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:23:20,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 05:23:20,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:21,421 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:23:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:21,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:21,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:23:21,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:21,483 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 05:23:21,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308353257] [2020-10-27 05:23:21,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:21,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:23:21,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867225253] [2020-10-27 05:23:21,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:23:21,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:23:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:23:21,486 INFO L87 Difference]: Start difference. First operand 2062 states and 3119 transitions. Second operand 13 states. [2020-10-27 05:23:21,917 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:23:24,016 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:23:24,412 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:23:29,429 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:23:29,798 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:23:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:23:31,540 INFO L93 Difference]: Finished difference Result 18598 states and 28137 transitions. [2020-10-27 05:23:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:23:31,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-27 05:23:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:23:31,576 INFO L225 Difference]: With dead ends: 18598 [2020-10-27 05:23:31,576 INFO L226 Difference]: Without dead ends: 16711 [2020-10-27 05:23:31,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 05:23:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16711 states. [2020-10-27 05:23:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16711 to 2068. [2020-10-27 05:23:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2068 states. [2020-10-27 05:23:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 3123 transitions. [2020-10-27 05:23:32,249 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 3123 transitions. Word has length 90 [2020-10-27 05:23:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:23:32,249 INFO L481 AbstractCegarLoop]: Abstraction has 2068 states and 3123 transitions. [2020-10-27 05:23:32,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:23:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 3123 transitions. [2020-10-27 05:23:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:23:32,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:32,252 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 05:23:32,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:23:32,252 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 658343801, now seen corresponding path program 1 times [2020-10-27 05:23:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:32,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997872592] [2020-10-27 05:23:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:32,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:32,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:23:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:23:37,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:37,859 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-10-27 05:23:38,170 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-27 05:23:38,489 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-27 05:23:38,802 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-27 05:23:39,020 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-27 05:23:39,353 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-27 05:23:40,662 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:23:40,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:40,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:40,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:40,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:23:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:40,793 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 05:23:40,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997872592] [2020-10-27 05:23:40,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:40,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:23:40,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472209499] [2020-10-27 05:23:40,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:23:40,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:23:40,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:23:40,796 INFO L87 Difference]: Start difference. First operand 2068 states and 3123 transitions. Second operand 28 states. [2020-10-27 05:23:41,264 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-10-27 05:23:42,564 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 246 DAG size of output: 242 [2020-10-27 05:23:43,667 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-27 05:23:43,911 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 05:23:44,289 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-27 05:23:44,705 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-27 05:23:45,307 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2020-10-27 05:23:46,006 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 111 [2020-10-27 05:23:46,828 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2020-10-27 05:23:47,468 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 05:23:47,719 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-27 05:23:47,961 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 05:23:51,055 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:23:51,545 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:23:52,023 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:23:52,457 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:23:52,894 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:23:53,522 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:24:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:01,964 INFO L93 Difference]: Finished difference Result 9421 states and 14470 transitions. [2020-10-27 05:24:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 05:24:01,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-27 05:24:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:01,982 INFO L225 Difference]: With dead ends: 9421 [2020-10-27 05:24:01,982 INFO L226 Difference]: Without dead ends: 7606 [2020-10-27 05:24:01,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 05:24:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2020-10-27 05:24:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 2072. [2020-10-27 05:24:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2020-10-27 05:24:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3125 transitions. [2020-10-27 05:24:02,585 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3125 transitions. Word has length 91 [2020-10-27 05:24:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:02,586 INFO L481 AbstractCegarLoop]: Abstraction has 2072 states and 3125 transitions. [2020-10-27 05:24:02,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 05:24:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3125 transitions. [2020-10-27 05:24:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 05:24:02,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:02,587 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 05:24:02,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:24:02,588 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash 37146369, now seen corresponding path program 1 times [2020-10-27 05:24:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:02,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12641464] [2020-10-27 05:24:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:03,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:07,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4399 [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:24:07,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:07,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:24:07,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:07,594 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:07,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:07,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:07,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:07,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:24:07,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:07,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:07,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:07,673 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 05:24:07,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12641464] [2020-10-27 05:24:07,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:07,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:24:07,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230381636] [2020-10-27 05:24:07,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:24:07,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:07,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:24:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:07,677 INFO L87 Difference]: Start difference. First operand 2072 states and 3125 transitions. Second operand 11 states. [2020-10-27 05:24:08,079 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:24:09,462 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:24:09,829 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 05:24:12,025 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:24:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:12,492 INFO L93 Difference]: Finished difference Result 6663 states and 10205 transitions. [2020-10-27 05:24:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:24:12,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2020-10-27 05:24:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:12,503 INFO L225 Difference]: With dead ends: 6663 [2020-10-27 05:24:12,503 INFO L226 Difference]: Without dead ends: 4814 [2020-10-27 05:24:12,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:24:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2020-10-27 05:24:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 2066. [2020-10-27 05:24:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2020-10-27 05:24:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3117 transitions. [2020-10-27 05:24:13,081 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3117 transitions. Word has length 91 [2020-10-27 05:24:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:13,082 INFO L481 AbstractCegarLoop]: Abstraction has 2066 states and 3117 transitions. [2020-10-27 05:24:13,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:24:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3117 transitions. [2020-10-27 05:24:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:24:13,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:13,083 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 05:24:13,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:24:13,083 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1909981645, now seen corresponding path program 1 times [2020-10-27 05:24:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:13,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983246137] [2020-10-27 05:24:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:13,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:15,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 05:24:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:18,392 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 18 [2020-10-27 05:24:18,829 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:18,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:18,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:18,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:18,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:18,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:24:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:18,911 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 05:24:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983246137] [2020-10-27 05:24:18,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:18,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:24:18,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414378663] [2020-10-27 05:24:18,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:24:18,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:24:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:24:18,913 INFO L87 Difference]: Start difference. First operand 2066 states and 3117 transitions. Second operand 9 states. [2020-10-27 05:24:19,272 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:24:20,500 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 05:24:20,866 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:24:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:22,289 INFO L93 Difference]: Finished difference Result 4883 states and 7450 transitions. [2020-10-27 05:24:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:24:22,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-10-27 05:24:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:22,295 INFO L225 Difference]: With dead ends: 4883 [2020-10-27 05:24:22,295 INFO L226 Difference]: Without dead ends: 2981 [2020-10-27 05:24:22,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:24:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2020-10-27 05:24:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2066. [2020-10-27 05:24:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2020-10-27 05:24:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3116 transitions. [2020-10-27 05:24:22,957 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3116 transitions. Word has length 92 [2020-10-27 05:24:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:22,958 INFO L481 AbstractCegarLoop]: Abstraction has 2066 states and 3116 transitions. [2020-10-27 05:24:22,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:24:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3116 transitions. [2020-10-27 05:24:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:24:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:22,959 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 05:24:22,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:24:22,960 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2043995151, now seen corresponding path program 1 times [2020-10-27 05:24:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:22,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724832315] [2020-10-27 05:24:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:23,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:23,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:24:23,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:24:23,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-27 05:24:23,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:24:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:24:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:24:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:23,978 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:23,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:23,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:23,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:24,025 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 05:24:24,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724832315] [2020-10-27 05:24:24,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:24,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:24:24,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402146232] [2020-10-27 05:24:24,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:24:24,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:24,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:24:24,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:24:24,027 INFO L87 Difference]: Start difference. First operand 2066 states and 3116 transitions. Second operand 8 states. [2020-10-27 05:24:24,393 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 05:24:25,533 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:24:25,864 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 05:24:26,210 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:24:26,595 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:24:27,146 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 05:24:27,531 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 05:24:27,881 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 05:24:32,803 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 05:24:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:34,104 INFO L93 Difference]: Finished difference Result 20403 states and 31429 transitions. [2020-10-27 05:24:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:24:34,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2020-10-27 05:24:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:34,128 INFO L225 Difference]: With dead ends: 20403 [2020-10-27 05:24:34,128 INFO L226 Difference]: Without dead ends: 18592 [2020-10-27 05:24:34,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:24:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18592 states. [2020-10-27 05:24:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18592 to 4007. [2020-10-27 05:24:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4007 states. [2020-10-27 05:24:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 6027 transitions. [2020-10-27 05:24:35,449 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 6027 transitions. Word has length 92 [2020-10-27 05:24:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:35,450 INFO L481 AbstractCegarLoop]: Abstraction has 4007 states and 6027 transitions. [2020-10-27 05:24:35,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:24:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 6027 transitions. [2020-10-27 05:24:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:24:35,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:35,453 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 05:24:35,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:24:35,454 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 825910453, now seen corresponding path program 1 times [2020-10-27 05:24:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:35,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550737881] [2020-10-27 05:24:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:35,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:38,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:39,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:24:40,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:24:40,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:41,037 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:41,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:41,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:41,099 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 05:24:41,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550737881] [2020-10-27 05:24:41,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:41,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:24:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25040323] [2020-10-27 05:24:41,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:24:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:24:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:24:41,110 INFO L87 Difference]: Start difference. First operand 4007 states and 6027 transitions. Second operand 10 states. [2020-10-27 05:24:41,477 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:42,978 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:24:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:45,066 INFO L93 Difference]: Finished difference Result 9507 states and 14421 transitions. [2020-10-27 05:24:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:24:45,067 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-10-27 05:24:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:45,073 INFO L225 Difference]: With dead ends: 9507 [2020-10-27 05:24:45,073 INFO L226 Difference]: Without dead ends: 5812 [2020-10-27 05:24:45,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:24:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2020-10-27 05:24:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 3985. [2020-10-27 05:24:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3985 states. [2020-10-27 05:24:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5991 transitions. [2020-10-27 05:24:46,409 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5991 transitions. Word has length 92 [2020-10-27 05:24:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:46,409 INFO L481 AbstractCegarLoop]: Abstraction has 3985 states and 5991 transitions. [2020-10-27 05:24:46,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:24:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5991 transitions. [2020-10-27 05:24:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 05:24:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:46,411 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 05:24:46,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:24:46,412 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -79416012, now seen corresponding path program 1 times [2020-10-27 05:24:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:46,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380644075] [2020-10-27 05:24:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:46,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:46,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:46,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 05:24:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:24:51,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:24:51,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:51,932 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-27 05:24:52,065 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2020-10-27 05:24:52,276 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-27 05:24:52,601 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-27 05:24:52,767 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-27 05:24:52,997 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 05:24:53,303 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-27 05:24:54,435 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 05:24:54,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:54,519 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 05:24:54,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380644075] [2020-10-27 05:24:54,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:54,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-27 05:24:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847487734] [2020-10-27 05:24:54,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 05:24:54,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 05:24:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:24:54,521 INFO L87 Difference]: Start difference. First operand 3985 states and 5991 transitions. Second operand 28 states. [2020-10-27 05:24:54,951 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-27 05:24:56,312 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 239 DAG size of output: 233 [2020-10-27 05:24:57,300 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-27 05:24:57,683 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-27 05:24:58,084 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-27 05:24:58,585 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-27 05:24:59,116 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 85 [2020-10-27 05:24:59,714 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 88 [2020-10-27 05:25:00,342 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 98 [2020-10-27 05:25:01,092 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 103 [2020-10-27 05:25:01,315 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-27 05:25:01,546 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-10-27 05:25:01,832 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 05:25:02,112 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 05:25:02,532 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 05:25:02,722 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-27 05:25:03,016 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 05:25:03,260 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-27 05:25:05,979 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:25:06,393 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:25:06,950 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 184