/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:54:29,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:54:29,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:54:29,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:54:29,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:54:29,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:54:29,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:54:29,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:54:29,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:54:29,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:54:29,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:54:29,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:54:29,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:54:29,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:54:29,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:54:29,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:54:29,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:54:29,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:54:29,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:54:29,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:54:29,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:54:29,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:54:29,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:54:29,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:54:29,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:54:29,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:54:29,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:54:29,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:54:29,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:54:29,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:54:29,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:54:29,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:54:29,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:54:29,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:54:29,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:54:29,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:54:29,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:54:29,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:54:29,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:54:29,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:54:29,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:54:29,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:54:29,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:54:29,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:54:29,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:54:29,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:54:29,177 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:54:29,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:54:29,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:54:29,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:54:29,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:54:29,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:54:29,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:54:29,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:54:29,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:54:29,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:54:29,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:54:29,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:54:29,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:54:29,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:54:29,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:54:29,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:54:29,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:54:29,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:54:29,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:54:29,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:54:29,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:54:29,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:54:29,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:54:29,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:54:29,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:54:29,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:54:29,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:54:29,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:54:29,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:54:29,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:54:29,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:54:29,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:54:29,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bae22866/969f02c74c074d079940358d51feacc5/FLAG167cd45a6 [2020-10-27 23:54:30,754 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:54:30,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:54:30,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bae22866/969f02c74c074d079940358d51feacc5/FLAG167cd45a6 [2020-10-27 23:54:31,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bae22866/969f02c74c074d079940358d51feacc5 [2020-10-27 23:54:31,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:54:31,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:54:31,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:54:31,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:54:31,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:54:31,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:54:31" (1/1) ... [2020-10-27 23:54:31,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ccef6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:31, skipping insertion in model container [2020-10-27 23:54:31,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:54:31" (1/1) ... [2020-10-27 23:54:31,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:54:31,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:54:32,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:54:32,946 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:54:33,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:54:33,569 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:54:33,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33 WrapperNode [2020-10-27 23:54:33,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:54:33,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:54:33,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:54:33,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:54:33,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... [2020-10-27 23:54:33,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:54:33,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:54:33,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:54:33,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:54:33,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:54:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:54:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:54:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:54:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:54:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:54:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:54:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:54:33,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:54:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:54:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:54:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:54:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:54:33,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:54:37,916 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:54:37,916 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:54:37,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:54:37 BoogieIcfgContainer [2020-10-27 23:54:37,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:54:37,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:54:37,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:54:37,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:54:37,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:54:31" (1/3) ... [2020-10-27 23:54:37,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aa6333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:54:37, skipping insertion in model container [2020-10-27 23:54:37,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:54:33" (2/3) ... [2020-10-27 23:54:37,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38aa6333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:54:37, skipping insertion in model container [2020-10-27 23:54:37,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:54:37" (3/3) ... [2020-10-27 23:54:37,930 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:54:37,943 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:54:37,949 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:54:37,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:54:37,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:54:37,999 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:54:37,999 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:54:37,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:54:37,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:54:37,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:54:38,000 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:54:38,000 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:54:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states. [2020-10-27 23:54:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 23:54:38,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:54:38,066 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 23:54:38,066 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:54:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:54:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1673233271, now seen corresponding path program 1 times [2020-10-27 23:54:38,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:54:38,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051745188] [2020-10-27 23:54:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:54:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:38,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:39,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:40,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:41,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:42,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:42,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:43,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:43,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 23:54:43,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:54:43,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:54:43,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:54:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:54:43,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:54:43,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:54:45,448 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:54:45,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:54:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:54:45,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:54:45,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:54:45,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:54:45,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:54:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 23:54:45,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:54:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:54:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:54:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:54:45,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:54:45,588 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 23:54:45,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051745188] [2020-10-27 23:54:45,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:54:45,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:54:45,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541904207] [2020-10-27 23:54:45,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:54:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:54:45,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:54:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:54:45,615 INFO L87 Difference]: Start difference. First operand 1133 states. Second operand 7 states. [2020-10-27 23:54:47,357 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:54:59,987 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:55:01,968 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:03,851 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:55:05,518 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:55:08,238 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:09,966 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:55:11,957 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:55:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:12,064 INFO L93 Difference]: Finished difference Result 3224 states and 5556 transitions. [2020-10-27 23:55:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:55:12,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 90 [2020-10-27 23:55:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:12,149 INFO L225 Difference]: With dead ends: 3224 [2020-10-27 23:55:12,149 INFO L226 Difference]: Without dead ends: 2543 [2020-10-27 23:55:12,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:55:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2020-10-27 23:55:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1731. [2020-10-27 23:55:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2020-10-27 23:55:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2352 transitions. [2020-10-27 23:55:12,389 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2352 transitions. Word has length 90 [2020-10-27 23:55:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:12,393 INFO L481 AbstractCegarLoop]: Abstraction has 1731 states and 2352 transitions. [2020-10-27 23:55:12,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:55:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2352 transitions. [2020-10-27 23:55:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 23:55:12,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:12,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:55:12,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:55:12,406 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash -851814465, now seen corresponding path program 1 times [2020-10-27 23:55:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:12,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079455990] [2020-10-27 23:55:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:12,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:12,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:13,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:15,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:17,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:17,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 23:55:17,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:55:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:55:17,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:55:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:55:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:55:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:19,183 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:55:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:19,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:19,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:19,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:19,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:55:19,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:19,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:19,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:19,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079455990] [2020-10-27 23:55:19,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:19,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:55:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431660864] [2020-10-27 23:55:19,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:55:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:55:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:55:19,289 INFO L87 Difference]: Start difference. First operand 1731 states and 2352 transitions. Second operand 7 states. [2020-10-27 23:55:20,951 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:30,075 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:55:32,303 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:34,129 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:55:35,741 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:55:38,548 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:40,133 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:55:41,989 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:55:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:55:42,056 INFO L93 Difference]: Finished difference Result 5083 states and 7173 transitions. [2020-10-27 23:55:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:55:42,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-27 23:55:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:55:42,083 INFO L225 Difference]: With dead ends: 5083 [2020-10-27 23:55:42,083 INFO L226 Difference]: Without dead ends: 4332 [2020-10-27 23:55:42,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:55:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2020-10-27 23:55:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 2560. [2020-10-27 23:55:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2020-10-27 23:55:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3596 transitions. [2020-10-27 23:55:42,228 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3596 transitions. Word has length 91 [2020-10-27 23:55:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:55:42,229 INFO L481 AbstractCegarLoop]: Abstraction has 2560 states and 3596 transitions. [2020-10-27 23:55:42,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:55:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3596 transitions. [2020-10-27 23:55:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 23:55:42,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:55:42,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:55:42,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:55:42,236 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:55:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:55:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1393680795, now seen corresponding path program 1 times [2020-10-27 23:55:42,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:55:42,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123535341] [2020-10-27 23:55:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:55:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:42,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:42,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:42,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:42,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:44,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:44,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:47,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:47,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 23:55:47,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:55:47,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:48,997 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:55:49,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:55:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:55:49,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:55:49,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:55:49,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:55:49,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:55:49,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 23:55:49,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:55:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:55:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:55:49,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:55:49,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:55:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:55:49,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123535341] [2020-10-27 23:55:49,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:55:49,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:55:49,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405426987] [2020-10-27 23:55:49,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:55:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:55:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:55:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:55:49,108 INFO L87 Difference]: Start difference. First operand 2560 states and 3596 transitions. Second operand 7 states. [2020-10-27 23:55:50,964 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:55:59,668 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:56:01,728 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:03,691 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:56:05,420 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:56:08,323 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:10,066 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:56:12,104 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:56:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:12,183 INFO L93 Difference]: Finished difference Result 5635 states and 8072 transitions. [2020-10-27 23:56:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:12,183 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-27 23:56:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:12,205 INFO L225 Difference]: With dead ends: 5635 [2020-10-27 23:56:12,206 INFO L226 Difference]: Without dead ends: 4700 [2020-10-27 23:56:12,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2020-10-27 23:56:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 2943. [2020-10-27 23:56:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2943 states. [2020-10-27 23:56:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4157 transitions. [2020-10-27 23:56:12,376 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4157 transitions. Word has length 91 [2020-10-27 23:56:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:12,376 INFO L481 AbstractCegarLoop]: Abstraction has 2943 states and 4157 transitions. [2020-10-27 23:56:12,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4157 transitions. [2020-10-27 23:56:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:56:12,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:12,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:12,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:56:12,383 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash 547319897, now seen corresponding path program 1 times [2020-10-27 23:56:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:12,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30504124] [2020-10-27 23:56:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:13,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:13,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:17,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:17,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 23:56:17,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:56:17,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 23:56:17,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:56:17,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:56:17,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:19,311 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:56:19,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:19,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:19,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:19,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:19,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 23:56:19,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:19,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:19,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30504124] [2020-10-27 23:56:19,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:19,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538538876] [2020-10-27 23:56:19,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:19,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:19,408 INFO L87 Difference]: Start difference. First operand 2943 states and 4157 transitions. Second operand 7 states. [2020-10-27 23:56:21,162 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:28,917 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:56:30,886 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:32,540 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:56:34,208 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:56:36,983 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:38,653 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:56:40,498 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:56:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:56:40,558 INFO L93 Difference]: Finished difference Result 9050 states and 13104 transitions. [2020-10-27 23:56:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:56:40,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 23:56:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:56:40,592 INFO L225 Difference]: With dead ends: 9050 [2020-10-27 23:56:40,592 INFO L226 Difference]: Without dead ends: 8012 [2020-10-27 23:56:40,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:56:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2020-10-27 23:56:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 4002. [2020-10-27 23:56:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4002 states. [2020-10-27 23:56:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5738 transitions. [2020-10-27 23:56:40,878 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5738 transitions. Word has length 92 [2020-10-27 23:56:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:56:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 4002 states and 5738 transitions. [2020-10-27 23:56:40,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:56:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5738 transitions. [2020-10-27 23:56:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:56:40,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:56:40,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:56:40,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:56:40,887 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:56:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:56:40,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1136944659, now seen corresponding path program 1 times [2020-10-27 23:56:40,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:56:40,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988780276] [2020-10-27 23:56:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:56:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:40,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:41,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:41,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:42,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:45,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:45,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 23:56:45,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:56:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 23:56:45,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:56:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:56:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:56:45,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:47,720 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:56:47,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:56:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:56:47,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:56:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:56:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:56:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:56:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:56:47,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988780276] [2020-10-27 23:56:47,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:56:47,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:56:47,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207438807] [2020-10-27 23:56:47,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:56:47,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:56:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:56:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:56:47,811 INFO L87 Difference]: Start difference. First operand 4002 states and 5738 transitions. Second operand 7 states. [2020-10-27 23:56:49,708 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:56:57,394 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:56:59,481 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:01,218 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:57:02,879 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:57:05,739 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:07,349 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:57:09,230 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:57:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:09,287 INFO L93 Difference]: Finished difference Result 9520 states and 13932 transitions. [2020-10-27 23:57:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:57:09,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 23:57:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:09,322 INFO L225 Difference]: With dead ends: 9520 [2020-10-27 23:57:09,322 INFO L226 Difference]: Without dead ends: 8182 [2020-10-27 23:57:09,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:57:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2020-10-27 23:57:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 4712. [2020-10-27 23:57:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4712 states. [2020-10-27 23:57:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4712 states to 4712 states and 6785 transitions. [2020-10-27 23:57:09,645 INFO L78 Accepts]: Start accepts. Automaton has 4712 states and 6785 transitions. Word has length 92 [2020-10-27 23:57:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:09,645 INFO L481 AbstractCegarLoop]: Abstraction has 4712 states and 6785 transitions. [2020-10-27 23:57:09,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:57:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4712 states and 6785 transitions. [2020-10-27 23:57:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 23:57:09,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:09,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:57:09,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:57:09,653 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 595078329, now seen corresponding path program 1 times [2020-10-27 23:57:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:09,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271888814] [2020-10-27 23:57:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:09,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:09,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:09,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:10,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:10,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:14,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:14,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 23:57:14,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 23:57:14,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:16,478 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:57:16,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:16,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:16,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:16,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:16,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271888814] [2020-10-27 23:57:16,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:16,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:57:16,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107823042] [2020-10-27 23:57:16,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:57:16,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:57:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:57:16,547 INFO L87 Difference]: Start difference. First operand 4712 states and 6785 transitions. Second operand 7 states. [2020-10-27 23:57:18,187 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:26,304 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-27 23:57:28,222 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:30,113 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:57:31,740 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:57:34,523 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:36,150 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 499 [2020-10-27 23:57:38,037 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 501 [2020-10-27 23:57:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:38,102 INFO L93 Difference]: Finished difference Result 10150 states and 14874 transitions. [2020-10-27 23:57:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:57:38,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 23:57:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:38,122 INFO L225 Difference]: With dead ends: 10150 [2020-10-27 23:57:38,122 INFO L226 Difference]: Without dead ends: 8726 [2020-10-27 23:57:38,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:57:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2020-10-27 23:57:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 5442. [2020-10-27 23:57:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5442 states. [2020-10-27 23:57:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5442 states to 5442 states and 7858 transitions. [2020-10-27 23:57:38,557 INFO L78 Accepts]: Start accepts. Automaton has 5442 states and 7858 transitions. Word has length 92 [2020-10-27 23:57:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:57:38,557 INFO L481 AbstractCegarLoop]: Abstraction has 5442 states and 7858 transitions. [2020-10-27 23:57:38,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:57:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5442 states and 7858 transitions. [2020-10-27 23:57:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 23:57:38,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:57:38,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:57:38,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:57:38,568 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:57:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:57:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash 716517515, now seen corresponding path program 1 times [2020-10-27 23:57:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:57:38,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743741333] [2020-10-27 23:57:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:57:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:38,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:39,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:43,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:43,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:43,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 23:57:43,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:57:43,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 23:57:43,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:57:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 23:57:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:57:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:45,490 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-27 23:57:45,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:57:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:57:45,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:57:45,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:57:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:57:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:57:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:57:45,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743741333] [2020-10-27 23:57:45,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:57:45,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:57:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192495319] [2020-10-27 23:57:45,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:57:45,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:57:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:57:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:57:45,591 INFO L87 Difference]: Start difference. First operand 5442 states and 7858 transitions. Second operand 9 states. [2020-10-27 23:57:47,212 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 500 [2020-10-27 23:57:54,911 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 498 [2020-10-27 23:57:58,417 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 497 [2020-10-27 23:57:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:57:58,893 INFO L93 Difference]: Finished difference Result 17428 states and 26088 transitions. [2020-10-27 23:57:58,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:57:58,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-10-27 23:57:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:57:58,926 INFO L225 Difference]: With dead ends: 17428 [2020-10-27 23:57:58,926 INFO L226 Difference]: Without dead ends: 14190 [2020-10-27 23:57:58,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:57:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states.