/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:12:56,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:12:56,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:12:56,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:12:56,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:12:56,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:12:56,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:12:56,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:12:56,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:12:56,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:12:56,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:12:56,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:12:56,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:12:56,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:12:56,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:12:56,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:12:56,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:12:56,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:12:56,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:12:56,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:12:56,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:12:56,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:12:56,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:12:56,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:12:56,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:12:56,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:12:56,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:12:56,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:12:56,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:12:56,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:12:56,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:12:56,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:12:56,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:12:56,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:12:56,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:12:56,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:12:56,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:12:56,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:12:56,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:12:56,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:12:56,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:12:56,883 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 [2020-08-22 03:12:56,929 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:12:56,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:12:56,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:12:56,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:12:56,932 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:12:56,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:12:56,933 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:12:56,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:12:56,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:12:56,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:12:56,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:12:56,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:12:56,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:12:56,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:12:56,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:12:56,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:12:56,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:12:56,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:12:56,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:12:56,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:12:56,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:12:56,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:12:56,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:12:56,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:12:56,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:12:56,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:12:56,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:12:56,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:12:56,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:12:56,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:12:57,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:12:57,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:12:57,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:12:57,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:12:57,250 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:12:57,251 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:57,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/724b698b7/18fd159a2c9a4a2b9e15029829d77565/FLAGca785287a [2020-08-22 03:12:57,924 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:12:57,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:12:57,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/724b698b7/18fd159a2c9a4a2b9e15029829d77565/FLAGca785287a [2020-08-22 03:12:58,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/724b698b7/18fd159a2c9a4a2b9e15029829d77565 [2020-08-22 03:12:58,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:12:58,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:12:58,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:58,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:12:58,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:12:58,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:58" (1/1) ... [2020-08-22 03:12:58,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b0f145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:58, skipping insertion in model container [2020-08-22 03:12:58,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:12:58" (1/1) ... [2020-08-22 03:12:58,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:12:58,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:12:59,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:59,370 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:12:59,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:12:59,933 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:12:59,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59 WrapperNode [2020-08-22 03:12:59,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:12:59,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:12:59,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:12:59,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:12:59,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:12:59,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (1/1) ... [2020-08-22 03:13:00,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:13:00,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:13:00,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:13:00,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:13:00,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (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 [2020-08-22 03:13:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:13:00,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:13:00,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 03:13:00,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:13:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:13:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 03:13:00,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-22 03:13:00,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 03:13:00,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 03:13:00,227 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-22 03:13:00,227 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-22 03:13:00,227 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-22 03:13:00,227 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-22 03:13:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-22 03:13:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-08-22 03:13:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 03:13:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 03:13:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:13:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:13:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:13:02,757 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:13:02,757 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:13:02,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:13:02 BoogieIcfgContainer [2020-08-22 03:13:02,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:13:02,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:13:02,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:13:02,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:13:02,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:12:58" (1/3) ... [2020-08-22 03:13:02,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399a392c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:13:02, skipping insertion in model container [2020-08-22 03:13:02,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:12:59" (2/3) ... [2020-08-22 03:13:02,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399a392c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:13:02, skipping insertion in model container [2020-08-22 03:13:02,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:13:02" (3/3) ... [2020-08-22 03:13:02,786 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-08-22 03:13:02,796 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:13:02,811 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:13:02,825 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:13:02,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:13:02,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:13:02,866 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:13:02,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:13:02,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:13:02,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:13:02,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:13:02,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:13:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-08-22 03:13:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 03:13:02,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:02,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:02,950 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-08-22 03:13:02,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:02,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148243933] [2020-08-22 03:13:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:04,838 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:04,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:05,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148243933] [2020-08-22 03:13:05,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:05,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:05,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139812717] [2020-08-22 03:13:05,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:05,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:05,082 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-08-22 03:13:05,550 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:10,447 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-08-22 03:13:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:10,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 03:13:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:10,477 INFO L225 Difference]: With dead ends: 1489 [2020-08-22 03:13:10,477 INFO L226 Difference]: Without dead ends: 1273 [2020-08-22 03:13:10,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-08-22 03:13:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-08-22 03:13:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-08-22 03:13:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-08-22 03:13:10,622 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-08-22 03:13:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:10,624 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-08-22 03:13:10,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-08-22 03:13:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 03:13:10,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:10,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:10,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:13:10,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-08-22 03:13:10,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:10,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162686128] [2020-08-22 03:13:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:11,406 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:11,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:11,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162686128] [2020-08-22 03:13:11,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:11,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:11,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586668620] [2020-08-22 03:13:11,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:11,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:11,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:11,616 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-08-22 03:13:12,032 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:16,415 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-08-22 03:13:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:16,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 03:13:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:16,430 INFO L225 Difference]: With dead ends: 2607 [2020-08-22 03:13:16,430 INFO L226 Difference]: Without dead ends: 2225 [2020-08-22 03:13:16,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-08-22 03:13:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-08-22 03:13:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-08-22 03:13:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-08-22 03:13:16,519 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-08-22 03:13:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:16,521 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-08-22 03:13:16,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-08-22 03:13:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 03:13:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:16,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:16,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:13:16,530 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-08-22 03:13:16,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:16,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392742158] [2020-08-22 03:13:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:17,417 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:17,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392742158] [2020-08-22 03:13:17,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:17,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:17,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469207804] [2020-08-22 03:13:17,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:17,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:17,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:17,767 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-08-22 03:13:18,189 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-08-22 03:13:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:22,385 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-08-22 03:13:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:22,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-08-22 03:13:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:22,413 INFO L225 Difference]: With dead ends: 4715 [2020-08-22 03:13:22,414 INFO L226 Difference]: Without dead ends: 4049 [2020-08-22 03:13:22,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-08-22 03:13:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-08-22 03:13:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-08-22 03:13:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-08-22 03:13:22,601 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-08-22 03:13:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:22,602 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-08-22 03:13:22,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-08-22 03:13:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 03:13:22,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:22,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:22,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:13:22,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-08-22 03:13:22,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:22,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544285466] [2020-08-22 03:13:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:23,826 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:23,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:24,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544285466] [2020-08-22 03:13:24,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:24,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:13:24,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764461055] [2020-08-22 03:13:24,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:13:24,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:13:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:13:24,189 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-08-22 03:13:31,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:31,420 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-08-22 03:13:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:13:31,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-08-22 03:13:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:31,459 INFO L225 Difference]: With dead ends: 11998 [2020-08-22 03:13:31,459 INFO L226 Difference]: Without dead ends: 7966 [2020-08-22 03:13:31,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:13:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-08-22 03:13:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-08-22 03:13:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-08-22 03:13:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-08-22 03:13:31,780 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-08-22 03:13:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:31,780 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-08-22 03:13:31,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:13:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-08-22 03:13:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 03:13:31,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:31,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:31,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:13:31,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-08-22 03:13:31,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:31,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993025312] [2020-08-22 03:13:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:32,534 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:32,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:32,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993025312] [2020-08-22 03:13:32,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:32,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:32,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117975583] [2020-08-22 03:13:32,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:32,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:32,748 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-08-22 03:13:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:40,644 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-08-22 03:13:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:13:40,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 03:13:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:40,709 INFO L225 Difference]: With dead ends: 23441 [2020-08-22 03:13:40,709 INFO L226 Difference]: Without dead ends: 15606 [2020-08-22 03:13:40,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-08-22 03:13:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-08-22 03:13:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-08-22 03:13:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-08-22 03:13:41,228 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-08-22 03:13:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:41,228 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-08-22 03:13:41,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-08-22 03:13:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-08-22 03:13:41,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:41,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:41,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:13:41,263 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-08-22 03:13:41,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:41,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048562303] [2020-08-22 03:13:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,736 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:41,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:41,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048562303] [2020-08-22 03:13:41,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:41,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:41,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854027317] [2020-08-22 03:13:41,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:41,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:41,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:41,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:41,937 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-08-22 03:13:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:13:50,125 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-08-22 03:13:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:13:50,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-08-22 03:13:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:13:50,197 INFO L225 Difference]: With dead ends: 46737 [2020-08-22 03:13:50,197 INFO L226 Difference]: Without dead ends: 31175 [2020-08-22 03:13:50,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-08-22 03:13:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-08-22 03:13:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-08-22 03:13:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-08-22 03:13:50,994 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-08-22 03:13:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:13:50,994 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-08-22 03:13:50,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:13:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-08-22 03:13:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 03:13:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:13:51,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:13:51,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:13:51,020 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:13:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:13:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-08-22 03:13:51,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:13:51,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230946015] [2020-08-22 03:13:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:13:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:51,518 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-08-22 03:13:51,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:13:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:13:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:13:51,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230946015] [2020-08-22 03:13:51,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:13:51,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 03:13:51,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058318630] [2020-08-22 03:13:51,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:13:51,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:13:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:13:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:13:51,766 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states.