/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:19:21,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:19:21,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:19:21,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:19:21,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:19:21,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:19:21,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:19:21,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:19:21,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:19:21,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:19:21,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:19:21,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:19:21,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:19:21,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:19:21,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:19:21,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:19:21,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:19:21,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:19:21,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:19:21,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:19:21,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:19:21,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:19:21,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:19:21,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:19:21,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:19:21,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:19:21,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:19:21,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:19:21,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:19:21,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:19:21,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:19:21,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:19:21,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:19:21,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:19:21,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:19:21,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:19:21,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:19:21,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:19:21,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:19:21,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:19:21,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:19:21,184 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 [2020-08-19 01:19:21,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:19:21,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:19:21,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:19:21,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:19:21,240 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:19:21,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:19:21,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:19:21,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:19:21,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:19:21,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:19:21,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:19:21,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:19:21,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:19:21,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:19:21,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:19:21,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:19:21,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:19:21,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:19:21,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:19:21,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:19:21,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:19:21,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:19:21,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:19:21,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:19:21,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:19:21,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:19:21,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:19:21,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:19:21,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:19:21,249 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:19:21,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:19:21,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:19:21,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:19:21,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:19:21,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:19:21,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 01:19:21,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ca906a5f/482bac052515438a81a634403f814901/FLAG149416540 [2020-08-19 01:19:22,352 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:19:22,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 01:19:22,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ca906a5f/482bac052515438a81a634403f814901/FLAG149416540 [2020-08-19 01:19:22,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ca906a5f/482bac052515438a81a634403f814901 [2020-08-19 01:19:22,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:19:22,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:19:22,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:19:22,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:19:22,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:19:22,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:19:22" (1/1) ... [2020-08-19 01:19:22,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d5df5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:22, skipping insertion in model container [2020-08-19 01:19:22,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:19:22" (1/1) ... [2020-08-19 01:19:22,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:19:22,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:19:23,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:19:23,309 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:19:23,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:19:23,862 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:19:23,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23 WrapperNode [2020-08-19 01:19:23,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:19:23,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:19:23,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:19:23,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:19:23,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (1/1) ... [2020-08-19 01:19:23,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:19:23,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:19:23,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:19:23,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:19:23,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (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 [2020-08-19 01:19:24,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:19:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:19:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 01:19:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:19:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:19:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 01:19:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 01:19:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-08-19 01:19:24,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 01:19:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 01:19:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-08-19 01:19:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-08-19 01:19:24,097 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-08-19 01:19:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-08-19 01:19:24,098 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-08-19 01:19:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-19 01:19:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-19 01:19:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:19:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:19:24,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:19:25,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:19:25,909 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 01:19:25,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:19:25 BoogieIcfgContainer [2020-08-19 01:19:25,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:19:25,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:19:25,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:19:25,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:19:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:19:22" (1/3) ... [2020-08-19 01:19:25,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458f832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:19:25, skipping insertion in model container [2020-08-19 01:19:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:19:23" (2/3) ... [2020-08-19 01:19:25,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5458f832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:19:25, skipping insertion in model container [2020-08-19 01:19:25,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:19:25" (3/3) ... [2020-08-19 01:19:25,929 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-08-19 01:19:25,940 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:19:25,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-08-19 01:19:25,961 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-08-19 01:19:25,989 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:19:25,989 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:19:25,989 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:19:25,989 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:19:25,989 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:19:25,989 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:19:25,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:19:25,990 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:19:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-08-19 01:19:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 01:19:26,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:26,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:19:26,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 604537660, now seen corresponding path program 1 times [2020-08-19 01:19:26,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:26,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576315599] [2020-08-19 01:19:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:27,030 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:27,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576315599] [2020-08-19 01:19:27,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:27,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:27,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333876529] [2020-08-19 01:19:27,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:27,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:27,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:27,122 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 4 states. [2020-08-19 01:19:27,470 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 01:19:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:30,254 INFO L93 Difference]: Finished difference Result 754 states and 1320 transitions. [2020-08-19 01:19:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:19:30,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 01:19:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:30,279 INFO L225 Difference]: With dead ends: 754 [2020-08-19 01:19:30,279 INFO L226 Difference]: Without dead ends: 593 [2020-08-19 01:19:30,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-08-19 01:19:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2020-08-19 01:19:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-19 01:19:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 870 transitions. [2020-08-19 01:19:30,378 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 870 transitions. Word has length 146 [2020-08-19 01:19:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:30,380 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 870 transitions. [2020-08-19 01:19:30,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 870 transitions. [2020-08-19 01:19:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 01:19:30,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:30,386 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] [2020-08-19 01:19:30,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:19:30,387 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 694944860, now seen corresponding path program 1 times [2020-08-19 01:19:30,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:30,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913602149] [2020-08-19 01:19:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:30,806 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:30,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:30,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913602149] [2020-08-19 01:19:30,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:30,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:30,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818054318] [2020-08-19 01:19:30,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:30,894 INFO L87 Difference]: Start difference. First operand 591 states and 870 transitions. Second operand 4 states. [2020-08-19 01:19:31,162 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 01:19:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:33,371 INFO L93 Difference]: Finished difference Result 1190 states and 1805 transitions. [2020-08-19 01:19:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:19:33,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 01:19:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:33,385 INFO L225 Difference]: With dead ends: 1190 [2020-08-19 01:19:33,385 INFO L226 Difference]: Without dead ends: 961 [2020-08-19 01:19:33,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-08-19 01:19:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-08-19 01:19:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-08-19 01:19:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1434 transitions. [2020-08-19 01:19:33,516 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1434 transitions. Word has length 146 [2020-08-19 01:19:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:33,517 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1434 transitions. [2020-08-19 01:19:33,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1434 transitions. [2020-08-19 01:19:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 01:19:33,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:33,523 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] [2020-08-19 01:19:33,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:19:33,524 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:33,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1369993092, now seen corresponding path program 1 times [2020-08-19 01:19:33,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:33,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389569707] [2020-08-19 01:19:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:33,908 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:33,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:33,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389569707] [2020-08-19 01:19:33,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:33,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:33,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651630716] [2020-08-19 01:19:33,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:33,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:33,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:33,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:33,975 INFO L87 Difference]: Start difference. First operand 959 states and 1434 transitions. Second operand 4 states. [2020-08-19 01:19:34,229 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-08-19 01:19:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:36,456 INFO L93 Difference]: Finished difference Result 2090 states and 3210 transitions. [2020-08-19 01:19:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:19:36,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-08-19 01:19:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:36,470 INFO L225 Difference]: With dead ends: 2090 [2020-08-19 01:19:36,470 INFO L226 Difference]: Without dead ends: 1701 [2020-08-19 01:19:36,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2020-08-19 01:19:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2020-08-19 01:19:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-08-19 01:19:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2566 transitions. [2020-08-19 01:19:36,542 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2566 transitions. Word has length 146 [2020-08-19 01:19:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:36,543 INFO L479 AbstractCegarLoop]: Abstraction has 1699 states and 2566 transitions. [2020-08-19 01:19:36,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2566 transitions. [2020-08-19 01:19:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-19 01:19:36,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:36,548 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] [2020-08-19 01:19:36,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:19:36,550 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:36,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:36,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1370331716, now seen corresponding path program 1 times [2020-08-19 01:19:36,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:36,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619576693] [2020-08-19 01:19:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:37,138 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:37,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619576693] [2020-08-19 01:19:37,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:37,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:19:37,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819289446] [2020-08-19 01:19:37,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:19:37,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:19:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:37,193 INFO L87 Difference]: Start difference. First operand 1699 states and 2566 transitions. Second operand 5 states. [2020-08-19 01:19:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:40,881 INFO L93 Difference]: Finished difference Result 4967 states and 7485 transitions. [2020-08-19 01:19:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:19:40,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-19 01:19:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:40,898 INFO L225 Difference]: With dead ends: 4967 [2020-08-19 01:19:40,899 INFO L226 Difference]: Without dead ends: 3281 [2020-08-19 01:19:40,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:19:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-08-19 01:19:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3235. [2020-08-19 01:19:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-08-19 01:19:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4851 transitions. [2020-08-19 01:19:41,031 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4851 transitions. Word has length 146 [2020-08-19 01:19:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:41,031 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 4851 transitions. [2020-08-19 01:19:41,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:19:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4851 transitions. [2020-08-19 01:19:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-19 01:19:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:41,037 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] [2020-08-19 01:19:41,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:19:41,037 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1648495204, now seen corresponding path program 1 times [2020-08-19 01:19:41,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:41,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150077954] [2020-08-19 01:19:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:41,403 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:41,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:41,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150077954] [2020-08-19 01:19:41,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:41,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:41,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460524949] [2020-08-19 01:19:41,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:41,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:41,474 INFO L87 Difference]: Start difference. First operand 3235 states and 4851 transitions. Second operand 4 states. [2020-08-19 01:19:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:44,306 INFO L93 Difference]: Finished difference Result 9659 states and 14483 transitions. [2020-08-19 01:19:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:19:44,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-08-19 01:19:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:44,336 INFO L225 Difference]: With dead ends: 9659 [2020-08-19 01:19:44,336 INFO L226 Difference]: Without dead ends: 6456 [2020-08-19 01:19:44,344 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 [2020-08-19 01:19:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2020-08-19 01:19:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 3237. [2020-08-19 01:19:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-08-19 01:19:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4853 transitions. [2020-08-19 01:19:44,535 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4853 transitions. Word has length 147 [2020-08-19 01:19:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:44,535 INFO L479 AbstractCegarLoop]: Abstraction has 3237 states and 4853 transitions. [2020-08-19 01:19:44,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4853 transitions. [2020-08-19 01:19:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-19 01:19:44,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:44,541 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] [2020-08-19 01:19:44,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:19:44,541 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash 921116989, now seen corresponding path program 1 times [2020-08-19 01:19:44,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:44,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858812731] [2020-08-19 01:19:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:45,087 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:45,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858812731] [2020-08-19 01:19:45,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:45,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:19:45,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328577085] [2020-08-19 01:19:45,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:19:45,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:19:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:45,171 INFO L87 Difference]: Start difference. First operand 3237 states and 4853 transitions. Second operand 5 states. [2020-08-19 01:19:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:48,650 INFO L93 Difference]: Finished difference Result 9441 states and 14115 transitions. [2020-08-19 01:19:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:19:48,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-08-19 01:19:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:48,677 INFO L225 Difference]: With dead ends: 9441 [2020-08-19 01:19:48,677 INFO L226 Difference]: Without dead ends: 6238 [2020-08-19 01:19:48,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:19:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2020-08-19 01:19:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 6192. [2020-08-19 01:19:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6192 states. [2020-08-19 01:19:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9193 transitions. [2020-08-19 01:19:48,976 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9193 transitions. Word has length 148 [2020-08-19 01:19:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:48,976 INFO L479 AbstractCegarLoop]: Abstraction has 6192 states and 9193 transitions. [2020-08-19 01:19:48,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:19:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9193 transitions. [2020-08-19 01:19:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-19 01:19:48,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:48,994 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] [2020-08-19 01:19:48,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:19:48,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash 239618117, now seen corresponding path program 1 times [2020-08-19 01:19:48,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:48,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460177859] [2020-08-19 01:19:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:49,288 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:49,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460177859] [2020-08-19 01:19:49,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:49,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:49,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910367888] [2020-08-19 01:19:49,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:49,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:49,328 INFO L87 Difference]: Start difference. First operand 6192 states and 9193 transitions. Second operand 4 states. [2020-08-19 01:19:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:52,841 INFO L93 Difference]: Finished difference Result 18492 states and 27451 transitions. [2020-08-19 01:19:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:19:52,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-08-19 01:19:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:52,884 INFO L225 Difference]: With dead ends: 18492 [2020-08-19 01:19:52,884 INFO L226 Difference]: Without dead ends: 12348 [2020-08-19 01:19:52,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-08-19 01:19:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 6196. [2020-08-19 01:19:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6196 states. [2020-08-19 01:19:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 9197 transitions. [2020-08-19 01:19:53,210 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 9197 transitions. Word has length 149 [2020-08-19 01:19:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:53,211 INFO L479 AbstractCegarLoop]: Abstraction has 6196 states and 9197 transitions. [2020-08-19 01:19:53,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 9197 transitions. [2020-08-19 01:19:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 01:19:53,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:53,222 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] [2020-08-19 01:19:53,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:19:53,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:53,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1772203169, now seen corresponding path program 1 times [2020-08-19 01:19:53,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:53,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354714382] [2020-08-19 01:19:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:53,522 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:53,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:53,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354714382] [2020-08-19 01:19:53,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:53,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:19:53,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458337398] [2020-08-19 01:19:53,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:19:53,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:53,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:19:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:53,584 INFO L87 Difference]: Start difference. First operand 6196 states and 9197 transitions. Second operand 4 states. [2020-08-19 01:19:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:19:56,879 INFO L93 Difference]: Finished difference Result 16495 states and 24448 transitions. [2020-08-19 01:19:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:19:56,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-08-19 01:19:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:19:56,913 INFO L225 Difference]: With dead ends: 16495 [2020-08-19 01:19:56,913 INFO L226 Difference]: Without dead ends: 10615 [2020-08-19 01:19:56,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:19:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2020-08-19 01:19:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10569. [2020-08-19 01:19:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 01:19:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15484 transitions. [2020-08-19 01:19:57,391 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15484 transitions. Word has length 150 [2020-08-19 01:19:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:19:57,391 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15484 transitions. [2020-08-19 01:19:57,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:19:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15484 transitions. [2020-08-19 01:19:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 01:19:57,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:19:57,407 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] [2020-08-19 01:19:57,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:19:57,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:19:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:19:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 251552574, now seen corresponding path program 1 times [2020-08-19 01:19:57,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:19:57,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046553799] [2020-08-19 01:19:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:19:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:57,739 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:19:57,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:19:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:19:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:19:57,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046553799] [2020-08-19 01:19:57,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:19:57,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:19:57,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620473820] [2020-08-19 01:19:57,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:19:57,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:19:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:19:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:19:57,780 INFO L87 Difference]: Start difference. First operand 10569 states and 15484 transitions. Second operand 5 states. [2020-08-19 01:20:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:20:00,245 INFO L93 Difference]: Finished difference Result 21564 states and 31467 transitions. [2020-08-19 01:20:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:20:00,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 01:20:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:20:00,269 INFO L225 Difference]: With dead ends: 21564 [2020-08-19 01:20:00,270 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 01:20:00,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:20:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 01:20:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10805. [2020-08-19 01:20:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10805 states. [2020-08-19 01:20:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 15660 transitions. [2020-08-19 01:20:00,867 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 15660 transitions. Word has length 150 [2020-08-19 01:20:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:20:00,868 INFO L479 AbstractCegarLoop]: Abstraction has 10805 states and 15660 transitions. [2020-08-19 01:20:00,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:20:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 15660 transitions. [2020-08-19 01:20:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-19 01:20:00,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:20:00,881 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] [2020-08-19 01:20:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:20:00,881 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:20:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:20:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1535594178, now seen corresponding path program 1 times [2020-08-19 01:20:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:20:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380773384] [2020-08-19 01:20:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:20:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:01,288 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:20:01,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:20:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:20:01,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380773384] [2020-08-19 01:20:01,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:20:01,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:20:01,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966830516] [2020-08-19 01:20:01,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:20:01,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:20:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:20:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:20:01,346 INFO L87 Difference]: Start difference. First operand 10805 states and 15660 transitions. Second operand 5 states. [2020-08-19 01:20:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:20:04,746 INFO L93 Difference]: Finished difference Result 15230 states and 22013 transitions. [2020-08-19 01:20:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:20:04,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-08-19 01:20:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:20:04,767 INFO L225 Difference]: With dead ends: 15230 [2020-08-19 01:20:04,768 INFO L226 Difference]: Without dead ends: 10851 [2020-08-19 01:20:04,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:20:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2020-08-19 01:20:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10569. [2020-08-19 01:20:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10569 states. [2020-08-19 01:20:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 15362 transitions. [2020-08-19 01:20:05,338 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 15362 transitions. Word has length 150 [2020-08-19 01:20:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:20:05,338 INFO L479 AbstractCegarLoop]: Abstraction has 10569 states and 15362 transitions. [2020-08-19 01:20:05,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:20:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 15362 transitions. [2020-08-19 01:20:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-19 01:20:05,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:20:05,351 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] [2020-08-19 01:20:05,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:20:05,351 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:20:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:20:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1232731994, now seen corresponding path program 1 times [2020-08-19 01:20:05,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:20:05,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344807937] [2020-08-19 01:20:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:20:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:05,729 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:20:05,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:20:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:20:05,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344807937] [2020-08-19 01:20:05,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:20:05,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:20:05,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177958915] [2020-08-19 01:20:05,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:20:05,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:20:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:20:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:20:05,792 INFO L87 Difference]: Start difference. First operand 10569 states and 15362 transitions. Second operand 4 states. [2020-08-19 01:20:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:20:09,750 INFO L93 Difference]: Finished difference Result 25409 states and 36872 transitions. [2020-08-19 01:20:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:20:09,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-08-19 01:20:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:20:09,777 INFO L225 Difference]: With dead ends: 25409 [2020-08-19 01:20:09,778 INFO L226 Difference]: Without dead ends: 21030 [2020-08-19 01:20:09,790 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 [2020-08-19 01:20:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-08-19 01:20:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 10577. [2020-08-19 01:20:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10577 states. [2020-08-19 01:20:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 15370 transitions. [2020-08-19 01:20:11,012 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 15370 transitions. Word has length 151 [2020-08-19 01:20:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:20:11,012 INFO L479 AbstractCegarLoop]: Abstraction has 10577 states and 15370 transitions. [2020-08-19 01:20:11,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:20:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 15370 transitions. [2020-08-19 01:20:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 01:20:11,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:20:11,023 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] [2020-08-19 01:20:11,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:20:11,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:20:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:20:11,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1234425885, now seen corresponding path program 1 times [2020-08-19 01:20:11,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:20:11,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756176595] [2020-08-19 01:20:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:20:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:11,356 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:20:11,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:20:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:20:11,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756176595] [2020-08-19 01:20:11,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:20:11,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:20:11,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692834827] [2020-08-19 01:20:11,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:20:11,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:20:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:20:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:20:11,412 INFO L87 Difference]: Start difference. First operand 10577 states and 15370 transitions. Second operand 5 states. [2020-08-19 01:20:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:20:14,587 INFO L93 Difference]: Finished difference Result 30843 states and 44647 transitions. [2020-08-19 01:20:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:20:14,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-19 01:20:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:20:14,615 INFO L225 Difference]: With dead ends: 30843 [2020-08-19 01:20:14,615 INFO L226 Difference]: Without dead ends: 20313 [2020-08-19 01:20:14,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:20:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2020-08-19 01:20:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20283. [2020-08-19 01:20:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20283 states. [2020-08-19 01:20:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 29041 transitions. [2020-08-19 01:20:15,522 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 29041 transitions. Word has length 152 [2020-08-19 01:20:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:20:15,523 INFO L479 AbstractCegarLoop]: Abstraction has 20283 states and 29041 transitions. [2020-08-19 01:20:15,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:20:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 29041 transitions. [2020-08-19 01:20:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-19 01:20:15,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:20:15,537 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] [2020-08-19 01:20:15,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:20:15,537 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:20:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:20:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash -695536157, now seen corresponding path program 1 times [2020-08-19 01:20:15,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:20:15,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807297605] [2020-08-19 01:20:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:20:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:15,868 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-08-19 01:20:15,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:20:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:20:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:20:15,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807297605] [2020-08-19 01:20:15,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:20:15,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:20:15,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478342155] [2020-08-19 01:20:15,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:20:15,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:20:15,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:20:15,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:20:15,932 INFO L87 Difference]: Start difference. First operand 20283 states and 29041 transitions. Second operand 5 states.