/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:34:31,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:34:31,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:34:31,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:34:31,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:34:31,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:34:31,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:34:31,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:34:31,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:34:31,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:34:31,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:34:31,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:34:31,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:34:31,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:34:31,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:34:31,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:34:31,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:34:31,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:34:31,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:34:31,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:34:31,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:34:31,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:34:31,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:34:31,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:34:31,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:34:31,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:34:31,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:34:31,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:34:31,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:34:31,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:34:31,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:34:31,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:34:31,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:34:31,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:34:31,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:34:31,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:34:31,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:34:31,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:34:31,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:34:31,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:34:31,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:34:31,306 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 [2020-09-21 11:34:31,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:34:31,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:34:31,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:34:31,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:34:31,353 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:34:31,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:34:31,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:34:31,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:34:31,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:34:31,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:34:31,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:34:31,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:34:31,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:34:31,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:34:31,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:34:31,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:34:31,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:34:31,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:34:31,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:34:31,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:34:31,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:34:31,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:34:31,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:34:31,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:34:31,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:34:31,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:34:31,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:34:31,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:34:31,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:34:31,359 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:34:31,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:34:31,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:34:31,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:34:31,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:34:31,841 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:34:31,842 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 11:34:31,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8357f234/075097477b694b26b02bc226ad3f6626/FLAG78276a15b [2020-09-21 11:34:32,675 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:34:32,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 11:34:32,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8357f234/075097477b694b26b02bc226ad3f6626/FLAG78276a15b [2020-09-21 11:34:32,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8357f234/075097477b694b26b02bc226ad3f6626 [2020-09-21 11:34:32,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:34:32,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:34:32,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:32,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:34:32,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:34:32,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:32" (1/1) ... [2020-09-21 11:34:32,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:32, skipping insertion in model container [2020-09-21 11:34:32,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:32" (1/1) ... [2020-09-21 11:34:32,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:34:32,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:34:34,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:34,151 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:34:34,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:34,963 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:34:34,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34 WrapperNode [2020-09-21 11:34:34,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:34,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:34:34,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:34:34,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:34:34,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:34,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (1/1) ... [2020-09-21 11:34:35,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:34:35,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:34:35,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:34:35,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:34:35,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (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 [2020-09-21 11:34:35,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:34:35,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:34:35,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:34:35,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:34:35,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:34:35,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:34:35,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:34:35,281 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:34:35,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:34:35,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:34:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:34:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:34:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:34:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:34:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:34:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:34:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:34:35,285 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:34:35,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:34:35,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:34:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:34:38,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:34:38,076 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:34:38,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:38 BoogieIcfgContainer [2020-09-21 11:34:38,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:34:38,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:34:38,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:34:38,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:34:38,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:34:32" (1/3) ... [2020-09-21 11:34:38,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da07c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:38, skipping insertion in model container [2020-09-21 11:34:38,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:34" (2/3) ... [2020-09-21 11:34:38,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da07c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:38, skipping insertion in model container [2020-09-21 11:34:38,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:38" (3/3) ... [2020-09-21 11:34:38,099 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-09-21 11:34:38,111 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:34:38,122 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:34:38,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:34:38,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:34:38,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:34:38,182 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:34:38,182 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:34:38,182 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:34:38,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:34:38,183 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:34:38,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:34:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-09-21 11:34:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-09-21 11:34:38,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:38,260 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] [2020-09-21 11:34:38,261 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-09-21 11:34:38,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:38,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364192884] [2020-09-21 11:34:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:39,654 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:39,655 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:39,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:39,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-09-21 11:34:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 11:34:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:34:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:34:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 11:34:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:40,816 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 11:34:40,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:40,844 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:40,844 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:40,845 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:40,845 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:40,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:40,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:40,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:40,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:41,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364192884] [2020-09-21 11:34:41,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:41,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:34:41,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35158438] [2020-09-21 11:34:41,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:34:41,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:34:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:41,149 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-09-21 11:34:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:50,052 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-09-21 11:34:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:34:50,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-09-21 11:34:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:50,087 INFO L225 Difference]: With dead ends: 2333 [2020-09-21 11:34:50,088 INFO L226 Difference]: Without dead ends: 1545 [2020-09-21 11:34:50,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:34:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-21 11:34:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-09-21 11:34:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-21 11:34:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-09-21 11:34:50,285 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-09-21 11:34:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:50,288 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-09-21 11:34:50,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:34:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-09-21 11:34:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 11:34:50,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:50,306 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] [2020-09-21 11:34:50,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:34:50,307 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:50,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-09-21 11:34:50,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:50,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036734028] [2020-09-21 11:34:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:50,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:50,533 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:50,533 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:50,534 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:50,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 11:34:50,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:50,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:34:50,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:50,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:50,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:34:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-21 11:34:50,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:51,406 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 11:34:51,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:51,418 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:51,418 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:51,418 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:51,419 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:51,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:51,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:51,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:51,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:51,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:51,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:51,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:51,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036734028] [2020-09-21 11:34:51,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:51,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:51,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069362781] [2020-09-21 11:34:51,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:51,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:51,606 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-09-21 11:35:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:01,113 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-09-21 11:35:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:01,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 11:35:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:01,132 INFO L225 Difference]: With dead ends: 4438 [2020-09-21 11:35:01,132 INFO L226 Difference]: Without dead ends: 3024 [2020-09-21 11:35:01,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-09-21 11:35:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-09-21 11:35:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-21 11:35:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-09-21 11:35:01,267 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-09-21 11:35:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:01,270 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-09-21 11:35:01,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-09-21 11:35:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-21 11:35:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:01,280 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] [2020-09-21 11:35:01,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:35:01,281 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-09-21 11:35:01,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:01,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620569459] [2020-09-21 11:35:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:01,356 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:01,356 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:01,357 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:01,357 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:01,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-09-21 11:35:01,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:01,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:35:01,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:01,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:01,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:35:01,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:35:01,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:02,054 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 11:35:02,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:02,063 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:02,063 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:02,063 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:02,064 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:02,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:02,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:02,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:02,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:02,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620569459] [2020-09-21 11:35:02,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:02,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:02,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064544383] [2020-09-21 11:35:02,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:02,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:02,163 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-09-21 11:35:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:11,161 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-09-21 11:35:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:11,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-09-21 11:35:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:11,195 INFO L225 Difference]: With dead ends: 8991 [2020-09-21 11:35:11,195 INFO L226 Difference]: Without dead ends: 6011 [2020-09-21 11:35:11,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-09-21 11:35:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-09-21 11:35:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-09-21 11:35:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-09-21 11:35:11,355 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-09-21 11:35:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:11,355 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-09-21 11:35:11,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-09-21 11:35:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-09-21 11:35:11,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:11,368 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] [2020-09-21 11:35:11,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:35:11,368 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-09-21 11:35:11,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:11,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110342710] [2020-09-21 11:35:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:11,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:11,463 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:11,463 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:11,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:11,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-09-21 11:35:11,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:11,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:35:11,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:11,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 11:35:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:35:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:12,088 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 11:35:12,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:12,097 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:12,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:12,098 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:12,098 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:12,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:12,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:12,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:12,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:12,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110342710] [2020-09-21 11:35:12,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:12,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:12,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879515243] [2020-09-21 11:35:12,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:12,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:12,256 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-09-21 11:35:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:21,118 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-09-21 11:35:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:21,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-09-21 11:35:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:21,144 INFO L225 Difference]: With dead ends: 9010 [2020-09-21 11:35:21,144 INFO L226 Difference]: Without dead ends: 6029 [2020-09-21 11:35:21,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-09-21 11:35:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-09-21 11:35:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-09-21 11:35:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-09-21 11:35:21,296 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-09-21 11:35:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:21,296 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-09-21 11:35:21,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-09-21 11:35:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 11:35:21,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:21,305 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] [2020-09-21 11:35:21,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:35:21,306 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-09-21 11:35:21,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:21,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423985546] [2020-09-21 11:35:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:21,488 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:21,488 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:21,488 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:21,489 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:21,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-09-21 11:35:21,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:35:21,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:35:21,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-09-21 11:35:21,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:22,229 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-09-21 11:35:22,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:22,241 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:22,242 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:22,242 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:22,242 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:22,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:22,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:22,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:22,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:22,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423985546] [2020-09-21 11:35:22,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:22,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115821496] [2020-09-21 11:35:22,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:22,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:22,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:22,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:22,371 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-09-21 11:35:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:31,029 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-09-21 11:35:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:31,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-09-21 11:35:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:31,055 INFO L225 Difference]: With dead ends: 8718 [2020-09-21 11:35:31,056 INFO L226 Difference]: Without dead ends: 5904 [2020-09-21 11:35:31,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-09-21 11:35:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-09-21 11:35:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-09-21 11:35:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-09-21 11:35:31,318 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-09-21 11:35:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:31,321 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-09-21 11:35:31,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-09-21 11:35:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-09-21 11:35:31,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:31,335 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] [2020-09-21 11:35:31,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:35:31,335 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:31,336 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-09-21 11:35:31,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:31,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989204625] [2020-09-21 11:35:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY