/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.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 00:05:22,112 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 00:05:22,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 00:05:22,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 00:05:22,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 00:05:22,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 00:05:22,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 00:05:22,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 00:05:22,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 00:05:22,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 00:05:22,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 00:05:22,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 00:05:22,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 00:05:22,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 00:05:22,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 00:05:22,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 00:05:22,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 00:05:22,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 00:05:22,182 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 00:05:22,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 00:05:22,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 00:05:22,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 00:05:22,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 00:05:22,225 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 00:05:22,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 00:05:22,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 00:05:22,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 00:05:22,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 00:05:22,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 00:05:22,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 00:05:22,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 00:05:22,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 00:05:22,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 00:05:22,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 00:05:22,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 00:05:22,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 00:05:22,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 00:05:22,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 00:05:22,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 00:05:22,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 00:05:22,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 00:05:22,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 00:05:22,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 00:05:22,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 00:05:22,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 00:05:22,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 00:05:22,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 00:05:22,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 00:05:22,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 00:05:22,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 00:05:22,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 00:05:22,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 00:05:22,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 00:05:22,535 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 00:05:22,537 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 00:05:22,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97c8a3b6/ab89ba94db3942128d48863dfe3f196d/FLAG303f612fb [2020-07-20 00:05:23,266 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 00:05:23,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 00:05:23,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97c8a3b6/ab89ba94db3942128d48863dfe3f196d/FLAG303f612fb [2020-07-20 00:05:23,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97c8a3b6/ab89ba94db3942128d48863dfe3f196d [2020-07-20 00:05:23,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 00:05:23,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 00:05:23,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 00:05:23,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 00:05:23,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 00:05:23,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:05:23" (1/1) ... [2020-07-20 00:05:23,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fba6241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:23, skipping insertion in model container [2020-07-20 00:05:23,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:05:23" (1/1) ... [2020-07-20 00:05:23,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 00:05:23,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 00:05:24,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:05:24,541 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 00:05:25,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:05:25,097 INFO L208 MainTranslator]: Completed translation [2020-07-20 00:05:25,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25 WrapperNode [2020-07-20 00:05:25,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 00:05:25,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 00:05:25,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 00:05:25,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 00:05:25,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... [2020-07-20 00:05:25,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 00:05:25,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 00:05:25,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 00:05:25,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 00:05:25,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 00:05:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 00:05:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 00:05:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 00:05:25,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 00:05:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 00:05:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 00:05:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 00:05:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 00:05:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 00:05:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 00:05:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 00:05:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 00:05:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 00:05:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 00:05:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 00:05:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 00:05:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 00:05:25,374 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 00:05:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 00:05:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 00:05:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 00:05:27,945 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 00:05:27,946 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 00:05:27,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:05:27 BoogieIcfgContainer [2020-07-20 00:05:27,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 00:05:27,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 00:05:27,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 00:05:27,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 00:05:27,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:05:23" (1/3) ... [2020-07-20 00:05:27,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cc5e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:05:27, skipping insertion in model container [2020-07-20 00:05:27,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:05:25" (2/3) ... [2020-07-20 00:05:27,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cc5e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:05:27, skipping insertion in model container [2020-07-20 00:05:27,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:05:27" (3/3) ... [2020-07-20 00:05:27,965 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 00:05:27,976 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 00:05:27,985 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 00:05:28,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 00:05:28,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 00:05:28,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 00:05:28,028 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 00:05:28,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 00:05:28,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 00:05:28,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 00:05:28,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 00:05:28,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 00:05:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 00:05:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 00:05:28,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:28,099 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] [2020-07-20 00:05:28,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 00:05:28,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:28,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181268706] [2020-07-20 00:05:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:05:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:30,395 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:05:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:05:30,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181268706] [2020-07-20 00:05:30,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:05:30,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:05:30,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517371061] [2020-07-20 00:05:30,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:05:30,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:05:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:05:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:05:30,799 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-07-20 00:05:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:39,196 INFO L93 Difference]: Finished difference Result 2333 states and 4147 transitions. [2020-07-20 00:05:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 00:05:39,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-07-20 00:05:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:39,230 INFO L225 Difference]: With dead ends: 2333 [2020-07-20 00:05:39,230 INFO L226 Difference]: Without dead ends: 1545 [2020-07-20 00:05:39,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:05:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-20 00:05:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543. [2020-07-20 00:05:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-07-20 00:05:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions. [2020-07-20 00:05:39,435 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324 [2020-07-20 00:05:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:05:39,437 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions. [2020-07-20 00:05:39,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:05:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions. [2020-07-20 00:05:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 00:05:39,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:39,449 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] [2020-07-20 00:05:39,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 00:05:39,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times [2020-07-20 00:05:39,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:39,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025643343] [2020-07-20 00:05:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:05:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:40,328 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:05:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:05:40,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025643343] [2020-07-20 00:05:40,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:05:40,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:05:40,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561356282] [2020-07-20 00:05:40,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:05:40,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:05:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:05:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:05:40,623 INFO L87 Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states. [2020-07-20 00:05:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:49,863 INFO L93 Difference]: Finished difference Result 4438 states and 6875 transitions. [2020-07-20 00:05:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:05:49,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 00:05:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:49,881 INFO L225 Difference]: With dead ends: 4438 [2020-07-20 00:05:49,881 INFO L226 Difference]: Without dead ends: 3024 [2020-07-20 00:05:49,886 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 [2020-07-20 00:05:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2020-07-20 00:05:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022. [2020-07-20 00:05:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-07-20 00:05:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions. [2020-07-20 00:05:50,021 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326 [2020-07-20 00:05:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:05:50,024 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions. [2020-07-20 00:05:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:05:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions. [2020-07-20 00:05:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 00:05:50,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:50,039 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] [2020-07-20 00:05:50,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 00:05:50,039 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times [2020-07-20 00:05:50,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:50,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30924532] [2020-07-20 00:05:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:05:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:50,616 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:05:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:05:50,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30924532] [2020-07-20 00:05:50,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:05:50,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:05:50,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160246041] [2020-07-20 00:05:50,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:05:50,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:05:50,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:05:50,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:05:50,759 INFO L87 Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states. [2020-07-20 00:05:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:59,236 INFO L93 Difference]: Finished difference Result 8991 states and 13913 transitions. [2020-07-20 00:05:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:05:59,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 00:05:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:59,268 INFO L225 Difference]: With dead ends: 8991 [2020-07-20 00:05:59,268 INFO L226 Difference]: Without dead ends: 6011 [2020-07-20 00:05:59,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:05:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2020-07-20 00:05:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041. [2020-07-20 00:05:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3041 states. [2020-07-20 00:05:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions. [2020-07-20 00:05:59,434 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326 [2020-07-20 00:05:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:05:59,434 INFO L479 AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions. [2020-07-20 00:05:59,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:05:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions. [2020-07-20 00:05:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 00:05:59,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:59,445 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] [2020-07-20 00:05:59,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 00:05:59,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times [2020-07-20 00:05:59,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:59,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750745774] [2020-07-20 00:05:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:05:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:00,003 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:00,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750745774] [2020-07-20 00:06:00,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:00,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:06:00,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712404676] [2020-07-20 00:06:00,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:06:00,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:06:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:00,172 INFO L87 Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states. [2020-07-20 00:06:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:08,274 INFO L93 Difference]: Finished difference Result 9010 states and 13934 transitions. [2020-07-20 00:06:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:06:08,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-20 00:06:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:08,301 INFO L225 Difference]: With dead ends: 9010 [2020-07-20 00:06:08,302 INFO L226 Difference]: Without dead ends: 6029 [2020-07-20 00:06:08,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2020-07-20 00:06:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059. [2020-07-20 00:06:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3059 states. [2020-07-20 00:06:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions. [2020-07-20 00:06:08,467 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327 [2020-07-20 00:06:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:08,468 INFO L479 AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions. [2020-07-20 00:06:08,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:06:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions. [2020-07-20 00:06:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 00:06:08,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:08,482 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] [2020-07-20 00:06:08,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 00:06:08,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:08,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times [2020-07-20 00:06:08,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:08,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484477008] [2020-07-20 00:06:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:09,175 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:09,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484477008] [2020-07-20 00:06:09,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:09,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:06:09,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025952194] [2020-07-20 00:06:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:06:09,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:09,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:06:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:09,353 INFO L87 Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states. [2020-07-20 00:06:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:17,279 INFO L93 Difference]: Finished difference Result 8718 states and 13409 transitions. [2020-07-20 00:06:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:06:17,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 00:06:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:17,302 INFO L225 Difference]: With dead ends: 8718 [2020-07-20 00:06:17,302 INFO L226 Difference]: Without dead ends: 5904 [2020-07-20 00:06:17,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2020-07-20 00:06:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902. [2020-07-20 00:06:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5902 states. [2020-07-20 00:06:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions. [2020-07-20 00:06:17,613 INFO L78 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328 [2020-07-20 00:06:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:17,614 INFO L479 AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions. [2020-07-20 00:06:17,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:06:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions. [2020-07-20 00:06:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 00:06:17,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:17,630 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] [2020-07-20 00:06:17,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 00:06:17,630 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times [2020-07-20 00:06:17,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:17,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804225076] [2020-07-20 00:06:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:18,561 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:18,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804225076] [2020-07-20 00:06:18,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:18,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:06:18,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056284004] [2020-07-20 00:06:18,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:06:18,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:06:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:06:18,701 INFO L87 Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states. [2020-07-20 00:06:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:24,734 INFO L93 Difference]: Finished difference Result 13189 states and 20201 transitions. [2020-07-20 00:06:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:06:24,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-07-20 00:06:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:24,767 INFO L225 Difference]: With dead ends: 13189 [2020-07-20 00:06:24,767 INFO L226 Difference]: Without dead ends: 6775 [2020-07-20 00:06:24,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:06:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-07-20 00:06:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773. [2020-07-20 00:06:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6773 states. [2020-07-20 00:06:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions. [2020-07-20 00:06:25,093 INFO L78 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328 [2020-07-20 00:06:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:25,093 INFO L479 AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions. [2020-07-20 00:06:25,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:06:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions. [2020-07-20 00:06:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 00:06:25,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:25,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:06:25,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 00:06:25,112 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times [2020-07-20 00:06:25,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:25,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826620124] [2020-07-20 00:06:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:25,669 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:25,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826620124] [2020-07-20 00:06:25,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:25,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:06:25,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448223800] [2020-07-20 00:06:25,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:06:25,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:06:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:25,784 INFO L87 Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states. [2020-07-20 00:06:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:30,858 INFO L93 Difference]: Finished difference Result 19447 states and 29573 transitions. [2020-07-20 00:06:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:06:30,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 00:06:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:30,901 INFO L225 Difference]: With dead ends: 19447 [2020-07-20 00:06:30,902 INFO L226 Difference]: Without dead ends: 13127 [2020-07-20 00:06:30,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-07-20 00:06:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 6831. [2020-07-20 00:06:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6831 states. [2020-07-20 00:06:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6831 states to 6831 states and 10425 transitions. [2020-07-20 00:06:31,364 INFO L78 Accepts]: Start accepts. Automaton has 6831 states and 10425 transitions. Word has length 330 [2020-07-20 00:06:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:31,365 INFO L479 AbstractCegarLoop]: Abstraction has 6831 states and 10425 transitions. [2020-07-20 00:06:31,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:06:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6831 states and 10425 transitions. [2020-07-20 00:06:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 00:06:31,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:31,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:06:31,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 00:06:31,381 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1432284472, now seen corresponding path program 1 times [2020-07-20 00:06:31,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:31,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091575294] [2020-07-20 00:06:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:32,139 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:32,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091575294] [2020-07-20 00:06:32,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:32,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:06:32,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338549139] [2020-07-20 00:06:32,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:06:32,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:32,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:06:32,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:06:32,297 INFO L87 Difference]: Start difference. First operand 6831 states and 10425 transitions. Second operand 4 states. [2020-07-20 00:06:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:40,827 INFO L93 Difference]: Finished difference Result 19896 states and 30288 transitions. [2020-07-20 00:06:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:06:40,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 00:06:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:40,850 INFO L225 Difference]: With dead ends: 19896 [2020-07-20 00:06:40,850 INFO L226 Difference]: Without dead ends: 13350 [2020-07-20 00:06:40,862 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 [2020-07-20 00:06:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-07-20 00:06:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 13348. [2020-07-20 00:06:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13348 states. [2020-07-20 00:06:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13348 states to 13348 states and 20240 transitions. [2020-07-20 00:06:41,371 INFO L78 Accepts]: Start accepts. Automaton has 13348 states and 20240 transitions. Word has length 330 [2020-07-20 00:06:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:41,372 INFO L479 AbstractCegarLoop]: Abstraction has 13348 states and 20240 transitions. [2020-07-20 00:06:41,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:06:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 13348 states and 20240 transitions. [2020-07-20 00:06:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 00:06:41,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:41,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:06:41,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 00:06:41,400 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-07-20 00:06:41,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:41,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037381934] [2020-07-20 00:06:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:42,247 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:42,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037381934] [2020-07-20 00:06:42,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:42,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:06:42,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823843395] [2020-07-20 00:06:42,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:06:42,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:06:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:06:42,353 INFO L87 Difference]: Start difference. First operand 13348 states and 20240 transitions. Second operand 5 states. [2020-07-20 00:06:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:48,784 INFO L93 Difference]: Finished difference Result 30452 states and 45989 transitions. [2020-07-20 00:06:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:06:48,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-20 00:06:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:48,800 INFO L225 Difference]: With dead ends: 30452 [2020-07-20 00:06:48,800 INFO L226 Difference]: Without dead ends: 15894 [2020-07-20 00:06:48,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:06:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2020-07-20 00:06:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 15892. [2020-07-20 00:06:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15892 states. [2020-07-20 00:06:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15892 states to 15892 states and 23961 transitions. [2020-07-20 00:06:50,245 INFO L78 Accepts]: Start accepts. Automaton has 15892 states and 23961 transitions. Word has length 330 [2020-07-20 00:06:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:50,245 INFO L479 AbstractCegarLoop]: Abstraction has 15892 states and 23961 transitions. [2020-07-20 00:06:50,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:06:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 15892 states and 23961 transitions. [2020-07-20 00:06:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 00:06:50,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:50,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:06:50,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 00:06:50,270 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-07-20 00:06:50,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:50,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760391799] [2020-07-20 00:06:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:06:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:51,007 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:06:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:06:51,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760391799] [2020-07-20 00:06:51,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:51,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:06:51,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439943548] [2020-07-20 00:06:51,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:06:51,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:06:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:06:51,133 INFO L87 Difference]: Start difference. First operand 15892 states and 23961 transitions. Second operand 5 states. [2020-07-20 00:07:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:00,753 INFO L93 Difference]: Finished difference Result 41545 states and 62089 transitions. [2020-07-20 00:07:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:07:00,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-20 00:07:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:00,783 INFO L225 Difference]: With dead ends: 41545 [2020-07-20 00:07:00,783 INFO L226 Difference]: Without dead ends: 27789 [2020-07-20 00:07:00,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:07:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27789 states. [2020-07-20 00:07:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27789 to 16491. [2020-07-20 00:07:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16491 states. [2020-07-20 00:07:01,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16491 states to 16491 states and 24849 transitions. [2020-07-20 00:07:01,502 INFO L78 Accepts]: Start accepts. Automaton has 16491 states and 24849 transitions. Word has length 330 [2020-07-20 00:07:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:01,502 INFO L479 AbstractCegarLoop]: Abstraction has 16491 states and 24849 transitions. [2020-07-20 00:07:01,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:07:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 16491 states and 24849 transitions. [2020-07-20 00:07:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 00:07:01,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:01,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:01,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 00:07:01,521 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1227056241, now seen corresponding path program 1 times [2020-07-20 00:07:01,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:01,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072562751] [2020-07-20 00:07:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:02,272 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:07:02,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072562751] [2020-07-20 00:07:02,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:02,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:02,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163969750] [2020-07-20 00:07:02,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:02,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:02,378 INFO L87 Difference]: Start difference. First operand 16491 states and 24849 transitions. Second operand 4 states. [2020-07-20 00:07:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:09,390 INFO L93 Difference]: Finished difference Result 30491 states and 46183 transitions. [2020-07-20 00:07:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:09,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 00:07:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:09,414 INFO L225 Difference]: With dead ends: 30491 [2020-07-20 00:07:09,414 INFO L226 Difference]: Without dead ends: 20989 [2020-07-20 00:07:09,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20989 states. [2020-07-20 00:07:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20989 to 18395. [2020-07-20 00:07:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18395 states. [2020-07-20 00:07:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 27871 transitions. [2020-07-20 00:07:10,332 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 27871 transitions. Word has length 330 [2020-07-20 00:07:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:10,332 INFO L479 AbstractCegarLoop]: Abstraction has 18395 states and 27871 transitions. [2020-07-20 00:07:10,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 27871 transitions. [2020-07-20 00:07:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 00:07:10,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:10,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:10,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 00:07:10,345 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2000347144, now seen corresponding path program 1 times [2020-07-20 00:07:10,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:10,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000060778] [2020-07-20 00:07:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:10,969 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:07:11,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000060778] [2020-07-20 00:07:11,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:11,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:11,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198644376] [2020-07-20 00:07:11,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:11,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:11,075 INFO L87 Difference]: Start difference. First operand 18395 states and 27871 transitions. Second operand 4 states. [2020-07-20 00:07:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:18,055 INFO L93 Difference]: Finished difference Result 33823 states and 51649 transitions. [2020-07-20 00:07:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:18,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 00:07:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:18,081 INFO L225 Difference]: With dead ends: 33823 [2020-07-20 00:07:18,081 INFO L226 Difference]: Without dead ends: 23821 [2020-07-20 00:07:18,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23821 states. [2020-07-20 00:07:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23821 to 21819. [2020-07-20 00:07:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21819 states. [2020-07-20 00:07:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21819 states to 21819 states and 33359 transitions. [2020-07-20 00:07:19,203 INFO L78 Accepts]: Start accepts. Automaton has 21819 states and 33359 transitions. Word has length 332 [2020-07-20 00:07:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:19,204 INFO L479 AbstractCegarLoop]: Abstraction has 21819 states and 33359 transitions. [2020-07-20 00:07:19,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 21819 states and 33359 transitions. [2020-07-20 00:07:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 00:07:19,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:19,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:19,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 00:07:19,218 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:19,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2033012311, now seen corresponding path program 1 times [2020-07-20 00:07:19,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:19,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259999541] [2020-07-20 00:07:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:19,840 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:07:19,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259999541] [2020-07-20 00:07:19,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:19,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:19,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884468171] [2020-07-20 00:07:19,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:19,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:19,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:19,949 INFO L87 Difference]: Start difference. First operand 21819 states and 33359 transitions. Second operand 4 states. [2020-07-20 00:07:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:30,298 INFO L93 Difference]: Finished difference Result 59507 states and 90499 transitions. [2020-07-20 00:07:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:30,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 00:07:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:30,338 INFO L225 Difference]: With dead ends: 59507 [2020-07-20 00:07:30,338 INFO L226 Difference]: Without dead ends: 40395 [2020-07-20 00:07:30,357 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 [2020-07-20 00:07:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40395 states. [2020-07-20 00:07:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40395 to 22147. [2020-07-20 00:07:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22147 states. [2020-07-20 00:07:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22147 states to 22147 states and 33797 transitions. [2020-07-20 00:07:31,434 INFO L78 Accepts]: Start accepts. Automaton has 22147 states and 33797 transitions. Word has length 332 [2020-07-20 00:07:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:31,434 INFO L479 AbstractCegarLoop]: Abstraction has 22147 states and 33797 transitions. [2020-07-20 00:07:31,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22147 states and 33797 transitions. [2020-07-20 00:07:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 00:07:31,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:31,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:31,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 00:07:31,609 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -273553115, now seen corresponding path program 1 times [2020-07-20 00:07:31,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:31,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201111500] [2020-07-20 00:07:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:32,160 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:07:32,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201111500] [2020-07-20 00:07:32,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:32,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:32,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830667199] [2020-07-20 00:07:32,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:32,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:32,227 INFO L87 Difference]: Start difference. First operand 22147 states and 33797 transitions. Second operand 4 states. [2020-07-20 00:07:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:42,517 INFO L93 Difference]: Finished difference Result 59783 states and 90773 transitions. [2020-07-20 00:07:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:42,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 00:07:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:42,558 INFO L225 Difference]: With dead ends: 59783 [2020-07-20 00:07:42,558 INFO L226 Difference]: Without dead ends: 40691 [2020-07-20 00:07:42,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2020-07-20 00:07:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 22475. [2020-07-20 00:07:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22475 states. [2020-07-20 00:07:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22475 states to 22475 states and 34165 transitions. [2020-07-20 00:07:43,931 INFO L78 Accepts]: Start accepts. Automaton has 22475 states and 34165 transitions. Word has length 333 [2020-07-20 00:07:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:43,932 INFO L479 AbstractCegarLoop]: Abstraction has 22475 states and 34165 transitions. [2020-07-20 00:07:43,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 22475 states and 34165 transitions. [2020-07-20 00:07:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 00:07:43,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:43,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:43,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 00:07:43,951 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1275140562, now seen corresponding path program 1 times [2020-07-20 00:07:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:43,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833563892] [2020-07-20 00:07:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:44,817 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:07:44,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833563892] [2020-07-20 00:07:44,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:44,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 00:07:44,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508104697] [2020-07-20 00:07:44,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 00:07:44,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 00:07:44,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-20 00:07:44,961 INFO L87 Difference]: Start difference. First operand 22475 states and 34165 transitions. Second operand 10 states. [2020-07-20 00:07:45,471 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 00:07:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:56,374 INFO L93 Difference]: Finished difference Result 65989 states and 102088 transitions. [2020-07-20 00:07:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 00:07:56,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 333 [2020-07-20 00:07:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:56,436 INFO L225 Difference]: With dead ends: 65989 [2020-07-20 00:07:56,436 INFO L226 Difference]: Without dead ends: 51735 [2020-07-20 00:07:56,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-07-20 00:07:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51735 states. [2020-07-20 00:07:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51735 to 41573. [2020-07-20 00:07:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41573 states. [2020-07-20 00:07:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41573 states to 41573 states and 63357 transitions. [2020-07-20 00:07:59,119 INFO L78 Accepts]: Start accepts. Automaton has 41573 states and 63357 transitions. Word has length 333 [2020-07-20 00:07:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:59,119 INFO L479 AbstractCegarLoop]: Abstraction has 41573 states and 63357 transitions. [2020-07-20 00:07:59,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 00:07:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41573 states and 63357 transitions. [2020-07-20 00:07:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 00:07:59,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:59,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:07:59,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 00:07:59,144 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1537943031, now seen corresponding path program 1 times [2020-07-20 00:07:59,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:59,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583733013] [2020-07-20 00:07:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:07:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:59,926 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:07:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:08:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583733013] [2020-07-20 00:08:00,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:00,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:08:00,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808347649] [2020-07-20 00:08:00,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:08:00,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:08:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:08:00,089 INFO L87 Difference]: Start difference. First operand 41573 states and 63357 transitions. Second operand 5 states. [2020-07-20 00:08:00,734 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-07-20 00:08:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:08,532 INFO L93 Difference]: Finished difference Result 70055 states and 109281 transitions. [2020-07-20 00:08:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 00:08:08,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-20 00:08:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:08,597 INFO L225 Difference]: With dead ends: 70055 [2020-07-20 00:08:08,597 INFO L226 Difference]: Without dead ends: 49391 [2020-07-20 00:08:08,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:08:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49391 states. [2020-07-20 00:08:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49391 to 49389. [2020-07-20 00:08:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49389 states. [2020-07-20 00:08:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49389 states to 49389 states and 75753 transitions. [2020-07-20 00:08:11,895 INFO L78 Accepts]: Start accepts. Automaton has 49389 states and 75753 transitions. Word has length 333 [2020-07-20 00:08:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:08:11,895 INFO L479 AbstractCegarLoop]: Abstraction has 49389 states and 75753 transitions. [2020-07-20 00:08:11,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:08:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 49389 states and 75753 transitions. [2020-07-20 00:08:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 00:08:11,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:08:11,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:08:11,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 00:08:11,916 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:08:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:08:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1942664128, now seen corresponding path program 1 times [2020-07-20 00:08:11,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:08:11,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343725038] [2020-07-20 00:08:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:08:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:12,727 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:08:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:08:12,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343725038] [2020-07-20 00:08:12,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:12,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:08:12,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145962894] [2020-07-20 00:08:12,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:08:12,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:08:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:08:12,837 INFO L87 Difference]: Start difference. First operand 49389 states and 75753 transitions. Second operand 5 states. [2020-07-20 00:08:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:27,742 INFO L93 Difference]: Finished difference Result 144252 states and 220978 transitions. [2020-07-20 00:08:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:08:27,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-07-20 00:08:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:27,847 INFO L225 Difference]: With dead ends: 144252 [2020-07-20 00:08:27,847 INFO L226 Difference]: Without dead ends: 95694 [2020-07-20 00:08:27,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:08:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-20 00:08:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 95692. [2020-07-20 00:08:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95692 states. [2020-07-20 00:08:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95692 states to 95692 states and 145852 transitions. [2020-07-20 00:08:34,830 INFO L78 Accepts]: Start accepts. Automaton has 95692 states and 145852 transitions. Word has length 333 [2020-07-20 00:08:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:08:34,831 INFO L479 AbstractCegarLoop]: Abstraction has 95692 states and 145852 transitions. [2020-07-20 00:08:34,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:08:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 95692 states and 145852 transitions. [2020-07-20 00:08:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 00:08:34,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:08:34,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:08:34,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 00:08:34,864 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:08:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:08:34,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1968714646, now seen corresponding path program 1 times [2020-07-20 00:08:34,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:08:34,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216839963] [2020-07-20 00:08:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:08:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:35,563 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:08:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:08:35,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216839963] [2020-07-20 00:08:35,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:35,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:08:35,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560468143] [2020-07-20 00:08:35,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:08:35,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:08:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:08:35,635 INFO L87 Difference]: Start difference. First operand 95692 states and 145852 transitions. Second operand 5 states. [2020-07-20 00:08:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:52,238 INFO L93 Difference]: Finished difference Result 137921 states and 210173 transitions. [2020-07-20 00:08:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:08:52,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-20 00:08:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:52,364 INFO L225 Difference]: With dead ends: 137921 [2020-07-20 00:08:52,364 INFO L226 Difference]: Without dead ends: 95694 [2020-07-20 00:08:52,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:08:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95694 states. [2020-07-20 00:09:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95694 to 91406. [2020-07-20 00:09:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91406 states. [2020-07-20 00:09:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91406 states to 91406 states and 139668 transitions. [2020-07-20 00:09:00,945 INFO L78 Accepts]: Start accepts. Automaton has 91406 states and 139668 transitions. Word has length 334 [2020-07-20 00:09:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:00,945 INFO L479 AbstractCegarLoop]: Abstraction has 91406 states and 139668 transitions. [2020-07-20 00:09:00,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:09:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 91406 states and 139668 transitions. [2020-07-20 00:09:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 00:09:00,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:00,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:09:00,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 00:09:00,974 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:00,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1241415225, now seen corresponding path program 1 times [2020-07-20 00:09:00,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:00,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047588398] [2020-07-20 00:09:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:09:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:01,543 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:09:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:09:01,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047588398] [2020-07-20 00:09:01,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:01,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:09:01,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396487181] [2020-07-20 00:09:01,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:09:01,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:09:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:01,609 INFO L87 Difference]: Start difference. First operand 91406 states and 139668 transitions. Second operand 4 states. [2020-07-20 00:09:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:09:25,240 INFO L93 Difference]: Finished difference Result 270320 states and 412826 transitions. [2020-07-20 00:09:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:09:25,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 00:09:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:09:25,480 INFO L225 Difference]: With dead ends: 270320 [2020-07-20 00:09:25,480 INFO L226 Difference]: Without dead ends: 180528 [2020-07-20 00:09:25,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180528 states. [2020-07-20 00:09:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180528 to 91750. [2020-07-20 00:09:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91750 states. [2020-07-20 00:09:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91750 states to 91750 states and 140036 transitions. [2020-07-20 00:09:36,004 INFO L78 Accepts]: Start accepts. Automaton has 91750 states and 140036 transitions. Word has length 337 [2020-07-20 00:09:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:36,004 INFO L479 AbstractCegarLoop]: Abstraction has 91750 states and 140036 transitions. [2020-07-20 00:09:36,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:09:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 91750 states and 140036 transitions. [2020-07-20 00:09:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 00:09:36,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:36,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:09:36,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 00:09:36,039 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:36,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1683426062, now seen corresponding path program 1 times [2020-07-20 00:09:36,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:36,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331396141] [2020-07-20 00:09:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:09:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:37,011 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:09:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:09:37,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331396141] [2020-07-20 00:09:37,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:37,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:09:37,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256604704] [2020-07-20 00:09:37,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:09:37,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:09:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:37,109 INFO L87 Difference]: Start difference. First operand 91750 states and 140036 transitions. Second operand 4 states. [2020-07-20 00:09:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:09:59,735 INFO L93 Difference]: Finished difference Result 264309 states and 403517 transitions. [2020-07-20 00:09:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:09:59,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 00:09:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:09:59,958 INFO L225 Difference]: With dead ends: 264309 [2020-07-20 00:09:59,958 INFO L226 Difference]: Without dead ends: 177799 [2020-07-20 00:10:00,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177799 states. [2020-07-20 00:10:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177799 to 177797. [2020-07-20 00:10:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177797 states. [2020-07-20 00:10:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177797 states to 177797 states and 270305 transitions. [2020-07-20 00:10:17,982 INFO L78 Accepts]: Start accepts. Automaton has 177797 states and 270305 transitions. Word has length 337 [2020-07-20 00:10:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:10:17,983 INFO L479 AbstractCegarLoop]: Abstraction has 177797 states and 270305 transitions. [2020-07-20 00:10:17,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:10:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 177797 states and 270305 transitions. [2020-07-20 00:10:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 00:10:18,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:18,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:10:18,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 00:10:18,039 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1966579330, now seen corresponding path program 1 times [2020-07-20 00:10:18,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:18,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314079328] [2020-07-20 00:10:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:10:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:18,615 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:10:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:10:18,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314079328] [2020-07-20 00:10:18,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:18,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:10:18,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805045637] [2020-07-20 00:10:18,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:10:18,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:10:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:18,709 INFO L87 Difference]: Start difference. First operand 177797 states and 270305 transitions. Second operand 4 states. [2020-07-20 00:10:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:57,874 INFO L93 Difference]: Finished difference Result 512409 states and 777349 transitions. [2020-07-20 00:10:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:10:57,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 00:10:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:58,296 INFO L225 Difference]: With dead ends: 512409 [2020-07-20 00:10:58,296 INFO L226 Difference]: Without dead ends: 337394 [2020-07-20 00:10:58,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337394 states. [2020-07-20 00:11:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337394 to 337392. [2020-07-20 00:11:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337392 states. [2020-07-20 00:11:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337392 states to 337392 states and 507965 transitions. [2020-07-20 00:11:33,791 INFO L78 Accepts]: Start accepts. Automaton has 337392 states and 507965 transitions. Word has length 339 [2020-07-20 00:11:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:11:33,792 INFO L479 AbstractCegarLoop]: Abstraction has 337392 states and 507965 transitions. [2020-07-20 00:11:33,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:11:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 337392 states and 507965 transitions. [2020-07-20 00:11:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 00:11:33,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:11:33,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:11:33,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 00:11:33,904 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:11:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:11:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1882657510, now seen corresponding path program 1 times [2020-07-20 00:11:33,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:11:33,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235163054] [2020-07-20 00:11:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:11:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:34,621 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:11:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:11:34,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235163054] [2020-07-20 00:11:34,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:11:34,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:11:34,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865547614] [2020-07-20 00:11:34,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:11:34,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:11:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:11:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:11:34,695 INFO L87 Difference]: Start difference. First operand 337392 states and 507965 transitions. Second operand 5 states. [2020-07-20 00:12:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:12:19,435 INFO L93 Difference]: Finished difference Result 699505 states and 1050397 transitions. [2020-07-20 00:12:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:12:19,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-20 00:12:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:12:19,899 INFO L225 Difference]: With dead ends: 699505 [2020-07-20 00:12:19,900 INFO L226 Difference]: Without dead ends: 352215 [2020-07-20 00:12:20,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:12:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352215 states. [2020-07-20 00:12:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352215 to 352213. [2020-07-20 00:12:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352213 states. [2020-07-20 00:12:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352213 states to 352213 states and 526237 transitions. [2020-07-20 00:12:57,628 INFO L78 Accepts]: Start accepts. Automaton has 352213 states and 526237 transitions. Word has length 339 [2020-07-20 00:12:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:12:57,628 INFO L479 AbstractCegarLoop]: Abstraction has 352213 states and 526237 transitions. [2020-07-20 00:12:57,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:12:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 352213 states and 526237 transitions. [2020-07-20 00:12:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 00:12:57,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:12:57,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:12:57,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 00:12:57,752 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:12:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:12:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1719490276, now seen corresponding path program 1 times [2020-07-20 00:12:57,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:12:57,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535896229] [2020-07-20 00:12:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:12:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:58,398 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:12:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:12:58,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535896229] [2020-07-20 00:12:58,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:12:58,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:12:58,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252839791] [2020-07-20 00:12:58,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:12:58,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:12:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:12:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:58,469 INFO L87 Difference]: Start difference. First operand 352213 states and 526237 transitions. Second operand 4 states. [2020-07-20 00:14:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:14:06,411 INFO L93 Difference]: Finished difference Result 846681 states and 1282567 transitions. [2020-07-20 00:14:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:14:06,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 00:14:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:14:07,253 INFO L225 Difference]: With dead ends: 846681 [2020-07-20 00:14:07,254 INFO L226 Difference]: Without dead ends: 557571 [2020-07-20 00:14:07,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:14:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557571 states. [2020-07-20 00:15:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557571 to 514081. [2020-07-20 00:15:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514081 states. [2020-07-20 00:15:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514081 states to 514081 states and 776541 transitions. [2020-07-20 00:15:11,084 INFO L78 Accepts]: Start accepts. Automaton has 514081 states and 776541 transitions. Word has length 340 [2020-07-20 00:15:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:15:11,084 INFO L479 AbstractCegarLoop]: Abstraction has 514081 states and 776541 transitions. [2020-07-20 00:15:11,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:15:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 514081 states and 776541 transitions. [2020-07-20 00:15:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 00:15:11,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:15:11,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:15:11,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 00:15:11,218 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:15:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:15:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash 989201276, now seen corresponding path program 1 times [2020-07-20 00:15:11,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:15:11,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811057281] [2020-07-20 00:15:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@302a6e3d [2020-07-20 00:15:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:11,752 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-20 00:15:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:15:11,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811057281] [2020-07-20 00:15:11,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:15:11,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:15:11,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959589979] [2020-07-20 00:15:11,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:15:11,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:15:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:15:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:15:11,817 INFO L87 Difference]: Start difference. First operand 514081 states and 776541 transitions. Second operand 4 states. [2020-07-20 00:17:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:17:12,006 INFO L93 Difference]: Finished difference Result 1513801 states and 2288443 transitions. [2020-07-20 00:17:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:17:12,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 00:17:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:17:13,452 INFO L225 Difference]: With dead ends: 1513801 [2020-07-20 00:17:13,452 INFO L226 Difference]: Without dead ends: 1018563 [2020-07-20 00:17:13,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:17:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018563 states.