/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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:58:28,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:58:28,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:58:28,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:58:28,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:58:28,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:58:28,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:58:28,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:58:28,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:58:28,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:58:28,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:58:28,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:58:28,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:58:28,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:58:28,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:58:28,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:58:28,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:58:28,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:58:28,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:58:28,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:58:28,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:58:28,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:58:28,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:58:28,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:58:28,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:58:28,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:58:28,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:58:28,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:58:28,363 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 [2020-07-19 23:58:28,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:58:28,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:58:28,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:58:28,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:58:28,380 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:58:28,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:58:28,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:58:28,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:58:28,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:58:28,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:58:28,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:58:28,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:58:28,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:58:28,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:58:28,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:58:28,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:58:28,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:58:28,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:58:28,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:58:28,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:58:28,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:58:28,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:58:28,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:58:28,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:58:28,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:58:28,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:58:28,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:58:28,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:58:28,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:58:28,385 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 [2020-07-19 23:58:28,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:58:28,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:58:28,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:58:28,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:58:28,702 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:58:28,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-19 23:58:28,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e873aa9a/e9126b6278d64ec1b225cfd3188bd0bd/FLAG19bdc3b54 [2020-07-19 23:58:29,536 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:58:29,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-19 23:58:29,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e873aa9a/e9126b6278d64ec1b225cfd3188bd0bd/FLAG19bdc3b54 [2020-07-19 23:58:29,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e873aa9a/e9126b6278d64ec1b225cfd3188bd0bd [2020-07-19 23:58:29,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:58:29,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:58:29,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:58:29,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:58:29,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:58:29,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:58:29" (1/1) ... [2020-07-19 23:58:29,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ad6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:29, skipping insertion in model container [2020-07-19 23:58:29,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:58:29" (1/1) ... [2020-07-19 23:58:29,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:58:29,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:58:31,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:58:31,417 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:58:32,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:58:32,589 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:58:32,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32 WrapperNode [2020-07-19 23:58:32,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:58:32,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:58:32,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:58:32,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:58:32,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (1/1) ... [2020-07-19 23:58:32,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:58:32,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:58:32,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:58:32,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:58:32,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (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 [2020-07-19 23:58:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:58:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:58:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:58:32,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:58:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:58:32,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 23:58:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-19 23:58:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 23:58:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-19 23:58:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:58:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:58:32,925 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-19 23:58:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-19 23:58:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-19 23:58:32,926 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-19 23:58:32,928 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-19 23:58:32,928 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-19 23:58:32,928 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-19 23:58:32,928 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 23:58:32,929 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 23:58:32,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:58:32,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:58:32,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:58:37,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:58:37,222 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:58:37,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:58:37 BoogieIcfgContainer [2020-07-19 23:58:37,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:58:37,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:58:37,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:58:37,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:58:37,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:58:29" (1/3) ... [2020-07-19 23:58:37,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e2def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:58:37, skipping insertion in model container [2020-07-19 23:58:37,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:58:32" (2/3) ... [2020-07-19 23:58:37,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e2def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:58:37, skipping insertion in model container [2020-07-19 23:58:37,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:58:37" (3/3) ... [2020-07-19 23:58:37,246 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-19 23:58:37,258 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:58:37,268 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-19 23:58:37,283 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-19 23:58:37,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:58:37,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:58:37,319 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:58:37,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:58:37,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:58:37,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:58:37,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:58:37,319 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:58:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-19 23:58:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-19 23:58:37,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:58:37,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:58:37,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:58:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:58:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-19 23:58:37,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:58:37,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975135168] [2020-07-19 23:58:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-19 23:58:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:41,710 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-19 23:58:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:58:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:58:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975135168] [2020-07-19 23:58:42,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:58:42,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:58:42,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555890752] [2020-07-19 23:58:42,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:58:42,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:58:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:58:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:58:42,264 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2020-07-19 23:59:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:00,749 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-07-19 23:59:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:59:00,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-07-19 23:59:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:00,796 INFO L225 Difference]: With dead ends: 4125 [2020-07-19 23:59:00,796 INFO L226 Difference]: Without dead ends: 2741 [2020-07-19 23:59:00,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:59:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-07-19 23:59:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-07-19 23:59:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-07-19 23:59:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-07-19 23:59:01,057 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-07-19 23:59:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:01,059 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-07-19 23:59:01,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:59:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-07-19 23:59:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-19 23:59:01,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:01,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:01,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:59:01,078 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-07-19 23:59:01,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:01,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128599412] [2020-07-19 23:59:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-19 23:59:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:02,588 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-19 23:59:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:03,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128599412] [2020-07-19 23:59:03,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:03,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:03,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36241286] [2020-07-19 23:59:03,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:03,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:03,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:03,347 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 4 states. [2020-07-19 23:59:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:23,089 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-07-19 23:59:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:59:23,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-19 23:59:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:23,120 INFO L225 Difference]: With dead ends: 7793 [2020-07-19 23:59:23,121 INFO L226 Difference]: Without dead ends: 5319 [2020-07-19 23:59:23,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-07-19 23:59:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-07-19 23:59:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-07-19 23:59:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-07-19 23:59:23,346 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-07-19 23:59:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:23,348 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-07-19 23:59:23,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:59:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-07-19 23:59:23,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-19 23:59:23,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:23,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:23,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:59:23,372 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-07-19 23:59:23,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:23,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013623941] [2020-07-19 23:59:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-19 23:59:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:24,455 WARN L193 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-19 23:59:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:24,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013623941] [2020-07-19 23:59:24,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:24,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:24,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506465361] [2020-07-19 23:59:24,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:24,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:24,714 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 4 states. [2020-07-19 23:59:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:59:44,263 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2020-07-19 23:59:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:59:44,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-19 23:59:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:59:44,310 INFO L225 Difference]: With dead ends: 15707 [2020-07-19 23:59:44,311 INFO L226 Difference]: Without dead ends: 10491 [2020-07-19 23:59:44,323 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 [2020-07-19 23:59:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2020-07-19 23:59:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2020-07-19 23:59:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-07-19 23:59:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2020-07-19 23:59:44,600 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2020-07-19 23:59:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:59:44,600 INFO L479 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2020-07-19 23:59:44,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:59:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2020-07-19 23:59:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-19 23:59:44,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:59:44,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:59:44,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:59:44,623 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:59:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:59:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1389649697, now seen corresponding path program 1 times [2020-07-19 23:59:44,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:59:44,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880843492] [2020-07-19 23:59:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-19 23:59:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:45,975 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-19 23:59:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:59:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:59:46,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880843492] [2020-07-19 23:59:46,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:59:46,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:59:46,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444092457] [2020-07-19 23:59:46,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:59:46,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:59:46,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:59:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:59:46,234 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2020-07-20 00:00:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:05,290 INFO L93 Difference]: Finished difference Result 15285 states and 24839 transitions. [2020-07-20 00:00:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:05,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 00:00:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:05,335 INFO L225 Difference]: With dead ends: 15285 [2020-07-20 00:00:05,335 INFO L226 Difference]: Without dead ends: 10369 [2020-07-20 00:00:05,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-07-20 00:00:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2020-07-20 00:00:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2020-07-20 00:00:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16752 transitions. [2020-07-20 00:00:05,805 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16752 transitions. Word has length 477 [2020-07-20 00:00:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:05,806 INFO L479 AbstractCegarLoop]: Abstraction has 10320 states and 16752 transitions. [2020-07-20 00:00:05,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16752 transitions. [2020-07-20 00:00:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 00:00:05,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:05,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:05,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 00:00:05,838 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash 464533692, now seen corresponding path program 1 times [2020-07-20 00:00:05,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:05,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184156068] [2020-07-20 00:00:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:00:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:06,742 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:00:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:06,907 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 00:00:06,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184156068] [2020-07-20 00:00:06,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:06,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:06,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225456373] [2020-07-20 00:00:06,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:06,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:06,910 INFO L87 Difference]: Start difference. First operand 10320 states and 16752 transitions. Second operand 4 states. [2020-07-20 00:00:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:25,797 INFO L93 Difference]: Finished difference Result 30704 states and 49811 transitions. [2020-07-20 00:00:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:25,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 00:00:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:25,843 INFO L225 Difference]: With dead ends: 30704 [2020-07-20 00:00:25,843 INFO L226 Difference]: Without dead ends: 20528 [2020-07-20 00:00:25,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20528 states. [2020-07-20 00:00:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20528 to 10418. [2020-07-20 00:00:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-07-20 00:00:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16903 transitions. [2020-07-20 00:00:26,386 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16903 transitions. Word has length 477 [2020-07-20 00:00:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:26,386 INFO L479 AbstractCegarLoop]: Abstraction has 10418 states and 16903 transitions. [2020-07-20 00:00:26,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16903 transitions. [2020-07-20 00:00:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 00:00:26,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:26,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:26,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 00:00:26,413 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1703695035, now seen corresponding path program 1 times [2020-07-20 00:00:26,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:26,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891037156] [2020-07-20 00:00:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:00:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:27,325 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:00:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:27,554 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 00:00:27,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891037156] [2020-07-20 00:00:27,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:27,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:27,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543916625] [2020-07-20 00:00:27,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:27,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:27,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:27,558 INFO L87 Difference]: Start difference. First operand 10418 states and 16903 transitions. Second operand 4 states. [2020-07-20 00:00:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:00:46,709 INFO L93 Difference]: Finished difference Result 30839 states and 49992 transitions. [2020-07-20 00:00:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:00:46,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-20 00:00:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:00:46,755 INFO L225 Difference]: With dead ends: 30839 [2020-07-20 00:00:46,756 INFO L226 Difference]: Without dead ends: 20645 [2020-07-20 00:00:46,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20645 states. [2020-07-20 00:00:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20645 to 10535. [2020-07-20 00:00:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2020-07-20 00:00:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17049 transitions. [2020-07-20 00:00:47,238 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17049 transitions. Word has length 478 [2020-07-20 00:00:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:00:47,238 INFO L479 AbstractCegarLoop]: Abstraction has 10535 states and 17049 transitions. [2020-07-20 00:00:47,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:00:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17049 transitions. [2020-07-20 00:00:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 00:00:47,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:00:47,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:47,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 00:00:47,262 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:00:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:00:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2050355686, now seen corresponding path program 1 times [2020-07-20 00:00:47,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:00:47,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150917662] [2020-07-20 00:00:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:00:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:48,497 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:00:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:00:48,837 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 00:00:48,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150917662] [2020-07-20 00:00:48,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:00:48,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:00:48,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51969834] [2020-07-20 00:00:48,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:00:48,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:00:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:00:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:00:48,839 INFO L87 Difference]: Start difference. First operand 10535 states and 17049 transitions. Second operand 4 states. [2020-07-20 00:01:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:08,460 INFO L93 Difference]: Finished difference Result 29921 states and 48292 transitions. [2020-07-20 00:01:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:01:08,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 00:01:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:08,502 INFO L225 Difference]: With dead ends: 29921 [2020-07-20 00:01:08,502 INFO L226 Difference]: Without dead ends: 20355 [2020-07-20 00:01:08,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:01:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2020-07-20 00:01:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2020-07-20 00:01:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2020-07-20 00:01:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32714 transitions. [2020-07-20 00:01:09,306 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32714 transitions. Word has length 479 [2020-07-20 00:01:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:09,307 INFO L479 AbstractCegarLoop]: Abstraction has 20308 states and 32714 transitions. [2020-07-20 00:01:09,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:01:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32714 transitions. [2020-07-20 00:01:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 00:01:09,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:09,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:09,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 00:01:09,344 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash 421785385, now seen corresponding path program 1 times [2020-07-20 00:01:09,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:09,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563084276] [2020-07-20 00:01:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:01:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:11,303 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:01:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:11,700 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 00:01:11,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563084276] [2020-07-20 00:01:11,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:01:11,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:01:11,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661510830] [2020-07-20 00:01:11,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:01:11,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:01:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:01:11,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:01:11,704 INFO L87 Difference]: Start difference. First operand 20308 states and 32714 transitions. Second operand 5 states. [2020-07-20 00:01:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:27,449 INFO L93 Difference]: Finished difference Result 48200 states and 78307 transitions. [2020-07-20 00:01:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:01:27,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-20 00:01:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:27,500 INFO L225 Difference]: With dead ends: 48200 [2020-07-20 00:01:27,501 INFO L226 Difference]: Without dead ends: 24710 [2020-07-20 00:01:27,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:01:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2020-07-20 00:01:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24654. [2020-07-20 00:01:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24654 states. [2020-07-20 00:01:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24654 states to 24654 states and 39929 transitions. [2020-07-20 00:01:28,501 INFO L78 Accepts]: Start accepts. Automaton has 24654 states and 39929 transitions. Word has length 479 [2020-07-20 00:01:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:28,502 INFO L479 AbstractCegarLoop]: Abstraction has 24654 states and 39929 transitions. [2020-07-20 00:01:28,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:01:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24654 states and 39929 transitions. [2020-07-20 00:01:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 00:01:28,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:28,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:28,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 00:01:28,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -144584500, now seen corresponding path program 1 times [2020-07-20 00:01:28,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:28,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571154425] [2020-07-20 00:01:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:01:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:29,862 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:01:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:30,389 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 00:01:30,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571154425] [2020-07-20 00:01:30,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:01:30,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:01:30,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572376364] [2020-07-20 00:01:30,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:01:30,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:01:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:01:30,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:01:30,394 INFO L87 Difference]: Start difference. First operand 24654 states and 39929 transitions. Second operand 4 states. [2020-07-20 00:01:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:01:52,340 INFO L93 Difference]: Finished difference Result 72114 states and 116848 transitions. [2020-07-20 00:01:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:01:52,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-20 00:01:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:01:52,401 INFO L225 Difference]: With dead ends: 72114 [2020-07-20 00:01:52,401 INFO L226 Difference]: Without dead ends: 48480 [2020-07-20 00:01:52,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:01:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2020-07-20 00:01:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 48442. [2020-07-20 00:01:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48442 states. [2020-07-20 00:01:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48442 states to 48442 states and 78181 transitions. [2020-07-20 00:01:55,932 INFO L78 Accepts]: Start accepts. Automaton has 48442 states and 78181 transitions. Word has length 481 [2020-07-20 00:01:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:01:55,932 INFO L479 AbstractCegarLoop]: Abstraction has 48442 states and 78181 transitions. [2020-07-20 00:01:55,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:01:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48442 states and 78181 transitions. [2020-07-20 00:01:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 00:01:55,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:01:55,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:55,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 00:01:55,982 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:01:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:01:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1057078058, now seen corresponding path program 1 times [2020-07-20 00:01:55,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:01:55,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125903001] [2020-07-20 00:01:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:01:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:56,959 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:01:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:01:57,152 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 00:01:57,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125903001] [2020-07-20 00:01:57,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:01:57,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:01:57,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102674444] [2020-07-20 00:01:57,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:01:57,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:01:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:01:57,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:01:57,155 INFO L87 Difference]: Start difference. First operand 48442 states and 78181 transitions. Second operand 4 states. [2020-07-20 00:02:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:02:12,078 INFO L93 Difference]: Finished difference Result 140578 states and 226573 transitions. [2020-07-20 00:02:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:02:12,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-20 00:02:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:02:12,179 INFO L225 Difference]: With dead ends: 140578 [2020-07-20 00:02:12,179 INFO L226 Difference]: Without dead ends: 94529 [2020-07-20 00:02:12,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:02:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94529 states. [2020-07-20 00:02:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94529 to 48832. [2020-07-20 00:02:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48832 states. [2020-07-20 00:02:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48832 states to 48832 states and 78757 transitions. [2020-07-20 00:02:16,533 INFO L78 Accepts]: Start accepts. Automaton has 48832 states and 78757 transitions. Word has length 482 [2020-07-20 00:02:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:02:16,539 INFO L479 AbstractCegarLoop]: Abstraction has 48832 states and 78757 transitions. [2020-07-20 00:02:16,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:02:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 48832 states and 78757 transitions. [2020-07-20 00:02:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 00:02:16,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:02:16,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:16,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 00:02:16,595 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:02:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:02:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash 70611185, now seen corresponding path program 1 times [2020-07-20 00:02:16,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:02:16,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35281232] [2020-07-20 00:02:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:02:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:17,673 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:02:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:17,931 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 00:02:17,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35281232] [2020-07-20 00:02:17,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:02:17,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:02:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147092041] [2020-07-20 00:02:17,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:02:17,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:02:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:02:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:02:17,933 INFO L87 Difference]: Start difference. First operand 48832 states and 78757 transitions. Second operand 4 states. [2020-07-20 00:02:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:02:42,781 INFO L93 Difference]: Finished difference Result 141955 states and 228801 transitions. [2020-07-20 00:02:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:02:42,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 00:02:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:02:42,893 INFO L225 Difference]: With dead ends: 141955 [2020-07-20 00:02:42,894 INFO L226 Difference]: Without dead ends: 95973 [2020-07-20 00:02:42,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:02:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95973 states. [2020-07-20 00:02:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95973 to 95937. [2020-07-20 00:02:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95937 states. [2020-07-20 00:02:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95937 states to 95937 states and 154156 transitions. [2020-07-20 00:02:47,293 INFO L78 Accepts]: Start accepts. Automaton has 95937 states and 154156 transitions. Word has length 483 [2020-07-20 00:02:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:02:47,294 INFO L479 AbstractCegarLoop]: Abstraction has 95937 states and 154156 transitions. [2020-07-20 00:02:47,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:02:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 95937 states and 154156 transitions. [2020-07-20 00:02:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 00:02:47,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:02:47,377 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:47,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 00:02:47,377 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:02:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:02:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 167240436, now seen corresponding path program 1 times [2020-07-20 00:02:47,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:02:47,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751780607] [2020-07-20 00:02:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:02:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:49,220 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:02:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:02:49,387 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 00:02:49,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751780607] [2020-07-20 00:02:49,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:02:49,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:02:49,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556415159] [2020-07-20 00:02:49,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:02:49,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:02:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:02:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:02:49,390 INFO L87 Difference]: Start difference. First operand 95937 states and 154156 transitions. Second operand 5 states. [2020-07-20 00:03:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:03:14,480 INFO L93 Difference]: Finished difference Result 235606 states and 381258 transitions. [2020-07-20 00:03:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:03:14,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-07-20 00:03:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:03:14,632 INFO L225 Difference]: With dead ends: 235606 [2020-07-20 00:03:14,632 INFO L226 Difference]: Without dead ends: 121441 [2020-07-20 00:03:14,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:03:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121441 states. [2020-07-20 00:03:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121441 to 121356. [2020-07-20 00:03:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121356 states. [2020-07-20 00:03:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121356 states to 121356 states and 195892 transitions. [2020-07-20 00:03:22,393 INFO L78 Accepts]: Start accepts. Automaton has 121356 states and 195892 transitions. Word has length 483 [2020-07-20 00:03:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:03:22,393 INFO L479 AbstractCegarLoop]: Abstraction has 121356 states and 195892 transitions. [2020-07-20 00:03:22,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:03:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121356 states and 195892 transitions. [2020-07-20 00:03:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:03:22,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:03:22,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:22,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 00:03:22,547 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:03:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:03:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 11218692, now seen corresponding path program 1 times [2020-07-20 00:03:22,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:03:22,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140517688] [2020-07-20 00:03:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:03:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:23,739 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:03:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:03:23,933 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 00:03:23,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140517688] [2020-07-20 00:03:23,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:03:23,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:03:23,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147328958] [2020-07-20 00:03:23,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:03:23,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:03:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:03:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:03:23,935 INFO L87 Difference]: Start difference. First operand 121356 states and 195892 transitions. Second operand 4 states. [2020-07-20 00:03:24,736 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-07-20 00:03:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:03:45,838 INFO L93 Difference]: Finished difference Result 221246 states and 346342 transitions. [2020-07-20 00:03:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:03:45,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 00:03:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:03:46,019 INFO L225 Difference]: With dead ends: 221246 [2020-07-20 00:03:46,019 INFO L226 Difference]: Without dead ends: 171145 [2020-07-20 00:03:46,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:03:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171145 states. [2020-07-20 00:03:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171145 to 170764. [2020-07-20 00:03:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170764 states. [2020-07-20 00:03:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170764 states to 170764 states and 269116 transitions. [2020-07-20 00:03:58,068 INFO L78 Accepts]: Start accepts. Automaton has 170764 states and 269116 transitions. Word has length 485 [2020-07-20 00:03:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:03:58,068 INFO L479 AbstractCegarLoop]: Abstraction has 170764 states and 269116 transitions. [2020-07-20 00:03:58,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:03:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 170764 states and 269116 transitions. [2020-07-20 00:03:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:03:58,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:03:58,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:58,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 00:03:58,219 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:03:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:03:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 784767583, now seen corresponding path program 1 times [2020-07-20 00:03:58,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:03:58,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823843461] [2020-07-20 00:03:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:03:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:04:00,467 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:04:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:04:01,040 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 00:04:01,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823843461] [2020-07-20 00:04:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:04:01,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-20 00:04:01,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689919338] [2020-07-20 00:04:01,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 00:04:01,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:04:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 00:04:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-07-20 00:04:01,043 INFO L87 Difference]: Start difference. First operand 170764 states and 269116 transitions. Second operand 18 states. [2020-07-20 00:04:02,055 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-20 00:04:20,030 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-07-20 00:04:24,279 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-07-20 00:04:29,155 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-07-20 00:05:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:05:06,966 INFO L93 Difference]: Finished difference Result 458459 states and 713349 transitions. [2020-07-20 00:05:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 00:05:06,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 485 [2020-07-20 00:05:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:05:07,534 INFO L225 Difference]: With dead ends: 458459 [2020-07-20 00:05:07,535 INFO L226 Difference]: Without dead ends: 443454 [2020-07-20 00:05:07,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=732, Invalid=1920, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 00:05:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443454 states. [2020-07-20 00:05:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443454 to 222444. [2020-07-20 00:05:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222444 states. [2020-07-20 00:05:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222444 states to 222444 states and 348524 transitions. [2020-07-20 00:05:33,921 INFO L78 Accepts]: Start accepts. Automaton has 222444 states and 348524 transitions. Word has length 485 [2020-07-20 00:05:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:05:33,922 INFO L479 AbstractCegarLoop]: Abstraction has 222444 states and 348524 transitions. [2020-07-20 00:05:33,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 00:05:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 222444 states and 348524 transitions. [2020-07-20 00:05:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:05:34,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:05:34,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:34,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 00:05:34,089 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:05:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:05:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1866960202, now seen corresponding path program 1 times [2020-07-20 00:05:34,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:05:34,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520705412] [2020-07-20 00:05:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:05:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:36,051 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:05:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:05:37,152 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 00:05:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520705412] [2020-07-20 00:05:37,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:05:37,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 00:05:37,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823695980] [2020-07-20 00:05:37,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 00:05:37,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:05:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 00:05:37,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 00:05:37,156 INFO L87 Difference]: Start difference. First operand 222444 states and 348524 transitions. Second operand 14 states. [2020-07-20 00:05:38,325 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification that was a NOOP. DAG size: 421 [2020-07-20 00:06:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:06:21,369 INFO L93 Difference]: Finished difference Result 306366 states and 476424 transitions. [2020-07-20 00:06:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 00:06:21,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 485 [2020-07-20 00:06:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:06:21,650 INFO L225 Difference]: With dead ends: 306366 [2020-07-20 00:06:21,650 INFO L226 Difference]: Without dead ends: 267041 [2020-07-20 00:06:21,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 00:06:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267041 states. [2020-07-20 00:06:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267041 to 183276. [2020-07-20 00:06:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183276 states. [2020-07-20 00:06:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183276 states to 183276 states and 287116 transitions. [2020-07-20 00:06:36,232 INFO L78 Accepts]: Start accepts. Automaton has 183276 states and 287116 transitions. Word has length 485 [2020-07-20 00:06:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:06:36,233 INFO L479 AbstractCegarLoop]: Abstraction has 183276 states and 287116 transitions. [2020-07-20 00:06:36,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 00:06:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 183276 states and 287116 transitions. [2020-07-20 00:06:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:06:36,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:36,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:36,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 00:06:36,400 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash 296961277, now seen corresponding path program 1 times [2020-07-20 00:06:36,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:36,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989447971] [2020-07-20 00:06:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:06:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:38,484 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:06:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:39,516 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 00:06:39,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989447971] [2020-07-20 00:06:39,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:39,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 00:06:39,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575070170] [2020-07-20 00:06:39,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 00:06:39,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 00:06:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 00:06:39,518 INFO L87 Difference]: Start difference. First operand 183276 states and 287116 transitions. Second operand 14 states. [2020-07-20 00:06:40,798 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 421 [2020-07-20 00:07:11,031 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-07-20 00:07:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:26,968 INFO L93 Difference]: Finished difference Result 269134 states and 420440 transitions. [2020-07-20 00:07:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 00:07:26,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 485 [2020-07-20 00:07:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:27,255 INFO L225 Difference]: With dead ends: 269134 [2020-07-20 00:07:27,255 INFO L226 Difference]: Without dead ends: 254129 [2020-07-20 00:07:27,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 00:07:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254129 states. [2020-07-20 00:07:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254129 to 193756. [2020-07-20 00:07:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193756 states. [2020-07-20 00:07:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193756 states to 193756 states and 302108 transitions. [2020-07-20 00:07:42,891 INFO L78 Accepts]: Start accepts. Automaton has 193756 states and 302108 transitions. Word has length 485 [2020-07-20 00:07:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:42,891 INFO L479 AbstractCegarLoop]: Abstraction has 193756 states and 302108 transitions. [2020-07-20 00:07:42,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 00:07:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 193756 states and 302108 transitions. [2020-07-20 00:07:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:07:43,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:43,048 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:43,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 00:07:43,048 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1379153896, now seen corresponding path program 1 times [2020-07-20 00:07:43,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:43,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152729815] [2020-07-20 00:07:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:07:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:44,329 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:07:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:45,391 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 00:07:45,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152729815] [2020-07-20 00:07:45,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:45,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:07:45,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730965469] [2020-07-20 00:07:45,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:07:45,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:07:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:07:45,398 INFO L87 Difference]: Start difference. First operand 193756 states and 302108 transitions. Second operand 5 states. [2020-07-20 00:08:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:37,051 INFO L93 Difference]: Finished difference Result 565768 states and 881331 transitions. [2020-07-20 00:08:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:08:37,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-07-20 00:08:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:37,553 INFO L225 Difference]: With dead ends: 565768 [2020-07-20 00:08:37,553 INFO L226 Difference]: Without dead ends: 376214 [2020-07-20 00:08:37,725 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 00:08:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376214 states. [2020-07-20 00:09:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376214 to 376161. [2020-07-20 00:09:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376161 states. [2020-07-20 00:09:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376161 states to 376161 states and 583882 transitions. [2020-07-20 00:09:17,478 INFO L78 Accepts]: Start accepts. Automaton has 376161 states and 583882 transitions. Word has length 485 [2020-07-20 00:09:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:17,479 INFO L479 AbstractCegarLoop]: Abstraction has 376161 states and 583882 transitions. [2020-07-20 00:09:17,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:09:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 376161 states and 583882 transitions. [2020-07-20 00:09:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 00:09:18,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:18,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:09:18,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 00:09:18,585 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1009787566, now seen corresponding path program 1 times [2020-07-20 00:09:18,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:18,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616489923] [2020-07-20 00:09:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39c3280e [2020-07-20 00:09:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:19,715 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 00:09:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:19,947 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 00:09:19,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616489923] [2020-07-20 00:09:19,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:19,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:09:19,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124966535] [2020-07-20 00:09:19,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:09:19,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:19,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:09:19,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:19,950 INFO L87 Difference]: Start difference. First operand 376161 states and 583882 transitions. Second operand 4 states.