/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:38:17,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:38:17,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:38:17,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:38:17,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:38:17,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:38:17,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:38:17,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:38:17,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:38:17,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:38:17,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:38:17,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:38:17,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:38:17,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:38:17,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:38:17,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:38:17,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:38:17,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:38:17,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:38:17,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:38:17,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:38:17,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:38:17,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:38:17,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:38:17,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:38:17,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:38:17,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:38:17,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:38:17,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 14:38:17,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:38:17,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:38:17,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:38:17,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:38:17,463 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:38:17,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:38:17,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:38:17,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:38:17,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:38:17,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:38:17,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:38:17,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:38:17,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:38:17,466 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:38:17,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:38:17,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:38:17,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:38:17,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:38:17,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:38:17,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:38:17,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:38:17,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:38:17,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:38:17,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:38:17,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:38:17,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:38:17,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:38:17,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:38:17,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:38:17,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 [2020-07-20 14:38:17,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:38:17,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:38:17,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:38:17,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:38:17,905 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:38:17,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-20 14:38:18,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b181d1934/188f9ca9aa9c4496812f960f3191be4d/FLAGdf6fa36e1 [2020-07-20 14:38:19,006 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:38:19,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-07-20 14:38:19,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b181d1934/188f9ca9aa9c4496812f960f3191be4d/FLAGdf6fa36e1 [2020-07-20 14:38:19,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b181d1934/188f9ca9aa9c4496812f960f3191be4d [2020-07-20 14:38:19,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:38:19,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:38:19,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:38:19,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:38:19,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:38:19,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:19,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce92148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19, skipping insertion in model container [2020-07-20 14:38:19,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:19,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:38:19,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:38:19,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:38:19,812 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:38:19,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:38:19,937 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:38:19,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19 WrapperNode [2020-07-20 14:38:19,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:38:19,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:38:19,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:38:19,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:38:19,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:19,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:19,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:19,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:20,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:20,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:20,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... [2020-07-20 14:38:20,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:38:20,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:38:20,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:38:20,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:38:20,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:38:20,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:38:20,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:38:20,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:38:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:38:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 14:38:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 14:38:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:38:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:38:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:38:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:38:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:38:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 14:38:23,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:38:23,306 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 14:38:23,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:38:23 BoogieIcfgContainer [2020-07-20 14:38:23,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:38:23,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:38:23,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:38:23,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:38:23,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:38:19" (1/3) ... [2020-07-20 14:38:23,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd0bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:38:23, skipping insertion in model container [2020-07-20 14:38:23,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:38:19" (2/3) ... [2020-07-20 14:38:23,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddd0bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:38:23, skipping insertion in model container [2020-07-20 14:38:23,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:38:23" (3/3) ... [2020-07-20 14:38:23,330 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-07-20 14:38:23,350 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:38:23,365 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:38:23,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:38:23,418 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:38:23,419 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:38:23,419 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:38:23,419 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:38:23,419 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:38:23,420 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:38:23,420 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:38:23,420 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:38:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 14:38:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:38:23,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:38:23,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:38:23,467 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:38:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:38:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-07-20 14:38:23,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:38:23,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580874357] [2020-07-20 14:38:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:38:40,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:38:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:38:40,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:38:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:38:40,415 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 14:38:40,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:38:40,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580874357] [2020-07-20 14:38:40,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:38:40,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:38:40,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897685201] [2020-07-20 14:38:40,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:38:40,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:38:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:38:40,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:38:40,469 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-20 14:38:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:38:40,590 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-07-20 14:38:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:38:40,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 14:38:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:38:40,606 INFO L225 Difference]: With dead ends: 38 [2020-07-20 14:38:40,606 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 14:38:40,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:38:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 14:38:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-07-20 14:38:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 14:38:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-20 14:38:40,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-07-20 14:38:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:38:40,683 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-20 14:38:40,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:38:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-20 14:38:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 14:38:40,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:38:40,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:38:40,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:38:40,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:38:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:38:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-07-20 14:38:40,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:38:40,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206754510] [2020-07-20 14:38:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:39:00,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:39:00,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:39:00,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:39:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:39:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:39:00,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:39:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:39:00,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206754510] [2020-07-20 14:39:00,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:39:00,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 14:39:00,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932905833] [2020-07-20 14:39:00,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:39:00,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:39:00,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:39:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:39:00,536 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2020-07-20 14:39:04,972 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 14:39:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:39:09,261 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-20 14:39:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:39:09,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 14:39:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:39:09,265 INFO L225 Difference]: With dead ends: 38 [2020-07-20 14:39:09,265 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:39:09,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=63, Invalid=118, Unknown=1, NotChecked=0, Total=182 [2020-07-20 14:39:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:39:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 14:39:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 14:39:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-20 14:39:09,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 17 [2020-07-20 14:39:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:39:09,281 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-20 14:39:09,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:39:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-20 14:39:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 14:39:09,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:39:09,284 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:39:09,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:39:09,487 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:39:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:39:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 2 times [2020-07-20 14:39:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:39:09,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719920898] [2020-07-20 14:39:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:40:00,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:40:00,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:40:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 14:40:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:40:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:40:02,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:40:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:40:02,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719920898] [2020-07-20 14:40:02,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:40:02,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 14:40:02,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703504994] [2020-07-20 14:40:02,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:40:02,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:40:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:40:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:40:02,528 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-07-20 14:40:11,177 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-20 14:40:17,884 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2020-07-20 14:40:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:40:18,140 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-07-20 14:40:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 14:40:18,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-07-20 14:40:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:40:18,143 INFO L225 Difference]: With dead ends: 68 [2020-07-20 14:40:18,143 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 14:40:18,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=191, Invalid=458, Unknown=1, NotChecked=0, Total=650 [2020-07-20 14:40:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 14:40:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-07-20 14:40:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 14:40:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-07-20 14:40:18,160 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 32 [2020-07-20 14:40:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:40:18,161 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-07-20 14:40:18,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:40:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-07-20 14:40:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 14:40:18,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:40:18,164 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:40:18,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:40:18,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:40:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:40:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1772338347, now seen corresponding path program 3 times [2020-07-20 14:40:18,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:40:18,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141816608] [2020-07-20 14:40:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:42:38,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:42:38,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:42:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 14:42:46,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:42:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:42:46,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:42:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 250 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:42:51,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141816608] [2020-07-20 14:42:51,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:42:51,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 14:42:51,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260951721] [2020-07-20 14:42:51,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 14:42:51,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:42:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 14:42:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=477, Unknown=2, NotChecked=0, Total=650 [2020-07-20 14:42:51,494 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 26 states. [2020-07-20 14:43:13,583 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-20 14:43:16,582 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 14:43:21,260 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 14:43:24,488 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 14:43:25,424 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 14:43:34,542 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 14:43:37,557 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-20 14:43:42,210 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2020-07-20 14:44:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:44:06,753 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-07-20 14:44:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 14:44:06,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-07-20 14:44:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:44:06,761 INFO L225 Difference]: With dead ends: 128 [2020-07-20 14:44:06,761 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 14:44:06,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=662, Invalid=1780, Unknown=8, NotChecked=0, Total=2450 [2020-07-20 14:44:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 14:44:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-07-20 14:44:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-20 14:44:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-07-20 14:44:06,789 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 62 [2020-07-20 14:44:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:44:06,790 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-07-20 14:44:06,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 14:44:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-07-20 14:44:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 14:44:06,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:44:06,793 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:44:06,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:44:06,996 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:44:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:44:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -357330133, now seen corresponding path program 4 times [2020-07-20 14:44:06,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:44:06,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990069696] [2020-07-20 14:44:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:50:36,321 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:50:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:50:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 14:50:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:50:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:45,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:50:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1215 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:50:57,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990069696] [2020-07-20 14:50:57,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:50:57,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 14:50:57,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528133521] [2020-07-20 14:50:57,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 14:50:57,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:50:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 14:50:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1824, Unknown=5, NotChecked=0, Total=2450 [2020-07-20 14:50:57,851 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 50 states. [2020-07-20 14:51:18,400 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 99 DAG size of output: 14 [2020-07-20 14:51:27,544 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-20 14:51:32,968 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-07-20 14:51:38,631 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-20 14:51:43,924 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 15 [2020-07-20 14:51:51,830 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-20 14:52:01,206 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-20 14:52:07,006 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-20 14:52:12,441 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-20 14:52:22,473 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 14:52:33,830 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 14:52:39,762 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 14:52:50,475 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 14:52:54,761 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15