/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 BIGGEST_EQUIVALENCE_CLASS --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/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:35:49,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:35:49,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:35:49,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:35:49,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:35:49,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:35:49,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:35:49,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:35:49,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:35:49,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:35:49,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:35:49,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:35:49,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:35:49,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:35:49,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:35:49,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:35:49,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:35:49,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:35:49,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:35:49,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:35:49,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:35:49,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:35:49,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:35:49,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:35:49,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:35:49,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:35:49,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:35:49,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:35:49,431 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 [2020-07-21 22:35:49,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:35:49,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:35:49,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:35:49,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:35:49,456 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:35:49,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:35:49,456 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:35:49,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:35:49,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:35:49,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:35:49,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:35:49,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:35:49,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:35:49,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:35:49,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:35:49,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:35:49,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:35:49,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:35:49,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:35:49,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:35:49,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:35:49,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:35:49,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:35:49,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:35:49,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:35:49,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:35:49,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:49,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:35:49,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:35:49,462 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:35:49,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:35:49,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:35:49,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:35:49,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:35:49,820 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:35:49,820 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-07-21 22:35:49,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed618764/c2fc4977d28844589b4a1b752a0cf23f/FLAGfce56e9f9 [2020-07-21 22:35:50,437 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:35:50,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2020-07-21 22:35:50,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed618764/c2fc4977d28844589b4a1b752a0cf23f/FLAGfce56e9f9 [2020-07-21 22:35:50,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fed618764/c2fc4977d28844589b4a1b752a0cf23f [2020-07-21 22:35:50,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:35:50,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:35:50,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:50,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:35:50,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:35:50,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:50" (1/1) ... [2020-07-21 22:35:50,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e242459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:50, skipping insertion in model container [2020-07-21 22:35:50,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:50" (1/1) ... [2020-07-21 22:35:50,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:35:50,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:35:51,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:51,039 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:35:51,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:51,084 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:35:51,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51 WrapperNode [2020-07-21 22:35:51,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:51,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:35:51,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:35:51,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:35:51,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (1/1) ... [2020-07-21 22:35:51,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:35:51,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:35:51,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:35:51,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:35:51,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (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 [2020-07-21 22:35:51,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:35:51,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:35:51,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:35:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:35:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:35:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:35:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:35:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:35:51,587 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:35:51,588 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:35:51,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:51 BoogieIcfgContainer [2020-07-21 22:35:51,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:35:51,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:35:51,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:35:51,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:35:51,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:35:50" (1/3) ... [2020-07-21 22:35:51,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53768fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:51, skipping insertion in model container [2020-07-21 22:35:51,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:51" (2/3) ... [2020-07-21 22:35:51,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53768fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:51, skipping insertion in model container [2020-07-21 22:35:51,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:51" (3/3) ... [2020-07-21 22:35:51,604 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-07-21 22:35:51,619 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:35:51,631 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:35:51,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:35:51,710 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:35:51,711 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:35:51,716 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:35:51,717 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:35:51,717 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:35:51,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:35:51,718 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:35:51,718 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:35:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-21 22:35:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:51,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:51,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:51,773 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-07-21 22:35:51,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:51,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174513448] [2020-07-21 22:35:51,789 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 [2020-07-21 22:35:51,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:51,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:51,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174513448] [2020-07-21 22:35:51,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:51,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:51,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461359602] [2020-07-21 22:35:51,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:51,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:51,982 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-07-21 22:35:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:52,063 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-07-21 22:35:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:52,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:52,080 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:35:52,080 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:35:52,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:35:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-21 22:35:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:35:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-07-21 22:35:52,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-07-21 22:35:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:52,137 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-07-21 22:35:52,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-07-21 22:35:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:52,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:52,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:52,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:52,356 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-07-21 22:35:52,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:52,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432070971] [2020-07-21 22:35:52,359 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 [2020-07-21 22:35:52,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:52,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:52,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432070971] [2020-07-21 22:35:52,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:52,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:52,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44043884] [2020-07-21 22:35:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:52,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:52,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:52,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:52,438 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-07-21 22:35:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:52,470 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-07-21 22:35:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:52,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:52,473 INFO L225 Difference]: With dead ends: 107 [2020-07-21 22:35:52,474 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 22:35:52,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 22:35:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-21 22:35:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 22:35:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-07-21 22:35:52,488 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-07-21 22:35:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:52,489 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-07-21 22:35:52,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-07-21 22:35:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:35:52,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:52,490 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] [2020-07-21 22:35:52,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:52,705 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-07-21 22:35:52,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:52,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260076826] [2020-07-21 22:35:52,708 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 [2020-07-21 22:35:52,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:52,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:52,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260076826] [2020-07-21 22:35:52,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:52,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:52,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801343687] [2020-07-21 22:35:52,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:52,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:52,791 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-07-21 22:35:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:52,817 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-07-21 22:35:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:52,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 22:35:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:52,820 INFO L225 Difference]: With dead ends: 99 [2020-07-21 22:35:52,820 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 22:35:52,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 22:35:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-07-21 22:35:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 22:35:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-07-21 22:35:52,831 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-07-21 22:35:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:52,832 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-07-21 22:35:52,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-07-21 22:35:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:35:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:52,834 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] [2020-07-21 22:35:53,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:53,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-07-21 22:35:53,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:53,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607956186] [2020-07-21 22:35:53,053 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 [2020-07-21 22:35:53,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:53,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:53,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:53,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607956186] [2020-07-21 22:35:53,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:53,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:53,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893908388] [2020-07-21 22:35:53,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:53,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,154 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-07-21 22:35:53,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:53,183 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-07-21 22:35:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:53,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 22:35:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:53,189 INFO L225 Difference]: With dead ends: 124 [2020-07-21 22:35:53,189 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:35:53,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:35:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-07-21 22:35:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 22:35:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-07-21 22:35:53,204 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-07-21 22:35:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:53,204 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-07-21 22:35:53,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-07-21 22:35:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:35:53,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:53,206 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] [2020-07-21 22:35:53,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:53,421 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-07-21 22:35:53,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:53,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861932313] [2020-07-21 22:35:53,424 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 [2020-07-21 22:35:53,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:53,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:53,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:53,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861932313] [2020-07-21 22:35:53,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:53,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:53,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169411302] [2020-07-21 22:35:53,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:53,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,500 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-07-21 22:35:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:53,525 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-07-21 22:35:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:53,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 22:35:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:53,527 INFO L225 Difference]: With dead ends: 204 [2020-07-21 22:35:53,527 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 22:35:53,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 22:35:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-07-21 22:35:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 22:35:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-07-21 22:35:53,541 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-07-21 22:35:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:53,541 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-07-21 22:35:53,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-07-21 22:35:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:53,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:53,543 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] [2020-07-21 22:35:53,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:53,757 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-07-21 22:35:53,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:53,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486662668] [2020-07-21 22:35:53,760 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:53,809 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:53,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:53,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486662668] [2020-07-21 22:35:53,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:53,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:53,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986454332] [2020-07-21 22:35:53,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:53,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,828 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-07-21 22:35:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:53,844 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-07-21 22:35:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:53,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:53,847 INFO L225 Difference]: With dead ends: 183 [2020-07-21 22:35:53,847 INFO L226 Difference]: Without dead ends: 126 [2020-07-21 22:35:53,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-21 22:35:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-07-21 22:35:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 22:35:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-07-21 22:35:53,859 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-07-21 22:35:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:53,859 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-07-21 22:35:53,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-07-21 22:35:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:53,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:53,861 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] [2020-07-21 22:35:54,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,077 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-07-21 22:35:54,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:54,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204863133] [2020-07-21 22:35:54,080 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:54,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:54,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:54,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204863133] [2020-07-21 22:35:54,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:54,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:54,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676101684] [2020-07-21 22:35:54,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:54,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:54,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,138 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-07-21 22:35:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:54,165 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-07-21 22:35:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:54,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:54,169 INFO L225 Difference]: With dead ends: 228 [2020-07-21 22:35:54,169 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 22:35:54,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 22:35:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-07-21 22:35:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 22:35:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-07-21 22:35:54,198 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-07-21 22:35:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:54,198 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-07-21 22:35:54,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-07-21 22:35:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:54,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:54,204 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] [2020-07-21 22:35:54,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,405 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-07-21 22:35:54,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:54,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341499206] [2020-07-21 22:35:54,407 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:54,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:54,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341499206] [2020-07-21 22:35:54,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:54,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:54,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119380237] [2020-07-21 22:35:54,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:54,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,477 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-07-21 22:35:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:54,503 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-07-21 22:35:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:54,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:54,506 INFO L225 Difference]: With dead ends: 392 [2020-07-21 22:35:54,506 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 22:35:54,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 22:35:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-07-21 22:35:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 22:35:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-07-21 22:35:54,522 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-07-21 22:35:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-07-21 22:35:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-07-21 22:35:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:54,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:54,524 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] [2020-07-21 22:35:54,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,742 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:54,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:54,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-07-21 22:35:54,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:54,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6465059] [2020-07-21 22:35:54,744 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:54,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:54,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:54,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:54,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:54,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6465059] [2020-07-21 22:35:54,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:54,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:54,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701077050] [2020-07-21 22:35:54,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:54,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:54,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,801 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-07-21 22:35:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:54,819 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-07-21 22:35:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:54,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:54,821 INFO L225 Difference]: With dead ends: 348 [2020-07-21 22:35:54,822 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 22:35:54,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 22:35:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-07-21 22:35:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-07-21 22:35:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-07-21 22:35:54,835 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-07-21 22:35:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:54,835 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-07-21 22:35:54,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-07-21 22:35:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:54,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:54,837 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] [2020-07-21 22:35:55,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,053 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-07-21 22:35:55,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:55,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897535121] [2020-07-21 22:35:55,055 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:55,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:55,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:55,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897535121] [2020-07-21 22:35:55,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:55,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:55,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771985689] [2020-07-21 22:35:55,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:55,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,107 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-07-21 22:35:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:55,144 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-07-21 22:35:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:55,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:55,148 INFO L225 Difference]: With dead ends: 428 [2020-07-21 22:35:55,148 INFO L226 Difference]: Without dead ends: 426 [2020-07-21 22:35:55,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-07-21 22:35:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-07-21 22:35:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-21 22:35:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-07-21 22:35:55,164 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-07-21 22:35:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:55,166 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-07-21 22:35:55,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-07-21 22:35:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:55,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:55,171 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] [2020-07-21 22:35:55,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,374 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-07-21 22:35:55,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:55,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927293610] [2020-07-21 22:35:55,376 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:55,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:55,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927293610] [2020-07-21 22:35:55,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:55,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:55,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467236584] [2020-07-21 22:35:55,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:55,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:55,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,441 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-07-21 22:35:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:55,485 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-07-21 22:35:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:55,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:55,490 INFO L225 Difference]: With dead ends: 764 [2020-07-21 22:35:55,491 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 22:35:55,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 22:35:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-07-21 22:35:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-21 22:35:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-07-21 22:35:55,520 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-07-21 22:35:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:55,521 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-07-21 22:35:55,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-07-21 22:35:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:55,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:55,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:55,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,737 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-07-21 22:35:55,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:55,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141906538] [2020-07-21 22:35:55,739 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:55,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:55,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:55,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:55,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:55,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141906538] [2020-07-21 22:35:55,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:55,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:55,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359103018] [2020-07-21 22:35:55,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:55,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,812 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-07-21 22:35:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:55,835 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-07-21 22:35:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:55,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:55,839 INFO L225 Difference]: With dead ends: 672 [2020-07-21 22:35:55,839 INFO L226 Difference]: Without dead ends: 458 [2020-07-21 22:35:55,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-07-21 22:35:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-07-21 22:35:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-21 22:35:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-07-21 22:35:55,857 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-07-21 22:35:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:55,868 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-07-21 22:35:55,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-07-21 22:35:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:55,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:55,870 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] [2020-07-21 22:35:56,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,082 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-07-21 22:35:56,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:56,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671952085] [2020-07-21 22:35:56,084 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:56,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:56,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:56,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:56,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671952085] [2020-07-21 22:35:56,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:56,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:56,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753616591] [2020-07-21 22:35:56,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:56,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,135 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-07-21 22:35:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:56,164 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-07-21 22:35:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:56,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:56,170 INFO L225 Difference]: With dead ends: 812 [2020-07-21 22:35:56,171 INFO L226 Difference]: Without dead ends: 810 [2020-07-21 22:35:56,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-07-21 22:35:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-07-21 22:35:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-07-21 22:35:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-07-21 22:35:56,194 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-07-21 22:35:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:56,194 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-07-21 22:35:56,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-07-21 22:35:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:56,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:56,197 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] [2020-07-21 22:35:56,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,413 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-07-21 22:35:56,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:56,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058135625] [2020-07-21 22:35:56,415 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:56,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:56,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:56,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058135625] [2020-07-21 22:35:56,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:56,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:56,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160027056] [2020-07-21 22:35:56,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:56,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,493 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-07-21 22:35:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:56,531 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-07-21 22:35:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:56,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:56,540 INFO L225 Difference]: With dead ends: 1500 [2020-07-21 22:35:56,540 INFO L226 Difference]: Without dead ends: 874 [2020-07-21 22:35:56,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-07-21 22:35:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-07-21 22:35:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-07-21 22:35:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-07-21 22:35:56,584 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-07-21 22:35:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:56,585 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-07-21 22:35:56,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-07-21 22:35:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:56,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:56,588 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] [2020-07-21 22:35:56,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,802 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-07-21 22:35:56,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:56,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880984007] [2020-07-21 22:35:56,803 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:56,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:56,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:56,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880984007] [2020-07-21 22:35:56,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:56,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:56,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88320229] [2020-07-21 22:35:56,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:56,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,878 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-07-21 22:35:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:56,912 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-07-21 22:35:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:56,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:56,918 INFO L225 Difference]: With dead ends: 1308 [2020-07-21 22:35:56,918 INFO L226 Difference]: Without dead ends: 890 [2020-07-21 22:35:56,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-07-21 22:35:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-07-21 22:35:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-07-21 22:35:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-07-21 22:35:56,953 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-07-21 22:35:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:56,954 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-07-21 22:35:56,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-07-21 22:35:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:56,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:56,956 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] [2020-07-21 22:35:57,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,172 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-07-21 22:35:57,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:57,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630206992] [2020-07-21 22:35:57,173 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:57,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:57,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630206992] [2020-07-21 22:35:57,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:57,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:57,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195080286] [2020-07-21 22:35:57,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:57,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:57,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:57,229 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-07-21 22:35:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:57,262 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-07-21 22:35:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:57,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:57,272 INFO L225 Difference]: With dead ends: 1548 [2020-07-21 22:35:57,272 INFO L226 Difference]: Without dead ends: 1546 [2020-07-21 22:35:57,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-21 22:35:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-07-21 22:35:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-07-21 22:35:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-07-21 22:35:57,323 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-07-21 22:35:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:57,324 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-07-21 22:35:57,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-07-21 22:35:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:57,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:57,328 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] [2020-07-21 22:35:57,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,543 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-07-21 22:35:57,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:57,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327978209] [2020-07-21 22:35:57,544 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:57,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:57,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:57,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327978209] [2020-07-21 22:35:57,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:57,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:57,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370625028] [2020-07-21 22:35:57,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:57,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:57,597 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-07-21 22:35:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:57,641 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-07-21 22:35:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:57,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:57,651 INFO L225 Difference]: With dead ends: 2956 [2020-07-21 22:35:57,651 INFO L226 Difference]: Without dead ends: 1706 [2020-07-21 22:35:57,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-07-21 22:35:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-07-21 22:35:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-07-21 22:35:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-07-21 22:35:57,735 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-07-21 22:35:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:57,736 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-07-21 22:35:57,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-07-21 22:35:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:57,740 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] [2020-07-21 22:35:57,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,955 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:57,956 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-07-21 22:35:57,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:57,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955501066] [2020-07-21 22:35:57,958 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:57,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:58,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:58,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955501066] [2020-07-21 22:35:58,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:58,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:58,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632246739] [2020-07-21 22:35:58,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:58,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:58,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,005 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-07-21 22:35:58,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:58,056 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-07-21 22:35:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:58,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:58,067 INFO L225 Difference]: With dead ends: 2556 [2020-07-21 22:35:58,067 INFO L226 Difference]: Without dead ends: 1738 [2020-07-21 22:35:58,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-21 22:35:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-07-21 22:35:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-07-21 22:35:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-07-21 22:35:58,129 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-07-21 22:35:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:58,130 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-07-21 22:35:58,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-07-21 22:35:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:58,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:58,133 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] [2020-07-21 22:35:58,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:58,349 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:58,350 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-07-21 22:35:58,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:58,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684770095] [2020-07-21 22:35:58,351 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:58,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:58,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:58,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684770095] [2020-07-21 22:35:58,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:58,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:58,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585495224] [2020-07-21 22:35:58,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:58,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,401 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-07-21 22:35:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:58,457 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-07-21 22:35:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:58,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:58,473 INFO L225 Difference]: With dead ends: 2956 [2020-07-21 22:35:58,473 INFO L226 Difference]: Without dead ends: 2954 [2020-07-21 22:35:58,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-21 22:35:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-07-21 22:35:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-07-21 22:35:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-07-21 22:35:58,559 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-07-21 22:35:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:58,560 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-07-21 22:35:58,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-07-21 22:35:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:58,565 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] [2020-07-21 22:35:58,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:58,778 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:58,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-07-21 22:35:58,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:58,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745527917] [2020-07-21 22:35:58,779 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:58,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:58,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:58,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:58,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745527917] [2020-07-21 22:35:58,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:58,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:58,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481301753] [2020-07-21 22:35:58,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:58,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,824 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-07-21 22:35:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:58,930 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-07-21 22:35:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:58,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:58,947 INFO L225 Difference]: With dead ends: 5836 [2020-07-21 22:35:58,947 INFO L226 Difference]: Without dead ends: 3338 [2020-07-21 22:35:58,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-21 22:35:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-07-21 22:35:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-07-21 22:35:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-07-21 22:35:59,048 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-07-21 22:35:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:59,048 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-07-21 22:35:59,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-07-21 22:35:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:35:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:59,053 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] [2020-07-21 22:35:59,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:59,269 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-07-21 22:35:59,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:59,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439212091] [2020-07-21 22:35:59,270 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:59,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:59,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:59,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439212091] [2020-07-21 22:35:59,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:59,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:59,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561371063] [2020-07-21 22:35:59,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:59,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:59,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:59,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:59,316 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-07-21 22:35:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:59,372 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-07-21 22:35:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:59,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:35:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:59,390 INFO L225 Difference]: With dead ends: 5004 [2020-07-21 22:35:59,390 INFO L226 Difference]: Without dead ends: 3402 [2020-07-21 22:35:59,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-07-21 22:35:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-07-21 22:35:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-07-21 22:35:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-07-21 22:35:59,485 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-07-21 22:35:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:59,486 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-07-21 22:35:59,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-07-21 22:35:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:35:59,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:59,491 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] [2020-07-21 22:35:59,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:59,706 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-07-21 22:35:59,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:59,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19543811] [2020-07-21 22:35:59,707 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:59,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:59,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:59,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19543811] [2020-07-21 22:35:59,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:59,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:59,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840401401] [2020-07-21 22:35:59,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:59,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:59,751 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-07-21 22:35:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:59,861 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-07-21 22:35:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:59,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:35:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:59,909 INFO L225 Difference]: With dead ends: 9804 [2020-07-21 22:35:59,910 INFO L226 Difference]: Without dead ends: 6538 [2020-07-21 22:35:59,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-07-21 22:36:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-07-21 22:36:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-07-21 22:36:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-07-21 22:36:00,154 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-07-21 22:36:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:00,155 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-07-21 22:36:00,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:36:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-07-21 22:36:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:36:00,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:00,165 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] [2020-07-21 22:36:00,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:00,379 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-07-21 22:36:00,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:00,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384505153] [2020-07-21 22:36:00,380 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:00,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:00,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:36:00,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:36:00,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:36:00,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384505153] [2020-07-21 22:36:00,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:36:00,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:36:00,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41729688] [2020-07-21 22:36:00,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:36:00,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:36:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:00,436 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-07-21 22:36:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:00,555 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-07-21 22:36:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:36:00,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:36:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:00,590 INFO L225 Difference]: With dead ends: 7052 [2020-07-21 22:36:00,590 INFO L226 Difference]: Without dead ends: 7050 [2020-07-21 22:36:00,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-07-21 22:36:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-07-21 22:36:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-07-21 22:36:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-07-21 22:36:00,848 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-07-21 22:36:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:00,848 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-07-21 22:36:00,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:36:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-07-21 22:36:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:36:00,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:00,860 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] [2020-07-21 22:36:01,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:01,067 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-07-21 22:36:01,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:01,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002847487] [2020-07-21 22:36:01,069 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:01,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:36:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:36:01,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:36:01,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002847487] [2020-07-21 22:36:01,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:36:01,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:36:01,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289973333] [2020-07-21 22:36:01,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:36:01,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:36:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:01,115 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-07-21 22:36:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:01,250 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-07-21 22:36:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:36:01,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:36:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:01,279 INFO L225 Difference]: With dead ends: 10634 [2020-07-21 22:36:01,280 INFO L226 Difference]: Without dead ends: 10632 [2020-07-21 22:36:01,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-07-21 22:36:01,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-07-21 22:36:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-07-21 22:36:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-07-21 22:36:01,502 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-07-21 22:36:01,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:01,502 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-07-21 22:36:01,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:36:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-07-21 22:36:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:36:01,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:36:01,520 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] [2020-07-21 22:36:01,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:01,736 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:36:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:36:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-07-21 22:36:01,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:36:01,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622430934] [2020-07-21 22:36:01,737 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:01,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:36:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:36:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:36:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:36:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:36:01,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:36:01,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622430934] [2020-07-21 22:36:01,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:36:01,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:36:01,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793476284] [2020-07-21 22:36:01,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:36:01,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:36:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:36:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:01,796 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-07-21 22:36:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:36:02,015 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-07-21 22:36:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:36:02,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:36:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:36:02,016 INFO L225 Difference]: With dead ends: 22664 [2020-07-21 22:36:02,016 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:36:02,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:36:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:36:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:36:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:36:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:36:02,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-21 22:36:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:36:02,062 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:36:02,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:36:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:36:02,062 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:36:02,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:36:02,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:36:02,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:36:02,332 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:36:02,332 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-07-21 22:36:02,332 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-07-21 22:36:02,333 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-07-21 22:36:02,334 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-07-21 22:36:02,334 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,334 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 22:36:02,334 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,334 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-07-21 22:36:02,334 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,335 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-07-21 22:36:02,336 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,337 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-07-21 22:36:02,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:36:02 BoogieIcfgContainer [2020-07-21 22:36:02,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:36:02,353 INFO L168 Benchmark]: Toolchain (without parser) took 11558.75 ms. Allocated memory was 144.7 MB in the beginning and 322.4 MB in the end (delta: 177.7 MB). Free memory was 101.2 MB in the beginning and 185.4 MB in the end (delta: -84.2 MB). Peak memory consumption was 93.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,354 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.10 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,355 INFO L168 Benchmark]: Boogie Preprocessor took 147.80 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 179.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,355 INFO L168 Benchmark]: RCFGBuilder took 359.21 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 160.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,356 INFO L168 Benchmark]: TraceAbstraction took 10753.47 ms. Allocated memory was 201.9 MB in the beginning and 322.4 MB in the end (delta: 120.6 MB). Free memory was 160.6 MB in the beginning and 185.4 MB in the end (delta: -24.8 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:36:02,358 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.10 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.80 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 179.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.21 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 160.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10753.47 ms. Allocated memory was 201.9 MB in the beginning and 322.4 MB in the end (delta: 120.6 MB). Free memory was 160.6 MB in the beginning and 185.4 MB in the end (delta: -24.8 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 575 NumberOfCodeBlocks, 572 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2549 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...