/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_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:35:39,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:35:39,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:35:39,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:35:39,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:35:39,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:35:39,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:35:39,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:35:39,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:35:39,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:35:39,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:35:39,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:35:39,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:35:39,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:35:39,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:35:39,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:35:39,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:35:39,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:35:39,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:35:39,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:35:39,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:35:39,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:35:39,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:35:39,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:35:39,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:35:39,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:35:39,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:35:39,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:35:39,840 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 22:35:39,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:35:39,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:35:39,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:35:39,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:35:39,873 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:35:39,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:35:39,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:35:39,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:35:39,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:35:39,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:35:39,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:35:39,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:35:39,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:35:39,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:35:39,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:35:39,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:35:39,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:35:39,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:35:39,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:35:39,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:35:39,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:35:39,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:35:39,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:35:39,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:35:39,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:35:39,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:35:39,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:39,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:35:39,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:35:39,879 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 22:35:40,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:35:40,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:35:40,284 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:35:40,286 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:35:40,286 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:35:40,287 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 22:35:40,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50baf2f58/a77ac3cda3bd4e638edd9a2642803468/FLAG94d4b2168 [2020-07-21 22:35:40,855 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:35:40,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-21 22:35:40,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50baf2f58/a77ac3cda3bd4e638edd9a2642803468/FLAG94d4b2168 [2020-07-21 22:35:41,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50baf2f58/a77ac3cda3bd4e638edd9a2642803468 [2020-07-21 22:35:41,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:35:41,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:35:41,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:41,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:35:41,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:35:41,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5877701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41, skipping insertion in model container [2020-07-21 22:35:41,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:35:41,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:35:41,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:41,490 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:35:41,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:41,544 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:35:41,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41 WrapperNode [2020-07-21 22:35:41,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:41,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:35:41,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:35:41,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:35:41,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (1/1) ... [2020-07-21 22:35:41,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:35:41,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:35:41,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:35:41,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:35:41,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (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 22:35:41,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:35:41,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:35:41,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:35:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:35:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:35:41,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:35:41,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:35:41,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:35:42,040 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:35:42,041 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:35:42,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:42 BoogieIcfgContainer [2020-07-21 22:35:42,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:35:42,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:35:42,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:35:42,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:35:42,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:35:41" (1/3) ... [2020-07-21 22:35:42,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22308bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:42, skipping insertion in model container [2020-07-21 22:35:42,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:41" (2/3) ... [2020-07-21 22:35:42,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22308bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:42, skipping insertion in model container [2020-07-21 22:35:42,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:42" (3/3) ... [2020-07-21 22:35:42,058 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-21 22:35:42,073 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:35:42,085 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:35:42,130 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:35:42,178 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:35:42,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:35:42,178 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:35:42,179 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:35:42,179 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:35:42,179 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:35:42,179 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:35:42,179 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:35:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 22:35:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 22:35:42,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:42,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:42,224 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-21 22:35:42,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:42,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221016777] [2020-07-21 22:35:42,243 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 22:35:42,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:42,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:42,390 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 22:35:42,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:42,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221016777] [2020-07-21 22:35:42,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:42,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:42,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806192065] [2020-07-21 22:35:42,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:42,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:42,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:42,413 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-21 22:35:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:42,473 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-21 22:35:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:42,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 22:35:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:42,492 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:35:42,492 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:35:42,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 22:35:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:35:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-21 22:35:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:35:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-21 22:35:42,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-21 22:35:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:42,542 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-21 22:35:42,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-21 22:35:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 22:35:42,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:42,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:42,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:42,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-21 22:35:42,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:42,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895866137] [2020-07-21 22:35:42,763 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 22:35:42,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:42,823 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 22:35:42,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:42,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895866137] [2020-07-21 22:35:42,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:42,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:42,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139902333] [2020-07-21 22:35:42,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:42,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:42,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:42,828 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-21 22:35:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:42,852 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-21 22:35:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:42,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 22:35:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:42,855 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:35:42,855 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:35:42,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 22:35:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:35:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-21 22:35:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:35:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-21 22:35:42,866 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-21 22:35:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:42,866 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-21 22:35:42,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-21 22:35:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:35:42,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:42,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:43,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:43,083 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-21 22:35:43,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:43,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731494076] [2020-07-21 22:35:43,086 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 22:35:43,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:43,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:43,156 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 22:35:43,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:43,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731494076] [2020-07-21 22:35:43,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:43,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:43,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854274908] [2020-07-21 22:35:43,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:43,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:43,159 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-21 22:35:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:43,179 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 22:35:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:43,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 22:35:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:43,181 INFO L225 Difference]: With dead ends: 63 [2020-07-21 22:35:43,182 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 22:35:43,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 22:35:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 22:35:43,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-21 22:35:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 22:35:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-07-21 22:35:43,191 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-07-21 22:35:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:43,191 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-07-21 22:35:43,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-07-21 22:35:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:35:43,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:43,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:43,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:43,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:43,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-07-21 22:35:43,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:43,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523075633] [2020-07-21 22:35:43,410 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 22:35:43,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:43,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:43,470 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 22:35:43,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:43,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523075633] [2020-07-21 22:35:43,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:43,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:43,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580217942] [2020-07-21 22:35:43,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:43,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:43,473 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-07-21 22:35:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:43,500 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-07-21 22:35:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:43,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 22:35:43,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:43,502 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:35:43,503 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 22:35:43,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 22:35:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 22:35:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-21 22:35:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:35:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-21 22:35:43,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-21 22:35:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:43,514 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-21 22:35:43,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-21 22:35:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:35:43,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:43,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:43,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:43,731 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-21 22:35:43,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:43,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60489949] [2020-07-21 22:35:43,733 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 22:35:43,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:43,794 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 22:35:43,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:43,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60489949] [2020-07-21 22:35:43,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:43,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:43,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823690062] [2020-07-21 22:35:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:43,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:43,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:43,798 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-21 22:35:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:43,832 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-21 22:35:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:43,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 22:35:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:43,834 INFO L225 Difference]: With dead ends: 124 [2020-07-21 22:35:43,834 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 22:35:43,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 22:35:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 22:35:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-21 22:35:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 22:35:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-21 22:35:43,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-21 22:35:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:43,847 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-21 22:35:43,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-21 22:35:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 22:35:43,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:43,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:44,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:44,063 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-21 22:35:44,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:44,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637737779] [2020-07-21 22:35:44,078 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 22:35:44,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:44,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:44,140 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 22:35:44,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:44,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637737779] [2020-07-21 22:35:44,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:44,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:44,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371746961] [2020-07-21 22:35:44,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:44,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:44,143 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-21 22:35:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:44,160 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-07-21 22:35:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:44,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 22:35:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:44,162 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:35:44,162 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:35:44,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:35:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:35:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-21 22:35:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 22:35:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-07-21 22:35:44,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-07-21 22:35:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:44,172 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-07-21 22:35:44,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-07-21 22:35:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 22:35:44,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:44,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:44,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:44,389 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-07-21 22:35:44,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:44,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784223790] [2020-07-21 22:35:44,391 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 22:35:44,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:44,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:44,435 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 22:35:44,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:44,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784223790] [2020-07-21 22:35:44,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:44,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:44,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161805798] [2020-07-21 22:35:44,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:44,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:44,440 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-07-21 22:35:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:44,461 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-07-21 22:35:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:44,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 22:35:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:44,464 INFO L225 Difference]: With dead ends: 132 [2020-07-21 22:35:44,464 INFO L226 Difference]: Without dead ends: 130 [2020-07-21 22:35:44,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:35:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-21 22:35:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-07-21 22:35:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 22:35:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-07-21 22:35:44,477 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-07-21 22:35:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:44,477 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-07-21 22:35:44,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-07-21 22:35:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 22:35:44,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:44,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:44,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:44,693 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:44,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-07-21 22:35:44,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:44,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244932371] [2020-07-21 22:35:44,695 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 22:35:44,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:44,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:44,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:44,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:44,737 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 22:35:44,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:44,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244932371] [2020-07-21 22:35:44,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:44,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:44,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258618571] [2020-07-21 22:35:44,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:44,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:44,740 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-07-21 22:35:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:44,765 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-07-21 22:35:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:44,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 22:35:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:44,767 INFO L225 Difference]: With dead ends: 232 [2020-07-21 22:35:44,767 INFO L226 Difference]: Without dead ends: 138 [2020-07-21 22:35:44,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:35:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-21 22:35:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-21 22:35:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 22:35:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-07-21 22:35:44,782 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-07-21 22:35:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:44,783 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-07-21 22:35:44,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-07-21 22:35:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:35:44,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:44,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:44,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:44,999 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-07-21 22:35:45,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:45,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802853343] [2020-07-21 22:35:45,002 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 22:35:45,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:45,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:45,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:45,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:45,053 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 22:35:45,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:45,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802853343] [2020-07-21 22:35:45,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:45,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:45,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057593294] [2020-07-21 22:35:45,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:45,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:45,057 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-07-21 22:35:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:45,074 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-07-21 22:35:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:45,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 22:35:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:45,076 INFO L225 Difference]: With dead ends: 204 [2020-07-21 22:35:45,077 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 22:35:45,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:35:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 22:35:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-07-21 22:35:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 22:35:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-07-21 22:35:45,088 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-07-21 22:35:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:45,089 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-07-21 22:35:45,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-07-21 22:35:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:35:45,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:45,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:45,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:45,300 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-07-21 22:35:45,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:45,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309175267] [2020-07-21 22:35:45,302 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 22:35:45,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:45,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:45,346 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 22:35:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:45,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309175267] [2020-07-21 22:35:45,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:45,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:45,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907219731] [2020-07-21 22:35:45,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:45,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:45,349 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-07-21 22:35:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:45,382 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-07-21 22:35:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:45,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 22:35:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:45,388 INFO L225 Difference]: With dead ends: 236 [2020-07-21 22:35:45,388 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 22:35:45,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:35:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 22:35:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-07-21 22:35:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 22:35:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-07-21 22:35:45,417 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-07-21 22:35:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:45,418 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-07-21 22:35:45,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-07-21 22:35:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:35:45,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:45,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:45,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:45,630 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-07-21 22:35:45,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:45,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963313285] [2020-07-21 22:35:45,632 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 22:35:45,662 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:45,692 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 22:35:45,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:45,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963313285] [2020-07-21 22:35:45,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:45,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:45,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346841885] [2020-07-21 22:35:45,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:45,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:45,695 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-07-21 22:35:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:45,735 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-07-21 22:35:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:45,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 22:35:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:45,739 INFO L225 Difference]: With dead ends: 444 [2020-07-21 22:35:45,739 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 22:35:45,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:35:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 22:35:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-21 22:35:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-21 22:35:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-07-21 22:35:45,773 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-07-21 22:35:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:45,774 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-07-21 22:35:45,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-07-21 22:35:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:45,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:45,777 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 22:35:45,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:45,992 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-07-21 22:35:45,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:45,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014637671] [2020-07-21 22:35:45,994 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 22:35:46,031 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:46,042 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 22:35:46,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:46,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014637671] [2020-07-21 22:35:46,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:46,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:46,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632586637] [2020-07-21 22:35:46,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:46,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:46,044 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-07-21 22:35:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:46,069 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-07-21 22:35:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:46,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:46,072 INFO L225 Difference]: With dead ends: 384 [2020-07-21 22:35:46,072 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 22:35:46,073 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 22:35:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 22:35:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-07-21 22:35:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-21 22:35:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-07-21 22:35:46,092 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-07-21 22:35:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:46,093 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-07-21 22:35:46,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-07-21 22:35:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:46,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:46,095 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 22:35:46,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:46,310 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-07-21 22:35:46,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:46,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546303932] [2020-07-21 22:35:46,312 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 22:35:46,341 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:46,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:46,356 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 22:35:46,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:46,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546303932] [2020-07-21 22:35:46,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:46,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:46,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602443132] [2020-07-21 22:35:46,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:46,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:46,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:46,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:46,359 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-07-21 22:35:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:46,380 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-07-21 22:35:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:46,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:46,383 INFO L225 Difference]: With dead ends: 426 [2020-07-21 22:35:46,384 INFO L226 Difference]: Without dead ends: 424 [2020-07-21 22:35:46,384 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 22:35:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-07-21 22:35:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-07-21 22:35:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-21 22:35:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-07-21 22:35:46,401 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-07-21 22:35:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:46,402 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-07-21 22:35:46,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-07-21 22:35:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:35:46,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:46,404 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 22:35:46,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:46,621 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-07-21 22:35:46,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:46,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232269950] [2020-07-21 22:35:46,623 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 22:35:46,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:46,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:46,665 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 22:35:46,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:46,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232269950] [2020-07-21 22:35:46,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:46,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:46,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687485645] [2020-07-21 22:35:46,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:46,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:46,669 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-07-21 22:35:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:46,716 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-07-21 22:35:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:46,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 22:35:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:46,718 INFO L225 Difference]: With dead ends: 856 [2020-07-21 22:35:46,718 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:35:46,720 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 22:35:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:35:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:35:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:35:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:35:46,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-21 22:35:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:46,722 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:35:46,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:35:46,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:35:46,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:46,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:35:46,984 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:35:46,984 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:46,984 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:46,984 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:35:46,984 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:35:46,985 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:35:46,985 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-21 22:35:46,985 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-21 22:35:46,985 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,986 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-21 22:35:46,987 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-21 22:35:46,988 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:46,988 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-21 22:35:46,988 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 22:35:46,988 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-21 22:35:46,988 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-21 22:35:46,988 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-21 22:35:47,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:35:47 BoogieIcfgContainer [2020-07-21 22:35:47,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:35:47,009 INFO L168 Benchmark]: Toolchain (without parser) took 5785.41 ms. Allocated memory was 147.8 MB in the beginning and 242.2 MB in the end (delta: 94.4 MB). Free memory was 105.9 MB in the beginning and 208.3 MB in the end (delta: -102.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 22:35:47,017 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 124.0 MB in the beginning and 123.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 22:35:47,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.99 ms. Allocated memory is still 147.8 MB. Free memory was 105.5 MB in the beginning and 95.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:47,019 INFO L168 Benchmark]: Boogie Preprocessor took 196.65 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 182.3 MB in the end (delta: -86.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:47,022 INFO L168 Benchmark]: RCFGBuilder took 302.67 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 166.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:47,023 INFO L168 Benchmark]: TraceAbstraction took 4958.67 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 166.9 MB in the beginning and 208.3 MB in the end (delta: -41.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 22:35:47,026 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 124.0 MB in the beginning and 123.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.99 ms. Allocated memory is still 147.8 MB. Free memory was 105.5 MB in the beginning and 95.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 196.65 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 182.3 MB in the end (delta: -86.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.67 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 166.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4958.67 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 166.9 MB in the beginning and 208.3 MB in the end (delta: -41.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 240 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 904 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...