/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:10,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:10,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:10,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:10,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:10,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:10,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:10,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:10,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:10,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:10,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:10,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:10,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:10,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:10,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:10,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:10,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:10,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:10,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:10,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:10,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:10,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:10,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:10,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:10,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:50:10,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:10,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:10,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:10,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:50:10,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:10,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:10,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:10,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:10,632 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:10,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:10,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:10,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:10,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:10,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:10,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:10,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:10,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:10,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:10,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:10,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:10,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:10,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:10,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:10,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:10,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:10,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:10,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:10,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:10,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:10,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:10,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:10,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:10,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:10,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:50:10,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:10,937 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:10,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:10,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:10,943 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:10,944 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 13:50:11,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1150ac294/5415a58121ab4533bc7f1f6bb3376a72/FLAGb0ccf6fa7 [2020-07-20 13:50:11,464 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:11,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_5.c [2020-07-20 13:50:11,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1150ac294/5415a58121ab4533bc7f1f6bb3376a72/FLAGb0ccf6fa7 [2020-07-20 13:50:11,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1150ac294/5415a58121ab4533bc7f1f6bb3376a72 [2020-07-20 13:50:11,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:11,794 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:11,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:11,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:11,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:11,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:11" (1/1) ... [2020-07-20 13:50:11,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e89e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:11, skipping insertion in model container [2020-07-20 13:50:11,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:11" (1/1) ... [2020-07-20 13:50:11,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:11,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:12,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:12,016 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:12,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:12,053 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:12,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12 WrapperNode [2020-07-20 13:50:12,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:12,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:12,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:12,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:12,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... [2020-07-20 13:50:12,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:12,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:12,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:12,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:12,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:12,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:12,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:12,494 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 13:50:12,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:12 BoogieIcfgContainer [2020-07-20 13:50:12,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:12,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:12,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:12,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:12,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:11" (1/3) ... [2020-07-20 13:50:12,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5f4cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:12, skipping insertion in model container [2020-07-20 13:50:12,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:12" (2/3) ... [2020-07-20 13:50:12,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5f4cd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:12, skipping insertion in model container [2020-07-20 13:50:12,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:12" (3/3) ... [2020-07-20 13:50:12,507 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-07-20 13:50:12,519 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:12,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:12,544 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:12,618 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:12,618 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:12,618 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:12,618 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:12,619 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:12,619 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:12,619 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:12,621 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 13:50:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:50:12,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:12,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:12,673 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-07-20 13:50:12,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:12,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244781118] [2020-07-20 13:50:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:12,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:12,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:12,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:12,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:12,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244781118] [2020-07-20 13:50:12,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:12,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:12,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116183835] [2020-07-20 13:50:12,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:12,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:12,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:12,873 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-07-20 13:50:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:12,933 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-07-20 13:50:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:12,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 13:50:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:12,947 INFO L225 Difference]: With dead ends: 57 [2020-07-20 13:50:12,947 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:50:12,951 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 [2020-07-20 13:50:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:50:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-20 13:50:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:50:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-07-20 13:50:12,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-07-20 13:50:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:12,992 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-07-20 13:50:12,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-07-20 13:50:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:50:12,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:12,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:13,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,208 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-07-20 13:50:13,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:13,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922011935] [2020-07-20 13:50:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,253 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:13,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:13,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:13,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922011935] [2020-07-20 13:50:13,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:13,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:13,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732874607] [2020-07-20 13:50:13,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:13,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:13,279 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-07-20 13:50:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:13,313 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-07-20 13:50:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:13,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 13:50:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:13,315 INFO L225 Difference]: With dead ends: 67 [2020-07-20 13:50:13,315 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:50:13,317 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 [2020-07-20 13:50:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:50:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-20 13:50:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 13:50:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-07-20 13:50:13,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-07-20 13:50:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:13,326 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-07-20 13:50:13,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-07-20 13:50:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:50:13,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:13,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:13,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,542 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-07-20 13:50:13,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:13,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627707790] [2020-07-20 13:50:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:13,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:13,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627707790] [2020-07-20 13:50:13,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:13,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:13,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486358962] [2020-07-20 13:50:13,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:13,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:13,614 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-07-20 13:50:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:13,635 INFO L93 Difference]: Finished difference Result 73 states and 119 transitions. [2020-07-20 13:50:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:13,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 13:50:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:13,638 INFO L225 Difference]: With dead ends: 73 [2020-07-20 13:50:13,638 INFO L226 Difference]: Without dead ends: 71 [2020-07-20 13:50:13,639 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 [2020-07-20 13:50:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-20 13:50:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-07-20 13:50:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 13:50:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 87 transitions. [2020-07-20 13:50:13,652 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 87 transitions. Word has length 16 [2020-07-20 13:50:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:13,652 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 87 transitions. [2020-07-20 13:50:13,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 87 transitions. [2020-07-20 13:50:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:50:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:13,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:13,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 407111640, now seen corresponding path program 1 times [2020-07-20 13:50:13,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:13,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992465916] [2020-07-20 13:50:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:13,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:13,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:13,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992465916] [2020-07-20 13:50:13,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:13,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:13,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432301966] [2020-07-20 13:50:13,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:13,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:13,937 INFO L87 Difference]: Start difference. First operand 53 states and 87 transitions. Second operand 3 states. [2020-07-20 13:50:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:13,957 INFO L93 Difference]: Finished difference Result 82 states and 131 transitions. [2020-07-20 13:50:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:13,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 13:50:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:13,959 INFO L225 Difference]: With dead ends: 82 [2020-07-20 13:50:13,960 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 13:50:13,960 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 [2020-07-20 13:50:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 13:50:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-07-20 13:50:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:50:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-07-20 13:50:13,969 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-07-20 13:50:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:13,970 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-07-20 13:50:13,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-07-20 13:50:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:50:13,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:13,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:14,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:14,187 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-07-20 13:50:14,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:14,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404030479] [2020-07-20 13:50:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:14,228 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:14,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:14,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:14,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404030479] [2020-07-20 13:50:14,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:14,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:14,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867504676] [2020-07-20 13:50:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:14,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:14,244 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-07-20 13:50:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:14,264 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-07-20 13:50:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:14,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 13:50:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:14,266 INFO L225 Difference]: With dead ends: 124 [2020-07-20 13:50:14,266 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 13:50:14,267 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 [2020-07-20 13:50:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 13:50:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-07-20 13:50:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 13:50:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-07-20 13:50:14,278 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-07-20 13:50:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:14,278 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-07-20 13:50:14,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-07-20 13:50:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:50:14,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:14,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:14,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:14,496 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-07-20 13:50:14,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:14,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345299804] [2020-07-20 13:50:14,500 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 [2020-07-20 13:50:14,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:14,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:14,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:14,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345299804] [2020-07-20 13:50:14,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:14,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:14,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217315593] [2020-07-20 13:50:14,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:14,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:14,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:14,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:14,546 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-07-20 13:50:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:14,570 INFO L93 Difference]: Finished difference Result 130 states and 202 transitions. [2020-07-20 13:50:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:14,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 13:50:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:14,575 INFO L225 Difference]: With dead ends: 130 [2020-07-20 13:50:14,575 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 13:50:14,576 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 [2020-07-20 13:50:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 13:50:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-07-20 13:50:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 13:50:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 156 transitions. [2020-07-20 13:50:14,608 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 156 transitions. Word has length 17 [2020-07-20 13:50:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:14,609 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 156 transitions. [2020-07-20 13:50:14,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 156 transitions. [2020-07-20 13:50:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:50:14,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:14,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:14,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:14,825 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2146657713, now seen corresponding path program 1 times [2020-07-20 13:50:14,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:14,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884107088] [2020-07-20 13:50:14,826 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 [2020-07-20 13:50:14,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:14,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:14,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884107088] [2020-07-20 13:50:14,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:14,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430250989] [2020-07-20 13:50:14,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:14,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:14,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:14,864 INFO L87 Difference]: Start difference. First operand 102 states and 156 transitions. Second operand 3 states. [2020-07-20 13:50:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:14,882 INFO L93 Difference]: Finished difference Result 230 states and 354 transitions. [2020-07-20 13:50:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:14,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 13:50:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:14,885 INFO L225 Difference]: With dead ends: 230 [2020-07-20 13:50:14,885 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 13:50:14,886 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 [2020-07-20 13:50:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 13:50:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-20 13:50:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 13:50:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 198 transitions. [2020-07-20 13:50:14,902 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 198 transitions. Word has length 17 [2020-07-20 13:50:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:14,902 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 198 transitions. [2020-07-20 13:50:14,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 198 transitions. [2020-07-20 13:50:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 13:50:14,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:14,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:15,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:15,115 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1493244945, now seen corresponding path program 1 times [2020-07-20 13:50:15,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:15,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338167348] [2020-07-20 13:50:15,117 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 [2020-07-20 13:50:15,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:15,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:15,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:15,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338167348] [2020-07-20 13:50:15,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:15,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:15,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375601958] [2020-07-20 13:50:15,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:15,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:15,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:15,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:15,173 INFO L87 Difference]: Start difference. First operand 134 states and 198 transitions. Second operand 3 states. [2020-07-20 13:50:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:15,205 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2020-07-20 13:50:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:15,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 13:50:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:15,208 INFO L225 Difference]: With dead ends: 230 [2020-07-20 13:50:15,208 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 13:50:15,209 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 [2020-07-20 13:50:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 13:50:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 194. [2020-07-20 13:50:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-20 13:50:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 282 transitions. [2020-07-20 13:50:15,227 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 282 transitions. Word has length 18 [2020-07-20 13:50:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:15,227 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 282 transitions. [2020-07-20 13:50:15,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 282 transitions. [2020-07-20 13:50:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 13:50:15,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:15,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:15,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:15,446 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash 683898319, now seen corresponding path program 1 times [2020-07-20 13:50:15,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:15,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116191198] [2020-07-20 13:50:15,449 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 [2020-07-20 13:50:15,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:15,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:15,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:15,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116191198] [2020-07-20 13:50:15,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:15,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:15,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619632338] [2020-07-20 13:50:15,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:15,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:15,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:15,499 INFO L87 Difference]: Start difference. First operand 194 states and 282 transitions. Second operand 3 states. [2020-07-20 13:50:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:15,531 INFO L93 Difference]: Finished difference Result 438 states and 636 transitions. [2020-07-20 13:50:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:15,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 13:50:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:15,534 INFO L225 Difference]: With dead ends: 438 [2020-07-20 13:50:15,534 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 13:50:15,538 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 [2020-07-20 13:50:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 13:50:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2020-07-20 13:50:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-20 13:50:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 346 transitions. [2020-07-20 13:50:15,559 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 346 transitions. Word has length 18 [2020-07-20 13:50:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:15,560 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 346 transitions. [2020-07-20 13:50:15,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 346 transitions. [2020-07-20 13:50:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:15,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:15,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:15,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:15,774 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash -953830938, now seen corresponding path program 1 times [2020-07-20 13:50:15,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:15,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339708408] [2020-07-20 13:50:15,777 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 [2020-07-20 13:50:15,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:50:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:15,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:15,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339708408] [2020-07-20 13:50:15,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:15,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:15,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921433960] [2020-07-20 13:50:15,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:15,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:15,821 INFO L87 Difference]: Start difference. First operand 250 states and 346 transitions. Second operand 3 states. [2020-07-20 13:50:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:15,843 INFO L93 Difference]: Finished difference Result 412 states and 563 transitions. [2020-07-20 13:50:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:15,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 13:50:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:15,846 INFO L225 Difference]: With dead ends: 412 [2020-07-20 13:50:15,846 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 13:50:15,847 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 [2020-07-20 13:50:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 13:50:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 378. [2020-07-20 13:50:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-07-20 13:50:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2020-07-20 13:50:15,866 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 19 [2020-07-20 13:50:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:15,866 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2020-07-20 13:50:15,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2020-07-20 13:50:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:50:15,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:15,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:16,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:16,084 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1763177564, now seen corresponding path program 1 times [2020-07-20 13:50:16,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:16,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428306109] [2020-07-20 13:50:16,086 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 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 [2020-07-20 13:50:16,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:50:16,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:16,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428306109] [2020-07-20 13:50:16,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:16,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:16,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522940022] [2020-07-20 13:50:16,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:16,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:16,155 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand 3 states. [2020-07-20 13:50:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:16,191 INFO L93 Difference]: Finished difference Result 842 states and 1138 transitions. [2020-07-20 13:50:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:16,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 13:50:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:16,193 INFO L225 Difference]: With dead ends: 842 [2020-07-20 13:50:16,193 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:50:16,196 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 [2020-07-20 13:50:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:50:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:50:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:50:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:50:16,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-20 13:50:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:16,197 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:50:16,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:50:16,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:50:16,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:16,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:50:16,464 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:50:16,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:50:16,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:50:16,465 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:50:16,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:50:16,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:50:16,465 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-07-20 13:50:16,466 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-07-20 13:50:16,466 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-07-20 13:50:16,466 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,466 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-07-20 13:50:16,466 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,466 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,467 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,467 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,467 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,467 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-20 13:50:16,467 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-20 13:50:16,468 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,468 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-07-20 13:50:16,468 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-07-20 13:50:16,468 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-07-20 13:50:16,469 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-07-20 13:50:16,470 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,470 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-07-20 13:50:16,470 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-20 13:50:16,470 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-07-20 13:50:16,470 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-07-20 13:50:16,470 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-07-20 13:50:16,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:50:16 BoogieIcfgContainer [2020-07-20 13:50:16,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:50:16,487 INFO L168 Benchmark]: Toolchain (without parser) took 4693.56 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 102.8 MB in the beginning and 129.3 MB in the end (delta: -26.5 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,488 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.04 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 92.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,489 INFO L168 Benchmark]: Boogie Preprocessor took 36.03 ms. Allocated memory is still 137.4 MB. Free memory was 92.4 MB in the beginning and 90.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,490 INFO L168 Benchmark]: RCFGBuilder took 406.83 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.8 MB in the beginning and 166.2 MB in the end (delta: -75.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,491 INFO L168 Benchmark]: TraceAbstraction took 3985.22 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 166.2 MB in the beginning and 129.3 MB in the end (delta: 36.9 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:16,495 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.04 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 92.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.03 ms. Allocated memory is still 137.4 MB. Free memory was 92.4 MB in the beginning and 90.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.83 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.8 MB in the beginning and 166.2 MB in the end (delta: -75.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3985.22 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 166.2 MB in the beginning and 129.3 MB in the end (delta: 36.9 MB). Peak memory consumption was 67.8 MB. 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: 3.7s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 507 SDtfs, 216 SDslu, 341 SDs, 0 SdLazy, 60 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=10, 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, 11 MinimizatonAttempts, 132 StatesRemovedByMinimization, 10 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, 186 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 4790 SizeOfPredicates, 0 NumberOfNonLiveVariables, 653 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...