/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:49:43,130 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:49:43,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:49:43,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:49:43,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:49:43,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:49:43,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:49:43,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:49:43,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:49:43,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:49:43,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:49:43,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:49:43,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:49:43,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:49:43,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:49:43,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:49:43,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:49:43,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:49:43,189 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 21:49:43,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:49:43,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:49:43,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:49:43,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:49:43,207 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:49:43,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:49:43,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:49:43,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:49:43,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:49:43,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:49:43,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:49:43,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:49:43,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:49:43,209 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:49:43,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:49:43,209 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:49:43,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:49:43,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:49:43,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:49:43,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:49:43,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:49:43,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:43,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:49:43,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:49:43,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:49:43,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:49:43,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:43,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:49:43,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:49:43,212 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 -> DAGSIZE 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 21:49:43,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:49:43,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:49:43,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:49:43,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:49:43,556 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:49:43,557 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-07-20 21:49:43,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f95d8e09/fd56e95e801647fcb41bdf76d83fd5aa/FLAG987306cdf [2020-07-20 21:49:44,125 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:49:44,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2020-07-20 21:49:44,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f95d8e09/fd56e95e801647fcb41bdf76d83fd5aa/FLAG987306cdf [2020-07-20 21:49:44,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f95d8e09/fd56e95e801647fcb41bdf76d83fd5aa [2020-07-20 21:49:44,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:49:44,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:49:44,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:44,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:49:44,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:49:44,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2043f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44, skipping insertion in model container [2020-07-20 21:49:44,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:49:44,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:49:44,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:44,739 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:49:44,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:44,784 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:49:44,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44 WrapperNode [2020-07-20 21:49:44,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:44,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:49:44,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:49:44,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:49:44,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (1/1) ... [2020-07-20 21:49:44,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:49:44,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:49:44,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:49:44,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:49:44,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (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 21:49:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:49:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:49:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:49:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:49:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:49:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:49:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:49:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:49:45,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:49:45,313 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:49:45,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:45 BoogieIcfgContainer [2020-07-20 21:49:45,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:49:45,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:49:45,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:49:45,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:49:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:44" (1/3) ... [2020-07-20 21:49:45,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efae272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:45, skipping insertion in model container [2020-07-20 21:49:45,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:44" (2/3) ... [2020-07-20 21:49:45,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efae272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:45, skipping insertion in model container [2020-07-20 21:49:45,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:45" (3/3) ... [2020-07-20 21:49:45,338 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-07-20 21:49:45,380 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:49:45,400 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:49:45,437 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:49:45,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:49:45,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:49:45,467 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:49:45,467 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:49:45,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:49:45,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:49:45,468 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:49:45,468 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:49:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-07-20 21:49:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:45,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,511 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 21:49:45,511 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-07-20 21:49:45,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464443888] [2020-07-20 21:49:45,526 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 21:49:45,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,683 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 21:49:45,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464443888] [2020-07-20 21:49:45,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075038564] [2020-07-20 21:49:45,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,712 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-07-20 21:49:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,774 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-07-20 21:49:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,795 INFO L225 Difference]: With dead ends: 81 [2020-07-20 21:49:45,795 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:49:45,799 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 21:49:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:49:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 21:49:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:49:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-07-20 21:49:45,849 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-07-20 21:49:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,850 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-07-20 21:49:45,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-07-20 21:49:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:45,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,852 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 21:49:46,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-07-20 21:49:46,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104763282] [2020-07-20 21:49:46,070 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 21:49:46,159 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,188 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 21:49:46,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104763282] [2020-07-20 21:49:46,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204249005] [2020-07-20 21:49:46,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,200 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-07-20 21:49:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,242 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-07-20 21:49:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,245 INFO L225 Difference]: With dead ends: 107 [2020-07-20 21:49:46,245 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 21:49:46,248 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 21:49:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 21:49:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-20 21:49:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 21:49:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-07-20 21:49:46,265 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-07-20 21:49:46,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,265 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-07-20 21:49:46,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-07-20 21:49:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:46,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:46,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,483 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-07-20 21:49:46,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209759697] [2020-07-20 21:49:46,486 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 21:49:46,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,571 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 21:49:46,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209759697] [2020-07-20 21:49:46,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637887779] [2020-07-20 21:49:46,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,578 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-07-20 21:49:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,622 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-07-20 21:49:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,626 INFO L225 Difference]: With dead ends: 99 [2020-07-20 21:49:46,626 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 21:49:46,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 21:49:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-07-20 21:49:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 21:49:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-07-20 21:49:46,646 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-07-20 21:49:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,647 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-07-20 21:49:46,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-07-20 21:49:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:46,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,860 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-07-20 21:49:46,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17054016] [2020-07-20 21:49:46,864 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 21:49:46,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:46,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17054016] [2020-07-20 21:49:46,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983884045] [2020-07-20 21:49:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,935 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-07-20 21:49:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,975 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-07-20 21:49:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,979 INFO L225 Difference]: With dead ends: 124 [2020-07-20 21:49:46,982 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 21:49:46,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 21:49:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-07-20 21:49:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 21:49:46,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-07-20 21:49:46,996 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-07-20 21:49:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,997 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-07-20 21:49:46,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-07-20 21:49:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:46,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,216 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-07-20 21:49:47,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766272337] [2020-07-20 21:49:47,219 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 21:49:47,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,296 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 21:49:47,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766272337] [2020-07-20 21:49:47,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868171217] [2020-07-20 21:49:47,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,300 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-07-20 21:49:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,325 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-07-20 21:49:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,328 INFO L225 Difference]: With dead ends: 204 [2020-07-20 21:49:47,328 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 21:49:47,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 21:49:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-07-20 21:49:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 21:49:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-07-20 21:49:47,342 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-07-20 21:49:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,342 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-07-20 21:49:47,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-07-20 21:49:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:47,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,561 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-07-20 21:49:47,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965635453] [2020-07-20 21:49:47,564 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 21:49:47,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,622 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 21:49:47,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965635453] [2020-07-20 21:49:47,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208023821] [2020-07-20 21:49:47,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,626 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-07-20 21:49:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,645 INFO L93 Difference]: Finished difference Result 226 states and 394 transitions. [2020-07-20 21:49:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,649 INFO L225 Difference]: With dead ends: 226 [2020-07-20 21:49:47,649 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 21:49:47,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 21:49:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 166. [2020-07-20 21:49:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 21:49:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 284 transitions. [2020-07-20 21:49:47,663 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 284 transitions. Word has length 21 [2020-07-20 21:49:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,664 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 284 transitions. [2020-07-20 21:49:47,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 284 transitions. [2020-07-20 21:49:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:47,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,882 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1470592243, now seen corresponding path program 1 times [2020-07-20 21:49:47,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012576592] [2020-07-20 21:49:47,884 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 21:49:47,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,935 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 21:49:47,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012576592] [2020-07-20 21:49:47,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402150681] [2020-07-20 21:49:47,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,938 INFO L87 Difference]: Start difference. First operand 166 states and 284 transitions. Second operand 3 states. [2020-07-20 21:49:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,964 INFO L93 Difference]: Finished difference Result 248 states and 422 transitions. [2020-07-20 21:49:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,966 INFO L225 Difference]: With dead ends: 248 [2020-07-20 21:49:47,966 INFO L226 Difference]: Without dead ends: 170 [2020-07-20 21:49:47,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-20 21:49:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-07-20 21:49:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-20 21:49:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-07-20 21:49:47,979 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-07-20 21:49:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-07-20 21:49:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-07-20 21:49:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:47,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:48,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,195 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-07-20 21:49:48,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796213484] [2020-07-20 21:49:48,198 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 21:49:48,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:48,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:48,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:48,243 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 21:49:48,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:48,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796213484] [2020-07-20 21:49:48,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:48,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:48,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178649230] [2020-07-20 21:49:48,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:48,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,247 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-07-20 21:49:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:48,279 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-07-20 21:49:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:48,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:48,283 INFO L225 Difference]: With dead ends: 392 [2020-07-20 21:49:48,283 INFO L226 Difference]: Without dead ends: 234 [2020-07-20 21:49:48,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-20 21:49:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-07-20 21:49:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 21:49:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-07-20 21:49:48,299 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-07-20 21:49:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:48,300 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-07-20 21:49:48,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-07-20 21:49:48,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:48,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:48,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:48,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,518 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-07-20 21:49:48,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257959580] [2020-07-20 21:49:48,520 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 21:49:48,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:48,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:48,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:48,581 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 21:49:48,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:48,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257959580] [2020-07-20 21:49:48,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:48,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:48,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985459120] [2020-07-20 21:49:48,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:48,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,584 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-07-20 21:49:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:48,604 INFO L93 Difference]: Finished difference Result 424 states and 716 transitions. [2020-07-20 21:49:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:48,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:48,608 INFO L225 Difference]: With dead ends: 424 [2020-07-20 21:49:48,609 INFO L226 Difference]: Without dead ends: 422 [2020-07-20 21:49:48,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-07-20 21:49:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 324. [2020-07-20 21:49:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-07-20 21:49:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 530 transitions. [2020-07-20 21:49:48,624 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 530 transitions. Word has length 22 [2020-07-20 21:49:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:48,625 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 530 transitions. [2020-07-20 21:49:48,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 530 transitions. [2020-07-20 21:49:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:48,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:48,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,843 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1490349311, now seen corresponding path program 1 times [2020-07-20 21:49:48,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572351644] [2020-07-20 21:49:48,846 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 21:49:48,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:48,897 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 21:49:48,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:48,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572351644] [2020-07-20 21:49:48,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:48,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:48,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403181427] [2020-07-20 21:49:48,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:48,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,900 INFO L87 Difference]: Start difference. First operand 324 states and 530 transitions. Second operand 3 states. [2020-07-20 21:49:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:48,924 INFO L93 Difference]: Finished difference Result 484 states and 788 transitions. [2020-07-20 21:49:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:48,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:48,927 INFO L225 Difference]: With dead ends: 484 [2020-07-20 21:49:48,927 INFO L226 Difference]: Without dead ends: 330 [2020-07-20 21:49:48,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-20 21:49:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2020-07-20 21:49:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-20 21:49:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-07-20 21:49:48,942 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-07-20 21:49:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:48,942 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-07-20 21:49:48,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-07-20 21:49:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:48,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:48,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:49,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,161 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-07-20 21:49:49,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:49,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531183849] [2020-07-20 21:49:49,163 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 21:49:49,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:49:49,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:49,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531183849] [2020-07-20 21:49:49,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:49,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:49,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263055641] [2020-07-20 21:49:49,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:49,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:49,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,236 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-07-20 21:49:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:49,262 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-07-20 21:49:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:49,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:49,266 INFO L225 Difference]: With dead ends: 764 [2020-07-20 21:49:49,267 INFO L226 Difference]: Without dead ends: 450 [2020-07-20 21:49:49,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-20 21:49:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-07-20 21:49:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-20 21:49:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-07-20 21:49:49,288 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-07-20 21:49:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:49,288 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-07-20 21:49:49,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-07-20 21:49:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:49,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:49,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:49,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,505 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-07-20 21:49:49,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:49,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867740748] [2020-07-20 21:49:49,508 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 [2020-07-20 21:49:49,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:49,561 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 21:49:49,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:49,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867740748] [2020-07-20 21:49:49,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:49,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:49,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932879830] [2020-07-20 21:49:49,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:49,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,569 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-07-20 21:49:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:49,608 INFO L93 Difference]: Finished difference Result 804 states and 1296 transitions. [2020-07-20 21:49:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:49,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:49,615 INFO L225 Difference]: With dead ends: 804 [2020-07-20 21:49:49,615 INFO L226 Difference]: Without dead ends: 802 [2020-07-20 21:49:49,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-07-20 21:49:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 640. [2020-07-20 21:49:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-07-20 21:49:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 990 transitions. [2020-07-20 21:49:49,665 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 990 transitions. Word has length 23 [2020-07-20 21:49:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:49,665 INFO L479 AbstractCegarLoop]: Abstraction has 640 states and 990 transitions. [2020-07-20 21:49:49,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 990 transitions. [2020-07-20 21:49:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:49,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:49,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:49,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,882 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1209742686, now seen corresponding path program 1 times [2020-07-20 21:49:49,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:49,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808103396] [2020-07-20 21:49:49,885 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 [2020-07-20 21:49:49,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:49,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:49,936 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 21:49:49,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:49,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808103396] [2020-07-20 21:49:49,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:49,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:49,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032912283] [2020-07-20 21:49:49,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:49,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,939 INFO L87 Difference]: Start difference. First operand 640 states and 990 transitions. Second operand 3 states. [2020-07-20 21:49:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:49,978 INFO L93 Difference]: Finished difference Result 956 states and 1472 transitions. [2020-07-20 21:49:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:49,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:49,983 INFO L225 Difference]: With dead ends: 956 [2020-07-20 21:49:49,983 INFO L226 Difference]: Without dead ends: 650 [2020-07-20 21:49:49,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-07-20 21:49:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2020-07-20 21:49:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-07-20 21:49:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-07-20 21:49:50,008 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-07-20 21:49:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:50,009 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-07-20 21:49:50,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-07-20 21:49:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:50,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:50,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,225 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-07-20 21:49:50,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:50,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617253080] [2020-07-20 21:49:50,226 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 [2020-07-20 21:49:50,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:50,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:50,288 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 21:49:50,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:50,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617253080] [2020-07-20 21:49:50,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:50,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:50,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973258978] [2020-07-20 21:49:50,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:50,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,291 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-07-20 21:49:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:50,330 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-07-20 21:49:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:50,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:50,337 INFO L225 Difference]: With dead ends: 1500 [2020-07-20 21:49:50,337 INFO L226 Difference]: Without dead ends: 874 [2020-07-20 21:49:50,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-07-20 21:49:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-07-20 21:49:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-07-20 21:49:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-07-20 21:49:50,385 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-07-20 21:49:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:50,386 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-07-20 21:49:50,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-07-20 21:49:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:50,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:50,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:50,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:50,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:50,603 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-07-20 21:49:50,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:50,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442367949] [2020-07-20 21:49:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:50,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:50,660 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 21:49:50,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:50,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442367949] [2020-07-20 21:49:50,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:50,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:50,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205897695] [2020-07-20 21:49:50,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:50,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,663 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-07-20 21:49:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:50,699 INFO L93 Difference]: Finished difference Result 1532 states and 2328 transitions. [2020-07-20 21:49:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:50,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:50,708 INFO L225 Difference]: With dead ends: 1532 [2020-07-20 21:49:50,709 INFO L226 Difference]: Without dead ends: 1530 [2020-07-20 21:49:50,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-07-20 21:49:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1272. [2020-07-20 21:49:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-07-20 21:49:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1846 transitions. [2020-07-20 21:49:50,759 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1846 transitions. Word has length 24 [2020-07-20 21:49:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:50,760 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 1846 transitions. [2020-07-20 21:49:50,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1846 transitions. [2020-07-20 21:49:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:50,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:50,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:50,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,977 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 986751668, now seen corresponding path program 1 times [2020-07-20 21:49:50,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:50,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780422191] [2020-07-20 21:49:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:51,032 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 21:49:51,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:51,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780422191] [2020-07-20 21:49:51,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:51,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262455785] [2020-07-20 21:49:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:51,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,035 INFO L87 Difference]: Start difference. First operand 1272 states and 1846 transitions. Second operand 3 states. [2020-07-20 21:49:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:51,078 INFO L93 Difference]: Finished difference Result 2940 states and 4280 transitions. [2020-07-20 21:49:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:51,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:51,088 INFO L225 Difference]: With dead ends: 2940 [2020-07-20 21:49:51,088 INFO L226 Difference]: Without dead ends: 1690 [2020-07-20 21:49:51,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2020-07-20 21:49:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1688. [2020-07-20 21:49:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2020-07-20 21:49:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2406 transitions. [2020-07-20 21:49:51,149 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2406 transitions. Word has length 24 [2020-07-20 21:49:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:51,150 INFO L479 AbstractCegarLoop]: Abstraction has 1688 states and 2406 transitions. [2020-07-20 21:49:51,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2406 transitions. [2020-07-20 21:49:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:51,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:51,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:51,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,368 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:51,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1111552059, now seen corresponding path program 1 times [2020-07-20 21:49:51,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:51,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943307731] [2020-07-20 21:49:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:51,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:51,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:51,419 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 21:49:51,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:51,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943307731] [2020-07-20 21:49:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940462159] [2020-07-20 21:49:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,422 INFO L87 Difference]: Start difference. First operand 1688 states and 2406 transitions. Second operand 3 states. [2020-07-20 21:49:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:51,501 INFO L93 Difference]: Finished difference Result 2908 states and 4200 transitions. [2020-07-20 21:49:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:51,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:51,516 INFO L225 Difference]: With dead ends: 2908 [2020-07-20 21:49:51,516 INFO L226 Difference]: Without dead ends: 2906 [2020-07-20 21:49:51,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2020-07-20 21:49:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2520. [2020-07-20 21:49:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-07-20 21:49:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3494 transitions. [2020-07-20 21:49:51,600 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3494 transitions. Word has length 25 [2020-07-20 21:49:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:51,600 INFO L479 AbstractCegarLoop]: Abstraction has 2520 states and 3494 transitions. [2020-07-20 21:49:51,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3494 transitions. [2020-07-20 21:49:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:51,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:51,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,809 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1369717497, now seen corresponding path program 1 times [2020-07-20 21:49:51,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:51,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438052571] [2020-07-20 21:49:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:51,861 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 21:49:51,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:51,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438052571] [2020-07-20 21:49:51,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:51,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:51,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148553294] [2020-07-20 21:49:51,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:51,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,864 INFO L87 Difference]: Start difference. First operand 2520 states and 3494 transitions. Second operand 3 states. [2020-07-20 21:49:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:51,943 INFO L93 Difference]: Finished difference Result 5788 states and 8040 transitions. [2020-07-20 21:49:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:51,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:51,960 INFO L225 Difference]: With dead ends: 5788 [2020-07-20 21:49:51,960 INFO L226 Difference]: Without dead ends: 3290 [2020-07-20 21:49:51,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2020-07-20 21:49:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 3288. [2020-07-20 21:49:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3288 states. [2020-07-20 21:49:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4454 transitions. [2020-07-20 21:49:52,082 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4454 transitions. Word has length 25 [2020-07-20 21:49:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:52,083 INFO L479 AbstractCegarLoop]: Abstraction has 3288 states and 4454 transitions. [2020-07-20 21:49:52,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4454 transitions. [2020-07-20 21:49:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:49:52,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:52,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:52,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:52,306 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 98591211, now seen corresponding path program 1 times [2020-07-20 21:49:52,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:52,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267767075] [2020-07-20 21:49:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:52,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:52,360 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 21:49:52,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:52,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267767075] [2020-07-20 21:49:52,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:52,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:52,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913236727] [2020-07-20 21:49:52,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:52,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:52,363 INFO L87 Difference]: Start difference. First operand 3288 states and 4454 transitions. Second operand 3 states. [2020-07-20 21:49:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:52,456 INFO L93 Difference]: Finished difference Result 9692 states and 13032 transitions. [2020-07-20 21:49:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:52,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 21:49:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:52,486 INFO L225 Difference]: With dead ends: 9692 [2020-07-20 21:49:52,486 INFO L226 Difference]: Without dead ends: 6426 [2020-07-20 21:49:52,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2020-07-20 21:49:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6424. [2020-07-20 21:49:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6424 states. [2020-07-20 21:49:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 8358 transitions. [2020-07-20 21:49:52,757 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 8358 transitions. Word has length 26 [2020-07-20 21:49:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:52,757 INFO L479 AbstractCegarLoop]: Abstraction has 6424 states and 8358 transitions. [2020-07-20 21:49:52,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 8358 transitions. [2020-07-20 21:49:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:49:52,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:52,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:52,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:52,984 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:52,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -159574227, now seen corresponding path program 1 times [2020-07-20 21:49:52,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:52,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603706260] [2020-07-20 21:49:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:53,015 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:53,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:53,029 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 21:49:53,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:53,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603706260] [2020-07-20 21:49:53,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:53,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:53,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318962297] [2020-07-20 21:49:53,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:53,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:53,031 INFO L87 Difference]: Start difference. First operand 6424 states and 8358 transitions. Second operand 3 states. [2020-07-20 21:49:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:53,132 INFO L93 Difference]: Finished difference Result 6940 states and 9128 transitions. [2020-07-20 21:49:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:53,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 21:49:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:53,184 INFO L225 Difference]: With dead ends: 6940 [2020-07-20 21:49:53,185 INFO L226 Difference]: Without dead ends: 6938 [2020-07-20 21:49:53,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2020-07-20 21:49:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 6424. [2020-07-20 21:49:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6424 states. [2020-07-20 21:49:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 8230 transitions. [2020-07-20 21:49:53,522 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 8230 transitions. Word has length 26 [2020-07-20 21:49:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:53,522 INFO L479 AbstractCegarLoop]: Abstraction has 6424 states and 8230 transitions. [2020-07-20 21:49:53,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 8230 transitions. [2020-07-20 21:49:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:53,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:53,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:53,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:53,734 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1238423664, now seen corresponding path program 1 times [2020-07-20 21:49:53,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:53,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046319473] [2020-07-20 21:49:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:53,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:53,778 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 21:49:53,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:53,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046319473] [2020-07-20 21:49:53,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:53,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:53,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113370692] [2020-07-20 21:49:53,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:53,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:53,780 INFO L87 Difference]: Start difference. First operand 6424 states and 8230 transitions. Second operand 3 states. [2020-07-20 21:49:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:53,914 INFO L93 Difference]: Finished difference Result 10522 states and 13351 transitions. [2020-07-20 21:49:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:53,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:53,941 INFO L225 Difference]: With dead ends: 10522 [2020-07-20 21:49:53,941 INFO L226 Difference]: Without dead ends: 10520 [2020-07-20 21:49:53,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10520 states. [2020-07-20 21:49:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10520 to 10008. [2020-07-20 21:49:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10008 states. [2020-07-20 21:49:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 12582 transitions. [2020-07-20 21:49:54,172 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 12582 transitions. Word has length 27 [2020-07-20 21:49:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:54,172 INFO L479 AbstractCegarLoop]: Abstraction has 10008 states and 12582 transitions. [2020-07-20 21:49:54,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 12582 transitions. [2020-07-20 21:49:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:49:54,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:54,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:54,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:54,405 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -980258226, now seen corresponding path program 1 times [2020-07-20 21:49:54,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:54,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363975971] [2020-07-20 21:49:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:54,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:54,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:54,454 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 21:49:54,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:54,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363975971] [2020-07-20 21:49:54,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:54,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:54,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281893553] [2020-07-20 21:49:54,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:54,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:54,458 INFO L87 Difference]: Start difference. First operand 10008 states and 12582 transitions. Second operand 3 states. [2020-07-20 21:49:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:54,714 INFO L93 Difference]: Finished difference Result 22552 states and 28198 transitions. [2020-07-20 21:49:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:54,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 21:49:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:54,716 INFO L225 Difference]: With dead ends: 22552 [2020-07-20 21:49:54,716 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:49:54,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:49:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:49:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:49:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:49:54,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-20 21:49:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:54,757 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:49:54,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:49:54,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:49:54,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:54,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:49:55,039 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:49:55,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:55,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:55,039 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:49:55,040 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:49:55,040 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:49:55,040 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,040 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-07-20 21:49:55,040 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,040 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-20 21:49:55,041 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,041 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-07-20 21:49:55,041 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,041 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-07-20 21:49:55,041 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,043 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,044 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-07-20 21:49:55,044 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-07-20 21:49:55,044 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-07-20 21:49:55,044 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,044 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-20 21:49:55,045 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,045 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-07-20 21:49:55,045 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-07-20 21:49:55,045 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-07-20 21:49:55,046 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-07-20 21:49:55,046 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,046 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,046 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,046 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-07-20 21:49:55,046 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-20 21:49:55,047 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-07-20 21:49:55,048 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,048 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-07-20 21:49:55,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:55 BoogieIcfgContainer [2020-07-20 21:49:55,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:49:55,072 INFO L168 Benchmark]: Toolchain (without parser) took 10591.53 ms. Allocated memory was 142.6 MB in the beginning and 354.9 MB in the end (delta: 212.3 MB). Free memory was 100.5 MB in the beginning and 208.0 MB in the end (delta: -107.5 MB). Peak memory consumption was 104.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,075 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.86 ms. Allocated memory is still 142.6 MB. Free memory was 100.1 MB in the beginning and 89.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,082 INFO L168 Benchmark]: Boogie Preprocessor took 154.97 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 89.4 MB in the beginning and 177.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,085 INFO L168 Benchmark]: RCFGBuilder took 374.30 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 159.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,086 INFO L168 Benchmark]: TraceAbstraction took 9747.66 ms. Allocated memory was 200.3 MB in the beginning and 354.9 MB in the end (delta: 154.7 MB). Free memory was 158.4 MB in the beginning and 208.0 MB in the end (delta: -49.5 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:55,092 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.86 ms. Allocated memory is still 142.6 MB. Free memory was 100.1 MB in the beginning and 89.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.97 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 89.4 MB in the beginning and 177.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.30 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 159.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9747.66 ms. Allocated memory was 200.3 MB in the beginning and 354.9 MB in the end (delta: 154.7 MB). Free memory was 158.4 MB in the beginning and 208.0 MB in the end (delta: -49.5 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.5s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1697 SDtfs, 806 SDslu, 1164 SDs, 0 SdLazy, 118 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 478 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10008occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 2066 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 500 NumberOfCodeBlocks, 333 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 20256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1947 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 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...