/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --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/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:00:09,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:00:09,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:00:09,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 17:00:09,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:00:09,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:00:09,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:00:09,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:00:09,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:00:09,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:00:09,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:00:09,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:00:09,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:00:09,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:00:09,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:00:09,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:00:09,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:00:09,639 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 17:00:09,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:00:09,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:00:09,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:00:09,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:00:09,660 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:00:09,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:00:09,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:00:09,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:00:09,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:00:09,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:00:09,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:00:09,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:00:09,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:00:09,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:00:09,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:00:09,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:00:09,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:00:09,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:00:09,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:00:09,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:00:09,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:00:09,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:00:09,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:00:09,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:00:09,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:00:09,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:00:09,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:09,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:00:09,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:00:09,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 17:00:10,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:00:10,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:00:10,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:00:10,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:00:10,127 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:00:10,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 17:00:10,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c65718b1/c8402cd0df0b44c9bd83331ab45f757b/FLAG177aa10a5 [2020-07-20 17:00:10,869 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:00:10,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-07-20 17:00:10,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c65718b1/c8402cd0df0b44c9bd83331ab45f757b/FLAG177aa10a5 [2020-07-20 17:00:11,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c65718b1/c8402cd0df0b44c9bd83331ab45f757b [2020-07-20 17:00:11,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:00:11,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:00:11,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:00:11,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:00:11,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:00:11,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6ce331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11, skipping insertion in model container [2020-07-20 17:00:11,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:00:11,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:00:11,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:00:11,470 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:00:11,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:00:11,510 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:00:11,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11 WrapperNode [2020-07-20 17:00:11,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:00:11,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:00:11,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:00:11,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:00:11,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (1/1) ... [2020-07-20 17:00:11,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:00:11,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:00:11,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:00:11,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:00:11,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (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 17:00:11,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:00:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:00:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 17:00:11,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:00:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:00:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 17:00:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:00:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:00:11,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:00:11,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:00:11,976 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:00:11,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:00:11 BoogieIcfgContainer [2020-07-20 17:00:11,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:00:11,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:00:11,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:00:11,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:00:11,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:00:11" (1/3) ... [2020-07-20 17:00:11,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d2e979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:00:11, skipping insertion in model container [2020-07-20 17:00:11,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:00:11" (2/3) ... [2020-07-20 17:00:11,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d2e979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:00:11, skipping insertion in model container [2020-07-20 17:00:11,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:00:11" (3/3) ... [2020-07-20 17:00:11,996 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-07-20 17:00:12,011 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:00:12,022 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:00:12,044 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:00:12,091 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:00:12,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:00:12,092 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:00:12,093 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:00:12,093 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:00:12,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:00:12,094 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:00:12,094 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:00:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 17:00:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:00:12,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:12,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:12,167 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 17:00:12,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:12,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261049181] [2020-07-20 17:00:12,215 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 17:00:12,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:00:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:12,401 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 17:00:12,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:00:12,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261049181] [2020-07-20 17:00:12,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:00:12,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:00:12,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965394850] [2020-07-20 17:00:12,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:00:12,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:00:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:00:12,437 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 17:00:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:12,567 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 17:00:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:00:12,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 17:00:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:12,585 INFO L225 Difference]: With dead ends: 30 [2020-07-20 17:00:12,585 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 17:00:12,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:00:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 17:00:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 17:00:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 17:00:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 17:00:12,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 17:00:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:12,657 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 17:00:12,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:00:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 17:00:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:00:12,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:12,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:12,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:12,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:12,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 17:00:12,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:12,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354396867] [2020-07-20 17:00:12,879 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 17:00:12,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:12,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:12,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:00:12,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:00:12,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:13,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:00:13,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354396867] [2020-07-20 17:00:13,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:13,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 17:00:13,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410885553] [2020-07-20 17:00:13,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:00:13,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:00:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:00:13,297 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 17:00:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:13,416 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 17:00:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:00:13,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 17:00:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:13,419 INFO L225 Difference]: With dead ends: 25 [2020-07-20 17:00:13,419 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 17:00:13,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:00:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 17:00:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 17:00:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 17:00:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 17:00:13,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 17:00:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:13,431 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 17:00:13,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:00:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 17:00:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:00:13,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:13,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:13,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:13,649 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 17:00:13,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:13,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273740744] [2020-07-20 17:00:13,652 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 17:00:13,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:13,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:13,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:00:13,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:00:13,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:14,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:14,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:14,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:14,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:00:14,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273740744] [2020-07-20 17:00:14,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:14,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 17:00:14,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863649056] [2020-07-20 17:00:14,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:00:14,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:14,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:00:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:00:14,206 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 17:00:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:14,313 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 17:00:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:00:14,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 17:00:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:14,316 INFO L225 Difference]: With dead ends: 28 [2020-07-20 17:00:14,316 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 17:00:14,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:00:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 17:00:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 17:00:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 17:00:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 17:00:14,326 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 17:00:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:14,327 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 17:00:14,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:00:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 17:00:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:00:14,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:14,330 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:14,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:14,547 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 17:00:14,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:14,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638263846] [2020-07-20 17:00:14,549 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 17:00:14,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:14,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 17:00:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:00:14,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:15,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:15,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:15,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:15,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:15,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 17:00:15,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638263846] [2020-07-20 17:00:15,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:15,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 17:00:15,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243701381] [2020-07-20 17:00:15,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:00:15,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:00:15,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:00:15,444 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 17:00:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:15,578 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 17:00:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:00:15,579 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 17:00:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:15,581 INFO L225 Difference]: With dead ends: 31 [2020-07-20 17:00:15,581 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 17:00:15,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:00:15,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 17:00:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 17:00:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:00:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 17:00:15,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 17:00:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:15,592 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 17:00:15,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:00:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 17:00:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:00:15,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:15,593 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:15,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:15,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:15,796 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 17:00:15,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:15,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928911593] [2020-07-20 17:00:15,798 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 17:00:15,842 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 17:00:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 17:00:15,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:16,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:16,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:16,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:16,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:16,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 17:00:17,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928911593] [2020-07-20 17:00:17,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:17,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 17:00:17,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681014528] [2020-07-20 17:00:17,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:00:17,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:00:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:00:17,018 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 17:00:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:17,153 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 17:00:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:00:17,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 17:00:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:17,160 INFO L225 Difference]: With dead ends: 34 [2020-07-20 17:00:17,160 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 17:00:17,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 17:00:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 17:00:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 17:00:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 17:00:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 17:00:17,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 17:00:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:17,170 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 17:00:17,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:00:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 17:00:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 17:00:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:17,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:17,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:17,386 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 17:00:17,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:17,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39272057] [2020-07-20 17:00:17,389 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 17:00:17,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:17,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:00:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 17:00:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:18,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:18,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:18,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:18,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:19,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:19,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:19,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:00:19,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39272057] [2020-07-20 17:00:19,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:19,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 17:00:19,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659360576] [2020-07-20 17:00:19,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 17:00:19,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 17:00:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:00:19,136 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 17:00:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:19,350 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 17:00:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:00:19,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 17:00:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:19,353 INFO L225 Difference]: With dead ends: 37 [2020-07-20 17:00:19,353 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:00:19,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:00:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:00:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 17:00:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:00:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 17:00:19,365 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 17:00:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:19,365 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 17:00:19,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 17:00:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 17:00:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 17:00:19,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:19,368 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:19,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:19,598 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:19,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 17:00:19,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:19,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73150809] [2020-07-20 17:00:19,599 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 17:00:19,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 17:00:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 17:00:19,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:21,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:21,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 17:00:22,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73150809] [2020-07-20 17:00:22,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:22,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 17:00:22,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127553955] [2020-07-20 17:00:22,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 17:00:22,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 17:00:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 17:00:22,052 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 17:00:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:22,286 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 17:00:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:00:22,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 17:00:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:22,289 INFO L225 Difference]: With dead ends: 40 [2020-07-20 17:00:22,290 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 17:00:22,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 17:00:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 17:00:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 17:00:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:00:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 17:00:22,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 17:00:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:22,301 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 17:00:22,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 17:00:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 17:00:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 17:00:22,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:22,303 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:22,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:22,505 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 17:00:22,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:22,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023970316] [2020-07-20 17:00:22,508 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 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 17:00:22,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:22,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 17:00:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 17:00:22,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:24,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:24,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 17:00:25,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023970316] [2020-07-20 17:00:25,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:25,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 17:00:25,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21665080] [2020-07-20 17:00:25,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 17:00:25,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 17:00:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 17:00:25,788 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 17:00:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:26,044 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 17:00:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:00:26,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 17:00:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:26,053 INFO L225 Difference]: With dead ends: 43 [2020-07-20 17:00:26,053 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:00:26,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 17:00:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:00:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 17:00:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 17:00:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 17:00:26,068 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 17:00:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:26,069 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 17:00:26,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 17:00:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 17:00:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 17:00:26,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:26,071 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:26,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:26,275 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 17:00:26,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:26,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672992169] [2020-07-20 17:00:26,277 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 17:00:26,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:26,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 17:00:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 17:00:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:28,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:28,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:29,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:30,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:31,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:31,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:31,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 17:00:31,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672992169] [2020-07-20 17:00:31,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:31,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 17:00:31,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103376625] [2020-07-20 17:00:31,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 17:00:31,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 17:00:31,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:00:31,196 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 17:00:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:31,442 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 17:00:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 17:00:31,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 17:00:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:31,445 INFO L225 Difference]: With dead ends: 46 [2020-07-20 17:00:31,446 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:00:31,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 17:00:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:00:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 17:00:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 17:00:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 17:00:31,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 17:00:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:31,456 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 17:00:31,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 17:00:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 17:00:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 17:00:31,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:31,458 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:31,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:31,669 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 17:00:31,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:31,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348469764] [2020-07-20 17:00:31,673 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 17:00:31,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:00:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:00:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 17:00:31,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:00:35,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:35,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:36,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:36,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:37,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:37,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:00:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 17:00:38,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348469764] [2020-07-20 17:00:38,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:00:38,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 17:00:38,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482120118] [2020-07-20 17:00:38,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 17:00:38,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 17:00:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 17:00:38,618 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-20 17:00:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:38,879 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 17:00:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 17:00:38,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-20 17:00:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:38,882 INFO L225 Difference]: With dead ends: 49 [2020-07-20 17:00:38,883 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 17:00:38,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 17:00:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 17:00:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 17:00:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:00:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 17:00:38,893 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 17:00:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:38,893 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 17:00:38,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 17:00:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 17:00:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 17:00:38,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:00:38,896 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:00:39,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:39,111 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:00:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:00:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 17:00:39,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:00:39,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836703963] [2020-07-20 17:00:39,113 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 17:00:39,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:00:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:00:39,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 135 conjunts are in the unsatisfiable core [2020-07-20 17:00:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:00:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-07-20 17:00:39,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:00:39,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836703963] [2020-07-20 17:00:39,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:00:39,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:00:39,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81106784] [2020-07-20 17:00:39,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:00:39,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:00:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:00:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:00:39,446 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-07-20 17:00:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:00:39,537 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-07-20 17:00:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:00:39,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-07-20 17:00:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:00:39,539 INFO L225 Difference]: With dead ends: 45 [2020-07-20 17:00:39,539 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:00:39,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:00:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:00:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:00:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:00:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:00:39,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-07-20 17:00:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:00:39,543 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:00:39,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:00:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:00:39,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:00:39,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:00:39,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:00:39,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:00:39,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:00:39,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:00:39,859 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:00:39,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:00:39,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:00:39,860 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 17:00:39,860 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2020-07-20 17:00:39,860 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 17:00:39,861 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 17:00:39,861 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 17:00:39,861 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 17:00:39,861 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 17:00:39,861 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 17:00:39,861 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 17:00:39,862 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 17:00:39,862 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 17:00:39,862 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (<= 10 main_~a~0) [2020-07-20 17:00:39,863 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 17:00:39,863 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 17:00:39,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:00:39 BoogieIcfgContainer [2020-07-20 17:00:39,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:00:39,876 INFO L168 Benchmark]: Toolchain (without parser) took 28648.00 ms. Allocated memory was 136.3 MB in the beginning and 451.9 MB in the end (delta: 315.6 MB). Free memory was 101.2 MB in the beginning and 401.4 MB in the end (delta: -300.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:00:39,877 INFO L168 Benchmark]: CDTParser took 0.97 ms. Allocated memory is still 136.3 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:00:39,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.72 ms. Allocated memory is still 136.3 MB. Free memory was 100.8 MB in the beginning and 91.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:00:39,878 INFO L168 Benchmark]: Boogie Preprocessor took 42.70 ms. Allocated memory is still 136.3 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:00:39,879 INFO L168 Benchmark]: RCFGBuilder took 426.44 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 90.5 MB in the beginning and 169.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:00:39,880 INFO L168 Benchmark]: TraceAbstraction took 27887.36 ms. Allocated memory was 200.8 MB in the beginning and 451.9 MB in the end (delta: 251.1 MB). Free memory was 168.1 MB in the beginning and 401.4 MB in the end (delta: -233.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:00:39,884 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97 ms. Allocated memory is still 136.3 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.72 ms. Allocated memory is still 136.3 MB. Free memory was 100.8 MB in the beginning and 91.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.70 ms. Allocated memory is still 136.3 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.44 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 90.5 MB in the beginning and 169.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27887.36 ms. Allocated memory was 200.8 MB in the beginning and 451.9 MB in the end (delta: 251.1 MB). Free memory was 168.1 MB in the beginning and 401.4 MB in the end (delta: -233.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.6s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 512 SDslu, 729 SDs, 0 SdLazy, 511 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 598 SyntacticMatches, 109 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 473 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 840 ConstructedInterpolants, 0 QuantifiedInterpolants, 130920 SizeOfPredicates, 87 NumberOfNonLiveVariables, 1051 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 925/2110 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...