/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:50:46,415 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 00:50:46,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:50:46,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:50:46,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:50:46,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:50:46,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:50:46,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:50:46,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:50:46,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:50:46,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:50:46,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:50:46,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:50:46,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:50:46,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:50:46,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 00:50:46,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:50:46,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:50:46,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:50:46,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:50:46,578 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:50:46,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:50:46,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:50:46,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:50:46,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:50:46,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:50:46,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:50:46,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:50:46,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:50:46,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:50:46,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:50:46,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:50:46,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:50:46,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:50:46,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:50:46,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:50:46,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:50:46,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:50:46,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:50:46,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:50:46,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:50:46,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:50:46,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:46,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:50:46,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:50:46,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 00:50:46,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:50:46,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:50:46,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:50:46,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:50:46,941 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:50:46,942 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 00:50:47,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9ebad9a/f2bd84f261c5458ca41f6623d9f52d3c/FLAGb59508fca [2020-07-21 00:50:47,623 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:50:47,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-21 00:50:47,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9ebad9a/f2bd84f261c5458ca41f6623d9f52d3c/FLAGb59508fca [2020-07-21 00:50:47,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9ebad9a/f2bd84f261c5458ca41f6623d9f52d3c [2020-07-21 00:50:47,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:50:47,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:50:47,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:50:47,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:50:47,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:50:47,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:50:47" (1/1) ... [2020-07-21 00:50:47,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f165e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:47, skipping insertion in model container [2020-07-21 00:50:47,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:50:47" (1/1) ... [2020-07-21 00:50:47,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:50:48,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:50:48,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:50:48,324 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:50:48,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:50:48,372 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:50:48,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48 WrapperNode [2020-07-21 00:50:48,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:50:48,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:50:48,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:50:48,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:50:48,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... [2020-07-21 00:50:48,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:50:48,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:50:48,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:50:48,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:50:48,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:50:48,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:50:48,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:50:48,623 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 00:50:48,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:50:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 00:50:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:50:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 00:50:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:50:48,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:50:48,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:50:48,832 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:50:48,833 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 00:50:48,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:50:48 BoogieIcfgContainer [2020-07-21 00:50:48,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:50:48,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:50:48,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:50:48,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:50:48,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:50:47" (1/3) ... [2020-07-21 00:50:48,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d479611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:50:48, skipping insertion in model container [2020-07-21 00:50:48,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:50:48" (2/3) ... [2020-07-21 00:50:48,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d479611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:50:48, skipping insertion in model container [2020-07-21 00:50:48,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:50:48" (3/3) ... [2020-07-21 00:50:48,850 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-21 00:50:48,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:50:48,874 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:50:48,893 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:50:48,924 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:50:48,925 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:50:48,925 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:50:48,925 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:50:48,925 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:50:48,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:50:48,926 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:50:48,926 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:50:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 00:50:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 00:50:48,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:48,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:48,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 00:50:48,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:48,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069855147] [2020-07-21 00:50:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:49,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:49,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:50:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:50:49,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:50:49,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069855147] [2020-07-21 00:50:49,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:50:49,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:50:49,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640827994] [2020-07-21 00:50:49,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:50:49,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:49,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:50:49,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:50:49,280 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 00:50:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:49,428 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 00:50:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:50:49,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 00:50:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:49,444 INFO L225 Difference]: With dead ends: 35 [2020-07-21 00:50:49,444 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 00:50:49,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:50:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 00:50:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 00:50:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:50:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:50:49,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 00:50:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:49,501 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:50:49,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:50:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:50:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 00:50:49,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:49,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:49,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:49,711 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 00:50:49,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:49,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179297769] [2020-07-21 00:50:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:49,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:50:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 00:50:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 00:50:49,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:50:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179297769] [2020-07-21 00:50:49,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:50:49,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 00:50:49,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098305365] [2020-07-21 00:50:49,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 00:50:49,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 00:50:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 00:50:49,786 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 00:50:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:49,873 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 00:50:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 00:50:49,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 00:50:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:49,876 INFO L225 Difference]: With dead ends: 27 [2020-07-21 00:50:49,876 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 00:50:49,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 00:50:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 00:50:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 00:50:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 00:50:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 00:50:49,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 00:50:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:49,889 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 00:50:49,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 00:50:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 00:50:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 00:50:49,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:49,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:50,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,108 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 00:50:50,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:50,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546091786] [2020-07-21 00:50:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:50,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:50:50,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 00:50:50,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:50,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:50:50,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546091786] [2020-07-21 00:50:50,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:50,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:50:50,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937684314] [2020-07-21 00:50:50,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:50:50,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:50,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:50:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:50:50,480 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 00:50:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:50,613 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 00:50:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:50:50,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 00:50:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:50,616 INFO L225 Difference]: With dead ends: 32 [2020-07-21 00:50:50,616 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 00:50:50,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 00:50:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 00:50:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:50:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:50:50,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 00:50:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:50,629 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:50:50,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:50:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:50:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 00:50:50,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:50,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:50,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,849 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 00:50:50,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:50,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967072820] [2020-07-21 00:50:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:50,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:50,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 00:50:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 00:50:50,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:51,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 00:50:51,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967072820] [2020-07-21 00:50:51,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:51,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 00:50:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408773611] [2020-07-21 00:50:51,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 00:50:51,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 00:50:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 00:50:51,212 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 00:50:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:51,352 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 00:50:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 00:50:51,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 00:50:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:51,362 INFO L225 Difference]: With dead ends: 37 [2020-07-21 00:50:51,362 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 00:50:51,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 00:50:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 00:50:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 00:50:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 00:50:51,388 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 00:50:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:51,389 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 00:50:51,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 00:50:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 00:50:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 00:50:51,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:51,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:51,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:51,606 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 00:50:51,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:51,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34641533] [2020-07-21 00:50:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:51,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:51,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:51,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:50:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 00:50:51,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:51,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:51,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:50:52,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34641533] [2020-07-21 00:50:52,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:52,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:50:52,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706504202] [2020-07-21 00:50:52,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:50:52,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:50:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:52,097 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 00:50:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:52,306 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 00:50:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:50:52,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 00:50:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:52,310 INFO L225 Difference]: With dead ends: 42 [2020-07-21 00:50:52,311 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 00:50:52,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:50:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 00:50:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 00:50:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:50:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:50:52,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 00:50:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:52,324 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:50:52,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:50:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:50:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 00:50:52,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:52,327 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:52,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:52,538 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 00:50:52,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:52,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154913448] [2020-07-21 00:50:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:52,597 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 00:50:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 00:50:52,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:52,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:52,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 00:50:53,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154913448] [2020-07-21 00:50:53,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:53,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 00:50:53,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919110315] [2020-07-21 00:50:53,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 00:50:53,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 00:50:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 00:50:53,035 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 00:50:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:53,193 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 00:50:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 00:50:53,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 00:50:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:53,201 INFO L225 Difference]: With dead ends: 47 [2020-07-21 00:50:53,201 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 00:50:53,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:50:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 00:50:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 00:50:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 00:50:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 00:50:53,229 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 00:50:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:53,231 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 00:50:53,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 00:50:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 00:50:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 00:50:53,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:53,238 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:53,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:53,456 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 00:50:53,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:53,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688928618] [2020-07-21 00:50:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:53,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:50:53,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:50:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 00:50:53,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:54,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:54,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:54,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:54,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:54,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 00:50:54,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688928618] [2020-07-21 00:50:54,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:54,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:50:54,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223696770] [2020-07-21 00:50:54,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:50:54,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:50:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:50:54,252 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 00:50:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:54,471 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 00:50:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:50:54,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 00:50:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:54,475 INFO L225 Difference]: With dead ends: 52 [2020-07-21 00:50:54,475 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 00:50:54,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 00:50:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 00:50:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:50:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:50:54,490 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 00:50:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:54,491 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:50:54,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:50:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:50:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 00:50:54,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:54,494 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:54,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:54,709 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 00:50:54,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:54,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134494899] [2020-07-21 00:50:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:54,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:54,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 00:50:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 00:50:54,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:55,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:55,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:55,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:55,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 00:50:55,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134494899] [2020-07-21 00:50:55,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:55,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 00:50:55,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634190635] [2020-07-21 00:50:55,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 00:50:55,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:55,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 00:50:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 00:50:55,571 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 00:50:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:55,721 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 00:50:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 00:50:55,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 00:50:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:55,724 INFO L225 Difference]: With dead ends: 57 [2020-07-21 00:50:55,725 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 00:50:55,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:50:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 00:50:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 00:50:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 00:50:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 00:50:55,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 00:50:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:55,741 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 00:50:55,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 00:50:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 00:50:55,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 00:50:55,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:55,744 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:55,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:55,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 00:50:55,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:55,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459881055] [2020-07-21 00:50:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:56,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 00:50:56,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:56,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:56,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:57,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:57,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:57,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 00:50:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459881055] [2020-07-21 00:50:57,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:57,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:50:57,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824302248] [2020-07-21 00:50:57,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:57,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:57,245 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 00:50:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:57,575 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 00:50:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:50:57,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 00:50:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:57,579 INFO L225 Difference]: With dead ends: 62 [2020-07-21 00:50:57,579 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 00:50:57,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:50:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 00:50:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 00:50:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:50:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:50:57,595 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 00:50:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:57,596 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:50:57,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:50:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 00:50:57,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:57,600 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:57,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:57,815 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 00:50:57,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:57,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140946505] [2020-07-21 00:50:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:57,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:50:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 00:50:57,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:50:58,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:58,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:50:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 00:50:59,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140946505] [2020-07-21 00:50:59,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:50:59,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 00:50:59,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447954160] [2020-07-21 00:50:59,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 00:50:59,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:50:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 00:50:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 00:50:59,232 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 00:50:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:50:59,435 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 00:50:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:50:59,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 00:50:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:50:59,441 INFO L225 Difference]: With dead ends: 67 [2020-07-21 00:50:59,442 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 00:50:59,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:50:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 00:50:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 00:50:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 00:50:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 00:50:59,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 00:50:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:50:59,458 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 00:50:59,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 00:50:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 00:50:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 00:50:59,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:50:59,463 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:50:59,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:59,679 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:50:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:50:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 00:50:59,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:50:59,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726728737] [2020-07-21 00:50:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:50:59,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:50:59,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:50:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:50:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:50:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 00:50:59,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:01,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 00:51:01,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726728737] [2020-07-21 00:51:01,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:01,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 00:51:01,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960512907] [2020-07-21 00:51:01,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 00:51:01,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 00:51:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 00:51:01,959 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 00:51:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:02,220 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 00:51:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:02,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 00:51:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:02,225 INFO L225 Difference]: With dead ends: 72 [2020-07-21 00:51:02,226 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 00:51:02,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 00:51:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 00:51:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 00:51:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:51:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:51:02,263 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 00:51:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:02,264 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:51:02,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 00:51:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:51:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 00:51:02,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:02,271 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:02,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:02,485 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:02,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 00:51:02,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:02,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812877041] [2020-07-21 00:51:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:02,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:02,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 00:51:02,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:04,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 00:51:04,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812877041] [2020-07-21 00:51:04,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:04,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 00:51:04,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585305273] [2020-07-21 00:51:04,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:51:04,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:51:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:51:04,898 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 16 states. [2020-07-21 00:51:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:05,129 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 00:51:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:05,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 299 [2020-07-21 00:51:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:05,138 INFO L225 Difference]: With dead ends: 77 [2020-07-21 00:51:05,140 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:51:05,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:51:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:51:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 00:51:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 00:51:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 00:51:05,175 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 00:51:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:05,177 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 00:51:05,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:51:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 00:51:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 00:51:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:05,194 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:05,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:05,421 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 00:51:05,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:05,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141602438] [2020-07-21 00:51:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:05,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 00:51:05,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:08,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:08,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 00:51:09,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141602438] [2020-07-21 00:51:09,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:09,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 00:51:09,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908683180] [2020-07-21 00:51:09,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:09,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:09,568 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 18 states. [2020-07-21 00:51:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:10,093 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 00:51:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:10,094 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 507 [2020-07-21 00:51:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:10,099 INFO L225 Difference]: With dead ends: 82 [2020-07-21 00:51:10,099 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 00:51:10,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 00:51:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 00:51:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 00:51:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 00:51:10,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 00:51:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:10,117 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 00:51:10,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 00:51:10,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 00:51:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:10,121 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:10,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:10,337 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 00:51:10,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:10,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238083795] [2020-07-21 00:51:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:10,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 648 proven. 1709 refuted. 0 times theorem prover too weak. 9325 trivial. 0 not checked. [2020-07-21 00:51:10,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:12,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:12,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:13,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 652 proven. 1756 refuted. 0 times theorem prover too weak. 9274 trivial. 0 not checked. [2020-07-21 00:51:14,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238083795] [2020-07-21 00:51:14,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:14,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 00:51:14,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156281435] [2020-07-21 00:51:14,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:14,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:14,178 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 18 states. [2020-07-21 00:51:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:14,533 INFO L93 Difference]: Finished difference Result 147 states and 749 transitions. [2020-07-21 00:51:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:14,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 450 [2020-07-21 00:51:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:14,537 INFO L225 Difference]: With dead ends: 147 [2020-07-21 00:51:14,537 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 00:51:14,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 00:51:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-21 00:51:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 00:51:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 122 transitions. [2020-07-21 00:51:14,573 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 122 transitions. Word has length 450 [2020-07-21 00:51:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:14,576 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 122 transitions. [2020-07-21 00:51:14,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 122 transitions. [2020-07-21 00:51:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 00:51:14,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:14,583 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:14,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:14,797 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash -530192014, now seen corresponding path program 7 times [2020-07-21 00:51:14,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:14,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301288645] [2020-07-21 00:51:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:15,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 467 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [2020-07-21 00:51:15,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:16,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:17,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 518 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2020-07-21 00:51:18,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301288645] [2020-07-21 00:51:18,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:18,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 00:51:18,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546957351] [2020-07-21 00:51:18,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:18,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:18,206 INFO L87 Difference]: Start difference. First operand 70 states and 122 transitions. Second operand 18 states. [2020-07-21 00:51:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:18,531 INFO L93 Difference]: Finished difference Result 120 states and 219 transitions. [2020-07-21 00:51:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:18,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 327 [2020-07-21 00:51:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:18,537 INFO L225 Difference]: With dead ends: 120 [2020-07-21 00:51:18,537 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 00:51:18,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 622 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 00:51:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-07-21 00:51:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 00:51:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 167 transitions. [2020-07-21 00:51:18,565 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 167 transitions. Word has length 327 [2020-07-21 00:51:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:18,566 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 167 transitions. [2020-07-21 00:51:18,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 167 transitions. [2020-07-21 00:51:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 00:51:18,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:18,573 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:18,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:18,788 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash -301446619, now seen corresponding path program 8 times [2020-07-21 00:51:18,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:18,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956805005] [2020-07-21 00:51:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:18,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:18,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 00:51:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 494 proven. 483 refuted. 0 times theorem prover too weak. 3624 trivial. 0 not checked. [2020-07-21 00:51:19,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:19,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:19,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 500 proven. 505 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2020-07-21 00:51:20,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956805005] [2020-07-21 00:51:20,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:20,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-21 00:51:20,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629753238] [2020-07-21 00:51:20,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:51:20,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:51:20,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:51:20,521 INFO L87 Difference]: Start difference. First operand 90 states and 167 transitions. Second operand 14 states. [2020-07-21 00:51:20,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:20,674 INFO L93 Difference]: Finished difference Result 135 states and 267 transitions. [2020-07-21 00:51:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:51:20,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 287 [2020-07-21 00:51:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:20,681 INFO L225 Difference]: With dead ends: 135 [2020-07-21 00:51:20,681 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 00:51:20,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 550 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-21 00:51:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 00:51:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2020-07-21 00:51:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 00:51:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 181 transitions. [2020-07-21 00:51:20,698 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 181 transitions. Word has length 287 [2020-07-21 00:51:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:20,699 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 181 transitions. [2020-07-21 00:51:20,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:51:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 181 transitions. [2020-07-21 00:51:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 00:51:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:20,703 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:20,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:20,918 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1320340794, now seen corresponding path program 9 times [2020-07-21 00:51:20,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:20,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234939524] [2020-07-21 00:51:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:21,120 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 369 proven. 1029 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2020-07-21 00:51:21,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:22,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:22,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:23,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 375 proven. 1074 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2020-07-21 00:51:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234939524] [2020-07-21 00:51:24,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:24,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 00:51:24,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301812966] [2020-07-21 00:51:24,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:24,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:24,090 INFO L87 Difference]: Start difference. First operand 93 states and 181 transitions. Second operand 18 states. [2020-07-21 00:51:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:24,422 INFO L93 Difference]: Finished difference Result 183 states and 362 transitions. [2020-07-21 00:51:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:24,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 299 [2020-07-21 00:51:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:24,426 INFO L225 Difference]: With dead ends: 183 [2020-07-21 00:51:24,426 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 00:51:24,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 566 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 00:51:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-07-21 00:51:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 00:51:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2020-07-21 00:51:24,445 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 299 [2020-07-21 00:51:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2020-07-21 00:51:24,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2020-07-21 00:51:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 00:51:24,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:24,451 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:24,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:24,666 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 10 times [2020-07-21 00:51:24,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:24,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428962691] [2020-07-21 00:51:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:24,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:51:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-21 00:51:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 00:51:25,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-21 00:51:28,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428962691] [2020-07-21 00:51:28,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:28,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-21 00:51:28,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980321235] [2020-07-21 00:51:28,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 00:51:28,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 00:51:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-21 00:51:28,541 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand 28 states. [2020-07-21 00:51:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:29,027 INFO L93 Difference]: Finished difference Result 197 states and 342 transitions. [2020-07-21 00:51:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 00:51:29,027 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-21 00:51:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:29,034 INFO L225 Difference]: With dead ends: 197 [2020-07-21 00:51:29,035 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 00:51:29,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 534 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-07-21 00:51:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 00:51:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-07-21 00:51:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:51:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 267 transitions. [2020-07-21 00:51:29,069 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 267 transitions. Word has length 286 [2020-07-21 00:51:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:29,070 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 267 transitions. [2020-07-21 00:51:29,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 00:51:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 267 transitions. [2020-07-21 00:51:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-07-21 00:51:29,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:29,083 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 34, 26, 26, 26, 26, 26, 26, 26, 19, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:29,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:29,298 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2010709939, now seen corresponding path program 11 times [2020-07-21 00:51:29,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:29,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542808968] [2020-07-21 00:51:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:29,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:51:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7373 backedges. 408 proven. 1171 refuted. 0 times theorem prover too weak. 5794 trivial. 0 not checked. [2020-07-21 00:51:29,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:31,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:31,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7373 backedges. 409 proven. 1205 refuted. 0 times theorem prover too weak. 5759 trivial. 0 not checked. [2020-07-21 00:51:32,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542808968] [2020-07-21 00:51:32,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:32,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:51:32,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224649864] [2020-07-21 00:51:32,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:32,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:32,222 INFO L87 Difference]: Start difference. First operand 147 states and 267 transitions. Second operand 18 states. [2020-07-21 00:51:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:32,543 INFO L93 Difference]: Finished difference Result 253 states and 465 transitions. [2020-07-21 00:51:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:32,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 359 [2020-07-21 00:51:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:32,548 INFO L225 Difference]: With dead ends: 253 [2020-07-21 00:51:32,548 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 00:51:32,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 688 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:51:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 00:51:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 00:51:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:51:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 247 transitions. [2020-07-21 00:51:32,581 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 247 transitions. Word has length 359 [2020-07-21 00:51:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:32,581 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 247 transitions. [2020-07-21 00:51:32,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 247 transitions. [2020-07-21 00:51:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:32,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:32,591 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:32,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:32,806 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1540085876, now seen corresponding path program 12 times [2020-07-21 00:51:32,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:32,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363551409] [2020-07-21 00:51:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:33,076 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:51:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 00:51:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 742 proven. 144 refuted. 0 times theorem prover too weak. 4094 trivial. 0 not checked. [2020-07-21 00:51:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:33,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:33,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 739 proven. 165 refuted. 0 times theorem prover too weak. 4076 trivial. 0 not checked. [2020-07-21 00:51:34,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363551409] [2020-07-21 00:51:34,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:34,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2020-07-21 00:51:34,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011088907] [2020-07-21 00:51:34,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 00:51:34,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 00:51:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-21 00:51:34,650 INFO L87 Difference]: Start difference. First operand 147 states and 247 transitions. Second operand 14 states. [2020-07-21 00:51:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:34,836 INFO L93 Difference]: Finished difference Result 202 states and 343 transitions. [2020-07-21 00:51:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 00:51:34,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 298 [2020-07-21 00:51:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:34,842 INFO L225 Difference]: With dead ends: 202 [2020-07-21 00:51:34,842 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 00:51:34,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 574 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 00:51:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2020-07-21 00:51:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:51:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 254 transitions. [2020-07-21 00:51:34,882 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 254 transitions. Word has length 298 [2020-07-21 00:51:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:34,884 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 254 transitions. [2020-07-21 00:51:34,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 00:51:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 254 transitions. [2020-07-21 00:51:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-21 00:51:34,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:34,897 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:35,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:35,111 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:35,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2147227630, now seen corresponding path program 13 times [2020-07-21 00:51:35,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:35,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616517585] [2020-07-21 00:51:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:35,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:35,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 00:51:35,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 647 proven. 682 refuted. 0 times theorem prover too weak. 4568 trivial. 0 not checked. [2020-07-21 00:51:35,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:36,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 655 proven. 711 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2020-07-21 00:51:37,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616517585] [2020-07-21 00:51:37,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:37,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 16 [2020-07-21 00:51:37,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169480412] [2020-07-21 00:51:37,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:51:37,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:51:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:51:37,815 INFO L87 Difference]: Start difference. First operand 150 states and 254 transitions. Second operand 16 states. [2020-07-21 00:51:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:38,068 INFO L93 Difference]: Finished difference Result 199 states and 326 transitions. [2020-07-21 00:51:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:38,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 323 [2020-07-21 00:51:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:38,073 INFO L225 Difference]: With dead ends: 199 [2020-07-21 00:51:38,074 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 00:51:38,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 618 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2020-07-21 00:51:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 00:51:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 150. [2020-07-21 00:51:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 00:51:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 254 transitions. [2020-07-21 00:51:38,107 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 254 transitions. Word has length 323 [2020-07-21 00:51:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:38,108 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 254 transitions. [2020-07-21 00:51:38,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:51:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 254 transitions. [2020-07-21 00:51:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-21 00:51:38,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:38,119 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 34, 23, 23, 23, 23, 23, 23, 23, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:38,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:38,333 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 610962120, now seen corresponding path program 14 times [2020-07-21 00:51:38,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:38,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426344087] [2020-07-21 00:51:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:38,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:51:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 465 proven. 934 refuted. 0 times theorem prover too weak. 4498 trivial. 0 not checked. [2020-07-21 00:51:38,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:40,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:40,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:40,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5897 backedges. 464 proven. 970 refuted. 0 times theorem prover too weak. 4463 trivial. 0 not checked. [2020-07-21 00:51:41,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426344087] [2020-07-21 00:51:41,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:41,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:51:41,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564948580] [2020-07-21 00:51:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:41,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:41,355 INFO L87 Difference]: Start difference. First operand 150 states and 254 transitions. Second operand 18 states. [2020-07-21 00:51:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:41,649 INFO L93 Difference]: Finished difference Result 176 states and 288 transitions. [2020-07-21 00:51:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:41,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 323 [2020-07-21 00:51:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:41,656 INFO L225 Difference]: With dead ends: 176 [2020-07-21 00:51:41,657 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 00:51:41,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 616 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:51:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 00:51:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-07-21 00:51:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:51:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 243 transitions. [2020-07-21 00:51:41,686 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 243 transitions. Word has length 323 [2020-07-21 00:51:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:41,687 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 243 transitions. [2020-07-21 00:51:41,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 243 transitions. [2020-07-21 00:51:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:41,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:41,696 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:41,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:41,911 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash 476971754, now seen corresponding path program 15 times [2020-07-21 00:51:41,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:41,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967531518] [2020-07-21 00:51:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:42,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:51:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 272 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 00:51:42,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:43,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:43,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 814 proven. 296 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 00:51:44,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967531518] [2020-07-21 00:51:44,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:44,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 00:51:44,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113855557] [2020-07-21 00:51:44,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:51:44,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:51:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:51:44,191 INFO L87 Difference]: Start difference. First operand 147 states and 243 transitions. Second operand 16 states. [2020-07-21 00:51:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:44,423 INFO L93 Difference]: Finished difference Result 238 states and 392 transitions. [2020-07-21 00:51:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:44,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 00:51:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:44,429 INFO L225 Difference]: With dead ends: 238 [2020-07-21 00:51:44,429 INFO L226 Difference]: Without dead ends: 231 [2020-07-21 00:51:44,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:51:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-21 00:51:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 147. [2020-07-21 00:51:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 00:51:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 243 transitions. [2020-07-21 00:51:44,467 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 243 transitions. Word has length 298 [2020-07-21 00:51:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:44,468 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 243 transitions. [2020-07-21 00:51:44,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:51:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 243 transitions. [2020-07-21 00:51:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:44,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:44,481 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:44,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:44,695 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1448945942, now seen corresponding path program 16 times [2020-07-21 00:51:44,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:44,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439926659] [2020-07-21 00:51:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:44,969 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 00:51:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:51:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 960 proven. 313 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 00:51:45,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:46,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:46,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:47,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 955 proven. 353 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 00:51:48,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439926659] [2020-07-21 00:51:48,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:48,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:51:48,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241951625] [2020-07-21 00:51:48,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:48,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:48,003 INFO L87 Difference]: Start difference. First operand 147 states and 243 transitions. Second operand 18 states. [2020-07-21 00:51:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:48,382 INFO L93 Difference]: Finished difference Result 207 states and 330 transitions. [2020-07-21 00:51:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:48,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 00:51:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:48,388 INFO L225 Difference]: With dead ends: 207 [2020-07-21 00:51:48,388 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 00:51:48,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:51:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 00:51:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 124. [2020-07-21 00:51:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 00:51:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 201 transitions. [2020-07-21 00:51:48,413 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 201 transitions. Word has length 298 [2020-07-21 00:51:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:48,414 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 201 transitions. [2020-07-21 00:51:48,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 201 transitions. [2020-07-21 00:51:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:48,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:48,421 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:48,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:48,634 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash 500297194, now seen corresponding path program 17 times [2020-07-21 00:51:48,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:48,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169805167] [2020-07-21 00:51:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:48,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 00:51:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 526 proven. 560 refuted. 0 times theorem prover too weak. 3894 trivial. 0 not checked. [2020-07-21 00:51:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:50,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:50,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 528 proven. 582 refuted. 0 times theorem prover too weak. 3870 trivial. 0 not checked. [2020-07-21 00:51:51,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169805167] [2020-07-21 00:51:51,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:51,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2020-07-21 00:51:51,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391256260] [2020-07-21 00:51:51,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 00:51:51,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 00:51:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-07-21 00:51:51,124 INFO L87 Difference]: Start difference. First operand 124 states and 201 transitions. Second operand 16 states. [2020-07-21 00:51:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:51,382 INFO L93 Difference]: Finished difference Result 184 states and 288 transitions. [2020-07-21 00:51:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 00:51:51,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-07-21 00:51:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:51,386 INFO L225 Difference]: With dead ends: 184 [2020-07-21 00:51:51,387 INFO L226 Difference]: Without dead ends: 172 [2020-07-21 00:51:51,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 570 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-07-21 00:51:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-21 00:51:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2020-07-21 00:51:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 00:51:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 201 transitions. [2020-07-21 00:51:51,409 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 201 transitions. Word has length 298 [2020-07-21 00:51:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:51,410 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 201 transitions. [2020-07-21 00:51:51,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 00:51:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 201 transitions. [2020-07-21 00:51:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:51,416 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:51,416 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:51,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:51,632 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash -606289430, now seen corresponding path program 18 times [2020-07-21 00:51:51,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:51,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414192206] [2020-07-21 00:51:51,633 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:51,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:51:51,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:51:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 614 proven. 659 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 00:51:52,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:53,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:53,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 611 proven. 697 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 00:51:54,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414192206] [2020-07-21 00:51:54,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:54,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:51:54,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299131858] [2020-07-21 00:51:54,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:54,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:54,877 INFO L87 Difference]: Start difference. First operand 124 states and 201 transitions. Second operand 18 states. [2020-07-21 00:51:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:55,244 INFO L93 Difference]: Finished difference Result 158 states and 243 transitions. [2020-07-21 00:51:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:55,245 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 00:51:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:55,251 INFO L225 Difference]: With dead ends: 158 [2020-07-21 00:51:55,251 INFO L226 Difference]: Without dead ends: 141 [2020-07-21 00:51:55,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:51:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-21 00:51:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2020-07-21 00:51:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 00:51:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 125 transitions. [2020-07-21 00:51:55,268 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 125 transitions. Word has length 298 [2020-07-21 00:51:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:55,269 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 125 transitions. [2020-07-21 00:51:55,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 125 transitions. [2020-07-21 00:51:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-21 00:51:55,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:55,272 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:55,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:55,487 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -258866501, now seen corresponding path program 19 times [2020-07-21 00:51:55,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:55,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212056812] [2020-07-21 00:51:55,489 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:55,743 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:51:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:51:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 00:51:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:51:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 270 proven. 1062 refuted. 0 times theorem prover too weak. 3269 trivial. 0 not checked. [2020-07-21 00:51:55,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:51:57,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:58,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:59,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:59,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:59,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:59,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:51:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 280 proven. 1103 refuted. 0 times theorem prover too weak. 3218 trivial. 0 not checked. [2020-07-21 00:51:59,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212056812] [2020-07-21 00:51:59,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:51:59,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 00:51:59,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976127479] [2020-07-21 00:51:59,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:51:59,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:51:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:51:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:51:59,161 INFO L87 Difference]: Start difference. First operand 81 states and 125 transitions. Second operand 18 states. [2020-07-21 00:51:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:51:59,512 INFO L93 Difference]: Finished difference Result 180 states and 281 transitions. [2020-07-21 00:51:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:51:59,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 287 [2020-07-21 00:51:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:51:59,515 INFO L225 Difference]: With dead ends: 180 [2020-07-21 00:51:59,515 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 00:51:59,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 542 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 00:51:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 00:51:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-21 00:51:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 00:51:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-07-21 00:51:59,530 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 287 [2020-07-21 00:51:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:51:59,531 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-07-21 00:51:59,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:51:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-07-21 00:51:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:51:59,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:51:59,534 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:51:59,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:51:59,749 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:51:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:51:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -551621334, now seen corresponding path program 20 times [2020-07-21 00:51:59,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:51:59,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283970265] [2020-07-21 00:51:59,751 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:00,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 00:52:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 321 proven. 952 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2020-07-21 00:52:00,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:02,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:02,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:02,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:02,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:02,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:02,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 324 proven. 984 refuted. 0 times theorem prover too weak. 3672 trivial. 0 not checked. [2020-07-21 00:52:03,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283970265] [2020-07-21 00:52:03,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:03,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 00:52:03,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875310958] [2020-07-21 00:52:03,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 00:52:03,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:03,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 00:52:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 00:52:03,252 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 18 states. [2020-07-21 00:52:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:03,606 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2020-07-21 00:52:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 00:52:03,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 298 [2020-07-21 00:52:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:03,610 INFO L225 Difference]: With dead ends: 105 [2020-07-21 00:52:03,611 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 00:52:03,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 00:52:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 00:52:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-21 00:52:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 00:52:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-07-21 00:52:03,626 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 298 [2020-07-21 00:52:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:03,626 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-07-21 00:52:03,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 00:52:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-07-21 00:52:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-07-21 00:52:03,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:52:03,630 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 33, 21, 21, 21, 21, 21, 21, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 00:52:03,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:03,845 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:52:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:52:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2133540566, now seen corresponding path program 21 times [2020-07-21 00:52:03,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:52:03,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277795522] [2020-07-21 00:52:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:04,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 00:52:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:52:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 00:52:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:52:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 328 proven. 1119 refuted. 0 times theorem prover too weak. 3533 trivial. 0 not checked. [2020-07-21 00:52:04,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 00:52:06,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:06,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:07,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 00:52:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4980 backedges. 322 proven. 1176 refuted. 0 times theorem prover too weak. 3482 trivial. 0 not checked. [2020-07-21 00:52:08,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277795522] [2020-07-21 00:52:08,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 00:52:08,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 00:52:08,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122250539] [2020-07-21 00:52:08,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 00:52:08,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:52:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 00:52:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 00:52:08,077 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 20 states. [2020-07-21 00:52:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:52:08,524 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-07-21 00:52:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 00:52:08,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 298 [2020-07-21 00:52:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:52:08,526 INFO L225 Difference]: With dead ends: 138 [2020-07-21 00:52:08,527 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 00:52:08,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 00:52:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 00:52:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 00:52:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 00:52:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 00:52:08,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 298 [2020-07-21 00:52:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:52:08,543 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 00:52:08,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 00:52:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 00:52:08,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 00:52:08,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:52:08,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 00:52:09,358 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 40 [2020-07-21 00:52:12,968 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 414 DAG size of output: 213 [2020-07-21 00:52:14,877 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 399 DAG size of output: 209 [2020-07-21 00:52:15,027 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:15,468 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-21 00:52:15,717 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:17,594 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:52:17,950 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:52:19,225 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 366 DAG size of output: 189 [2020-07-21 00:52:19,645 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:52:21,378 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:52:23,146 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 399 DAG size of output: 209 [2020-07-21 00:52:23,294 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:25,171 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:52:25,547 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-21 00:52:27,283 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 404 DAG size of output: 211 [2020-07-21 00:52:28,082 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 144 [2020-07-21 00:52:30,004 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 414 DAG size of output: 213 [2020-07-21 00:52:31,422 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 387 DAG size of output: 197 [2020-07-21 00:52:33,187 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:52:33,339 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:35,264 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:52:35,679 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-21 00:52:37,160 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 382 DAG size of output: 202 [2020-07-21 00:52:38,665 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 392 DAG size of output: 199 [2020-07-21 00:52:40,545 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:52:41,956 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 387 DAG size of output: 197 [2020-07-21 00:52:43,786 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 414 DAG size of output: 213 [2020-07-21 00:52:44,808 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 350 DAG size of output: 175 [2020-07-21 00:52:46,515 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:52:46,887 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:52:48,526 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 403 DAG size of output: 211 [2020-07-21 00:52:50,181 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 408 DAG size of output: 213 [2020-07-21 00:52:51,959 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 425 DAG size of output: 162 [2020-07-21 00:52:52,975 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 350 DAG size of output: 175 [2020-07-21 00:52:53,166 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:54,982 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 414 DAG size of output: 213 [2020-07-21 00:52:55,128 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:52:55,517 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:52:57,106 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:52:57,421 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 104 [2020-07-21 00:52:58,759 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 370 DAG size of output: 188 [2020-07-21 00:52:59,212 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 175 [2020-07-21 00:53:00,777 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 402 DAG size of output: 201 [2020-07-21 00:53:02,621 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:04,484 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:06,078 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 402 DAG size of output: 201 [2020-07-21 00:53:06,223 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 00:53:07,867 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:09,461 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:09,602 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:53:11,058 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:11,351 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 104 [2020-07-21 00:53:12,951 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 418 DAG size of output: 215 [2020-07-21 00:53:14,590 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:14,934 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:53:15,076 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 71 [2020-07-21 00:53:16,710 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:18,402 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:18,775 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:53:18,917 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:53:19,238 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 116 [2020-07-21 00:53:20,714 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:22,340 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:22,483 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 73 [2020-07-21 00:53:22,818 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:53:23,365 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 141 [2020-07-21 00:53:24,860 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 409 DAG size of output: 211 [2020-07-21 00:53:26,489 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:27,902 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 399 DAG size of output: 209 [2020-07-21 00:53:28,046 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:53:28,382 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 114 [2020-07-21 00:53:29,976 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:31,483 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:31,818 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 114 [2020-07-21 00:53:32,343 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 131 [2020-07-21 00:53:32,446 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 60 [2020-07-21 00:53:34,078 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:35,499 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 404 DAG size of output: 209 [2020-07-21 00:53:35,642 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-07-21 00:53:37,271 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 419 DAG size of output: 213 [2020-07-21 00:53:38,765 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 409 DAG size of output: 211 [2020-07-21 00:53:45,172 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 416 DAG size of output: 45 [2020-07-21 00:53:45,200 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 00:53:45,200 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:53:45,200 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 00:53:45,200 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 00:53:45,200 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 00:53:45,200 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-21 00:53:45,201 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (<= 2 |fibo_#in~n|)) [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse7 (<= 3 |fibo_#in~n|)) (.cse8 (<= |fibo_#in~n| 3)) (.cse12 (= |fibo_#t~ret0| 1)) (.cse10 (<= |fibo_#in~n| 2)) (.cse4 (<= fibo_~n |fibo_#in~n|)) (.cse5 (<= |fibo_#in~n| fibo_~n))) (let ((.cse0 (<= 4 |fibo_#in~n|)) (.cse6 (<= |fibo_#in~n| 4)) (.cse9 (and .cse4 .cse5 (= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|))) (.cse1 (and .cse12 .cse10)) (.cse11 (and .cse4 .cse5 (<= 7 |fibo_#in~n|))) (.cse3 (<= 5 |fibo_#in~n|)) (.cse2 (and .cse12 .cse7 .cse8))) (and (or .cse0 .cse1 .cse2) (or (and .cse3 .cse4 .cse5 (<= |fibo_#in~n| 5)) (and .cse0 .cse4 .cse5 .cse6) (and .cse4 .cse5 .cse7 .cse8) .cse9 (and .cse4 .cse10 .cse5 (<= 2 |fibo_#in~n|)) .cse11) (or (<= |fibo_#in~n| 6) (<= 8 |fibo_#in~n|) (= |fibo_#t~ret0| 8)) (or (and (= |fibo_#t~ret0| 2) .cse6) .cse9 .cse1 .cse11 (and .cse3 (= |fibo_#t~ret0| 3)) .cse2)))) [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-21 00:53:45,202 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-21 00:53:45,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:53:45 BoogieIcfgContainer [2020-07-21 00:53:45,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:53:45,210 INFO L168 Benchmark]: Toolchain (without parser) took 177266.14 ms. Allocated memory was 144.7 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 101.5 MB in the beginning and 991.6 MB in the end (delta: -890.1 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2020-07-21 00:53:45,210 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 144.7 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 00:53:45,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.47 ms. Allocated memory is still 144.7 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:45,211 INFO L168 Benchmark]: Boogie Preprocessor took 44.12 ms. Allocated memory is still 144.7 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:45,211 INFO L168 Benchmark]: RCFGBuilder took 417.05 ms. Allocated memory was 144.7 MB in the beginning and 205.0 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 173.1 MB in the end (delta: -82.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:53:45,212 INFO L168 Benchmark]: TraceAbstraction took 176368.58 ms. Allocated memory was 205.0 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 172.1 MB in the beginning and 991.6 MB in the end (delta: -819.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2020-07-21 00:53:45,213 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 144.7 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.47 ms. Allocated memory is still 144.7 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.12 ms. Allocated memory is still 144.7 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 417.05 ms. Allocated memory was 144.7 MB in the beginning and 205.0 MB in the end (delta: 60.3 MB). Free memory was 90.2 MB in the beginning and 173.1 MB in the end (delta: -82.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 176368.58 ms. Allocated memory was 205.0 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 172.1 MB in the beginning and 991.6 MB in the end (delta: -819.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 79.8s, OverallIterations: 29, TraceHistogramMax: 77, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 96.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 758 SDtfs, 979 SDslu, 3383 SDs, 0 SdLazy, 4002 SolverSat, 1385 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13590 GetRequests, 12762 SyntacticMatches, 302 SemanticMatches, 526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 29 MinimizatonAttempts, 620 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 284 PreInvPairs, 15282 NumberOfFragments, 185 HoareAnnotationTreeSize, 284 FomulaSimplifications, 9854173586 FormulaSimplificationTreeSizeReduction, 90.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6836558 FormulaSimplificationTreeSizeReductionInter, 6.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 59.6s InterpolantComputationTime, 6747 NumberOfCodeBlocks, 3120 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 13411 ConstructedInterpolants, 0 QuantifiedInterpolants, 6052662 SizeOfPredicates, 167 NumberOfNonLiveVariables, 6935 ConjunctsInSsa, 510 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 200245/237512 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...