/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:09:30,853 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:09:30,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:09:30,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:09:30,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:09:30,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:09:30,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:09:30,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:09:30,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:09:30,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:09:30,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:09:30,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:09:30,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:09:30,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:09:30,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:09:30,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:09:30,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:09:30,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:09:30,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:09:30,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:09:30,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:09:30,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:09:30,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:09:30,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:09:30,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:09:30,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:09:30,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:09:30,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:09:30,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:09:30,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:09:30,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:09:30,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:09:30,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:09:30,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:09:30,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:09:30,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:09:30,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:09:30,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:09:30,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:09:30,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:09:30,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:09:30,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:09:30,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:09:30,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:09:30,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:09:30,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:30,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:09:30,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:09:30,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:09:31,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:09:31,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:09:31,263 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:09:31,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:09:31,265 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:09:31,266 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 21:09:31,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd958bc4/ab00ab260b9c43b19a9aa7a73c9b816b/FLAGccee05f2b [2020-07-20 21:09:31,872 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:09:31,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 21:09:31,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd958bc4/ab00ab260b9c43b19a9aa7a73c9b816b/FLAGccee05f2b [2020-07-20 21:09:32,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd958bc4/ab00ab260b9c43b19a9aa7a73c9b816b [2020-07-20 21:09:32,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:09:32,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:09:32,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:09:32,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:09:32,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:09:32,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1340591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32, skipping insertion in model container [2020-07-20 21:09:32,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:09:32,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:09:32,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:09:32,481 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:09:32,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:09:32,510 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:09:32,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32 WrapperNode [2020-07-20 21:09:32,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:09:32,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:09:32,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:09:32,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:09:32,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... [2020-07-20 21:09:32,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:09:32,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:09:32,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:09:32,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:09:32,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:09:32,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:09:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:09:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 21:09:32,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:09:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:09:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:09:32,689 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 21:09:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:09:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:09:32,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:09:32,889 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:09:32,889 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:09:32,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:32 BoogieIcfgContainer [2020-07-20 21:09:32,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:09:32,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:09:32,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:09:32,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:09:32,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:09:32" (1/3) ... [2020-07-20 21:09:32,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ea126c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:32, skipping insertion in model container [2020-07-20 21:09:32,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:32" (2/3) ... [2020-07-20 21:09:32,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ea126c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:32, skipping insertion in model container [2020-07-20 21:09:32,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:32" (3/3) ... [2020-07-20 21:09:32,903 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-20 21:09:32,916 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:09:32,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:09:32,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:09:32,996 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:09:32,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:09:32,997 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:09:32,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:09:33,000 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:09:33,000 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:09:33,000 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:09:33,000 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:09:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 21:09:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:09:33,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:33,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:33,044 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-20 21:09:33,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:33,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720316229] [2020-07-20 21:09:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:33,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:09:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:09:33,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:09:33,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720316229] [2020-07-20 21:09:33,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:09:33,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:09:33,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821105262] [2020-07-20 21:09:33,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:09:33,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:09:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:09:33,258 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 21:09:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:33,370 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-20 21:09:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:09:33,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 21:09:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:33,382 INFO L225 Difference]: With dead ends: 33 [2020-07-20 21:09:33,383 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 21:09:33,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:09:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 21:09:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 21:09:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:09:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:09:33,432 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 21:09:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:33,433 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:09:33,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:09:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:09:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:09:33,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:33,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:33,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:33,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-20 21:09:33,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:33,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307867792] [2020-07-20 21:09:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:33,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:33,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 21:09:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:09:33,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:09:33,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307867792] [2020-07-20 21:09:33,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:09:33,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:09:33,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930586805] [2020-07-20 21:09:33,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:09:33,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:09:33,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:09:33,726 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 21:09:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:33,799 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 21:09:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:09:33,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:09:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:33,802 INFO L225 Difference]: With dead ends: 27 [2020-07-20 21:09:33,802 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 21:09:33,803 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 [2020-07-20 21:09:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 21:09:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 21:09:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 21:09:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 21:09:33,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 21:09:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:33,813 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 21:09:33,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:09:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 21:09:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:09:33,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:33,816 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] [2020-07-20 21:09:34,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:34,029 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-20 21:09:34,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:34,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431625536] [2020-07-20 21:09:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:34,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:09:34,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:09:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:09:34,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:34,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:34,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:09:34,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431625536] [2020-07-20 21:09:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:34,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:09:34,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22717654] [2020-07-20 21:09:34,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:09:34,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:09:34,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:09:34,363 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 21:09:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:34,472 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 21:09:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:09:34,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 21:09:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:34,475 INFO L225 Difference]: With dead ends: 32 [2020-07-20 21:09:34,476 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 21:09:34,476 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 [2020-07-20 21:09:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 21:09:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 21:09:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:09:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:09:34,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 21:09:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:34,487 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:09:34,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:09:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:09:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:09:34,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:34,489 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] [2020-07-20 21:09:34,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:34,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-20 21:09:34,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:34,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955085137] [2020-07-20 21:09:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:34,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:34,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 21:09:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 21:09:34,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:34,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:09:34,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955085137] [2020-07-20 21:09:34,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:34,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 21:09:34,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826128168] [2020-07-20 21:09:34,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 21:09:34,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 21:09:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:09:34,972 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 21:09:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:35,051 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 21:09:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:09:35,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 21:09:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:35,054 INFO L225 Difference]: With dead ends: 37 [2020-07-20 21:09:35,054 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 21:09:35,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:09:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 21:09:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 21:09:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 21:09:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 21:09:35,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 21:09:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:35,066 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 21:09:35,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 21:09:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 21:09:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 21:09:35,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:35,068 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] [2020-07-20 21:09:35,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:35,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:35,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:35,284 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-20 21:09:35,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:35,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674708840] [2020-07-20 21:09:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:35,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:09:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 21:09:35,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:35,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:35,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:09:35,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674708840] [2020-07-20 21:09:35,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:35,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:09:35,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311180010] [2020-07-20 21:09:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:09:35,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:09:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:09:35,740 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 21:09:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:35,874 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 21:09:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:09:35,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 21:09:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:35,877 INFO L225 Difference]: With dead ends: 42 [2020-07-20 21:09:35,877 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 21:09:35,883 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 [2020-07-20 21:09:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 21:09:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 21:09:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:09:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:09:35,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 21:09:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:35,905 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:09:35,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:09:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:09:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 21:09:35,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:35,908 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] [2020-07-20 21:09:36,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,109 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-20 21:09:36,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:36,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038490237] [2020-07-20 21:09:36,111 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:36,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:09:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 21:09:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:36,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:36,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 21:09:36,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038490237] [2020-07-20 21:09:36,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:36,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 21:09:36,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920137539] [2020-07-20 21:09:36,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 21:09:36,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 21:09:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:09:36,551 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 21:09:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:36,713 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 21:09:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:09:36,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 21:09:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:36,716 INFO L225 Difference]: With dead ends: 47 [2020-07-20 21:09:36,716 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 21:09:36,717 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 [2020-07-20 21:09:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 21:09:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 21:09:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 21:09:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 21:09:36,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 21:09:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:36,730 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 21:09:36,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 21:09:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 21:09:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 21:09:36,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:36,733 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] [2020-07-20 21:09:36,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,949 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:36,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-20 21:09:36,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:36,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965966870] [2020-07-20 21:09:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:36,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:36,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:09:36,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 21:09:37,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:37,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:37,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:37,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:37,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:37,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 21:09:37,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965966870] [2020-07-20 21:09:37,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:37,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:09:37,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575467340] [2020-07-20 21:09:37,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:09:37,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:37,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:09:37,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:09:37,596 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 21:09:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:37,773 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 21:09:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:09:37,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 21:09:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:37,780 INFO L225 Difference]: With dead ends: 52 [2020-07-20 21:09:37,781 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:09:37,783 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 [2020-07-20 21:09:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:09:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 21:09:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:09:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:09:37,801 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 21:09:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:37,801 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:09:37,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:09:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:09:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 21:09:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:37,806 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:38,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:38,021 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-20 21:09:38,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:38,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126676633] [2020-07-20 21:09:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:38,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:38,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 21:09:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-20 21:09:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:38,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:38,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:38,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:38,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 21:09:38,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126676633] [2020-07-20 21:09:38,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:38,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 21:09:38,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846869562] [2020-07-20 21:09:38,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 21:09:38,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 21:09:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:09:38,755 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 21:09:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:38,943 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 21:09:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:09:38,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 21:09:38,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:38,949 INFO L225 Difference]: With dead ends: 57 [2020-07-20 21:09:38,949 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 21:09:38,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:09:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 21:09:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 21:09:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 21:09:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 21:09:38,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-20 21:09:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:38,965 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 21:09:38,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 21:09:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 21:09:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 21:09:38,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:38,973 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:39,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:39,187 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-20 21:09:39,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:39,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022987222] [2020-07-20 21:09:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:39,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:09:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-20 21:09:39,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:40,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:40,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:40,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:40,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-20 21:09:40,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022987222] [2020-07-20 21:09:40,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:40,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:09:40,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431904983] [2020-07-20 21:09:40,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:09:40,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:09:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:09:40,578 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 21:09:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:40,771 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 21:09:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:09:40,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-20 21:09:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:40,775 INFO L225 Difference]: With dead ends: 62 [2020-07-20 21:09:40,775 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 21:09:40,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:09:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 21:09:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 21:09:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:09:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:09:40,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-20 21:09:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:40,790 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:09:40,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:09:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:09:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 21:09:40,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:40,794 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:41,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:41,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-20 21:09:41,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:41,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239662906] [2020-07-20 21:09:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:41,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:41,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:41,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:09:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-20 21:09:41,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:41,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:41,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:41,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:41,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:41,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:41,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:42,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:42,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 21:09:42,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239662906] [2020-07-20 21:09:42,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:42,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 21:09:42,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743308545] [2020-07-20 21:09:42,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:09:42,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:09:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:09:42,081 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 21:09:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:42,297 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 21:09:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 21:09:42,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-20 21:09:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:42,300 INFO L225 Difference]: With dead ends: 67 [2020-07-20 21:09:42,301 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 21:09:42,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:09:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 21:09:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 21:09:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 21:09:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 21:09:42,315 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-20 21:09:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:42,316 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 21:09:42,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:09:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 21:09:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 21:09:42,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:42,321 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] [2020-07-20 21:09:42,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:42,536 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-20 21:09:42,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:42,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419996976] [2020-07-20 21:09:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:42,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:09:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 21:09:42,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:43,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:43,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 21:09:44,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419996976] [2020-07-20 21:09:44,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:44,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:09:44,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992144421] [2020-07-20 21:09:44,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:09:44,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:09:44,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:09:44,665 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 21:09:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:44,949 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 21:09:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:09:44,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 21:09:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:44,955 INFO L225 Difference]: With dead ends: 72 [2020-07-20 21:09:44,956 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 21:09:44,957 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 [2020-07-20 21:09:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 21:09:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 21:09:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:09:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:09:44,971 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 21:09:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:44,972 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:09:44,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:09:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:09:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 21:09:44,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:44,977 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] [2020-07-20 21:09:45,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:45,191 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-20 21:09:45,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:45,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466155743] [2020-07-20 21:09:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:45,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:45,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 21:09:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 21:09:45,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:46,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:46,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:46,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 21:09:47,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466155743] [2020-07-20 21:09:47,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:47,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 21:09:47,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889656904] [2020-07-20 21:09:47,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 21:09:47,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 21:09:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 21:09:47,381 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 21:09:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:47,622 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 21:09:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:09:47,623 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-20 21:09:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:47,626 INFO L225 Difference]: With dead ends: 77 [2020-07-20 21:09:47,626 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 21:09:47,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 21:09:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 21:09:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 21:09:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 21:09:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 21:09:47,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 21:09:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:47,662 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 21:09:47,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 21:09:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 21:09:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 21:09:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:47,672 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:47,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:47,886 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash 956910434, now seen corresponding path program 6 times [2020-07-20 21:09:47,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:47,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558597632] [2020-07-20 21:09:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:48,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:09:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1385 refuted. 0 times theorem prover too weak. 5484 trivial. 0 not checked. [2020-07-20 21:09:48,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:49,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:50,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1436 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2020-07-20 21:09:51,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558597632] [2020-07-20 21:09:51,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:51,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 21:09:51,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152717013] [2020-07-20 21:09:51,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:09:51,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:09:51,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:09:51,067 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 21:09:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:51,419 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 21:09:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:09:51,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 351 [2020-07-20 21:09:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:51,424 INFO L225 Difference]: With dead ends: 82 [2020-07-20 21:09:51,424 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 21:09:51,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 671 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:09:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 21:09:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 21:09:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 21:09:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 21:09:51,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 351 [2020-07-20 21:09:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:51,441 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 21:09:51,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:09:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 21:09:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-07-20 21:09:51,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:51,447 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 77, 44, 44, 44, 44, 44, 44, 44, 33, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:51,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:51,660 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2029957590, now seen corresponding path program 6 times [2020-07-20 21:09:51,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:51,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226659176] [2020-07-20 21:09:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:51,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:51,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:09:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2720 refuted. 0 times theorem prover too weak. 19163 trivial. 0 not checked. [2020-07-20 21:09:52,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:09:54,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:54,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:54,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:09:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2777 refuted. 0 times theorem prover too weak. 19106 trivial. 0 not checked. [2020-07-20 21:09:55,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226659176] [2020-07-20 21:09:55,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:09:55,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 21:09:55,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067099609] [2020-07-20 21:09:55,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 21:09:55,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:09:55,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 21:09:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 21:09:55,825 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 21:09:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:09:56,094 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 21:09:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:09:56,095 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 618 [2020-07-20 21:09:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:09:56,099 INFO L225 Difference]: With dead ends: 87 [2020-07-20 21:09:56,099 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 21:09:56,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1204 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 21:09:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 21:09:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 21:09:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 21:09:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 21:09:56,135 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 618 [2020-07-20 21:09:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:09:56,138 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 21:09:56,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 21:09:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 21:09:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 21:09:56,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:56,147 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:56,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:56,361 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:56,362 INFO L82 PathProgramCache]: Analyzing trace with hash 341063264, now seen corresponding path program 7 times [2020-07-20 21:09:56,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:56,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442471279] [2020-07-20 21:09:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:56,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:09:56,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:09:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:09:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:09:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4497 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-20 21:09:57,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:00,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:01,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:01,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4567 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-20 21:10:02,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442471279] [2020-07-20 21:10:02,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:02,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 21:10:02,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562037950] [2020-07-20 21:10:02,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 21:10:02,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:02,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 21:10:02,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 21:10:02,940 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 21:10:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:03,262 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 21:10:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:10:03,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-20 21:10:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:03,268 INFO L225 Difference]: With dead ends: 92 [2020-07-20 21:10:03,268 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 21:10:03,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 21:10:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 21:10:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 21:10:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 21:10:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 21:10:03,293 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-20 21:10:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:03,297 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 21:10:03,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 21:10:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 21:10:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2020-07-20 21:10:03,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:03,307 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 104, 60, 60, 60, 60, 60, 60, 60, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:03,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:03,521 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash 847273596, now seen corresponding path program 7 times [2020-07-20 21:10:03,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:03,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991692165] [2020-07-20 21:10:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:03,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:10:03,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:10:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4412 refuted. 0 times theorem prover too weak. 36393 trivial. 0 not checked. [2020-07-20 21:10:04,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:07,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:07,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:08,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:08,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:08,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:08,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4489 refuted. 0 times theorem prover too weak. 36316 trivial. 0 not checked. [2020-07-20 21:10:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991692165] [2020-07-20 21:10:09,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:09,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 21:10:09,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948787757] [2020-07-20 21:10:09,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:10:09,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:10:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:10:09,968 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-20 21:10:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:10,531 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 21:10:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:10:10,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 837 [2020-07-20 21:10:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:10,539 INFO L225 Difference]: With dead ends: 97 [2020-07-20 21:10:10,539 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:10:10,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1638 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:10:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:10:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 21:10:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 21:10:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 21:10:10,561 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 837 [2020-07-20 21:10:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:10,563 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 21:10:10,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:10:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 21:10:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-07-20 21:10:10,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:10,575 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 72, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:10,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:10,790 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1176387739, now seen corresponding path program 8 times [2020-07-20 21:10:10,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:10,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707886541] [2020-07-20 21:10:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:11,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:10:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:10:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5431 refuted. 0 times theorem prover too weak. 46743 trivial. 0 not checked. [2020-07-20 21:10:11,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:15,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:17,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:17,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:17,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:18,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5523 refuted. 0 times theorem prover too weak. 46651 trivial. 0 not checked. [2020-07-20 21:10:19,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707886541] [2020-07-20 21:10:19,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:19,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:10:19,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202547436] [2020-07-20 21:10:19,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:10:19,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:19,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:10:19,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:10:19,334 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-20 21:10:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:19,868 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 21:10:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:10:19,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 936 [2020-07-20 21:10:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:19,875 INFO L225 Difference]: With dead ends: 102 [2020-07-20 21:10:19,875 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 21:10:19,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1833 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:10:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 21:10:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 21:10:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:10:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 21:10:19,896 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 936 [2020-07-20 21:10:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:19,897 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 21:10:19,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:10:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 21:10:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-20 21:10:19,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:19,924 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:20,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:20,140 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -263746810, now seen corresponding path program 8 times [2020-07-20 21:10:20,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:20,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746518595] [2020-07-20 21:10:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:20,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:10:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 3154 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:10:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1790 proven. 10673 refuted. 0 times theorem prover too weak. 158987 trivial. 0 not checked. [2020-07-20 21:10:22,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:27,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:27,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:30,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:30,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:31,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:32,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:32,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:32,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:32,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:32,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:33,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1800 proven. 10755 refuted. 0 times theorem prover too weak. 158895 trivial. 0 not checked. [2020-07-20 21:10:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746518595] [2020-07-20 21:10:34,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:34,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:10:34,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602434788] [2020-07-20 21:10:34,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:10:34,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:10:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:10:34,190 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-20 21:10:34,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:34,857 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-20 21:10:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:10:34,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-20 21:10:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:34,865 INFO L225 Difference]: With dead ends: 245 [2020-07-20 21:10:34,865 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 21:10:34,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:10:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 21:10:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 21:10:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 21:10:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-20 21:10:34,892 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1689 [2020-07-20 21:10:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:34,893 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-20 21:10:34,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:10:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-20 21:10:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-20 21:10:34,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:34,907 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:35,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:35,122 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353203, now seen corresponding path program 9 times [2020-07-20 21:10:35,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:35,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346162173] [2020-07-20 21:10:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:35,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:10:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:10:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1347 proven. 6076 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked. [2020-07-20 21:10:36,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:40,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:42,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:43,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:44,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:45,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:45,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:45,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1355 proven. 6160 refuted. 0 times theorem prover too weak. 56266 trivial. 0 not checked. [2020-07-20 21:10:45,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346162173] [2020-07-20 21:10:45,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:45,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:10:45,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060804530] [2020-07-20 21:10:45,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:10:45,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:10:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:10:45,650 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-20 21:10:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:46,137 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2020-07-20 21:10:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:10:46,144 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1035 [2020-07-20 21:10:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:46,147 INFO L225 Difference]: With dead ends: 107 [2020-07-20 21:10:46,148 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 21:10:46,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 2030 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:10:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 21:10:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-20 21:10:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 21:10:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-07-20 21:10:46,164 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 1035 [2020-07-20 21:10:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:46,165 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-07-20 21:10:46,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:10:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-07-20 21:10:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-20 21:10:46,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:46,175 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:46,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:46,390 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 10 times [2020-07-20 21:10:46,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:46,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758656445] [2020-07-20 21:10:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:46,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:10:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:46,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:10:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4349 refuted. 0 times theorem prover too weak. 35140 trivial. 0 not checked. [2020-07-20 21:10:47,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:10:51,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:53,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:53,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:54,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:54,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:54,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:10:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-20 21:10:55,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758656445] [2020-07-20 21:10:55,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:10:55,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:10:55,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275979364] [2020-07-20 21:10:55,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:10:55,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:10:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:10:55,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:10:55,747 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 22 states. [2020-07-20 21:10:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:10:56,164 INFO L93 Difference]: Finished difference Result 117 states and 160 transitions. [2020-07-20 21:10:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:10:56,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-20 21:10:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:10:56,169 INFO L225 Difference]: With dead ends: 117 [2020-07-20 21:10:56,169 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 21:10:56,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:10:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 21:10:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-07-20 21:10:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 21:10:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-20 21:10:56,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 830 [2020-07-20 21:10:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:10:56,184 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-20 21:10:56,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:10:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-20 21:10:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-20 21:10:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:10:56,194 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:10:56,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:56,409 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:10:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:10:56,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-20 21:10:56,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:10:56,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842744226] [2020-07-20 21:10:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:10:57,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:10:57,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:10:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-20 21:10:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:10:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 21:10:58,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 21:11:12,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842744226] [2020-07-20 21:11:12,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:12,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 21:11:12,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715732183] [2020-07-20 21:11:12,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 21:11:12,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 21:11:12,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 21:11:12,198 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-20 21:11:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:13,440 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-20 21:11:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 21:11:13,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-20 21:11:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:13,449 INFO L225 Difference]: With dead ends: 167 [2020-07-20 21:11:13,449 INFO L226 Difference]: Without dead ends: 160 [2020-07-20 21:11:13,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 21:11:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-20 21:11:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-20 21:11:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-20 21:11:13,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-20 21:11:13,483 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-20 21:11:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:13,484 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-20 21:11:13,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 21:11:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-20 21:11:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-07-20 21:11:13,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:13,499 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 88, 59, 59, 59, 59, 59, 59, 59, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:13,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:13,714 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1032666323, now seen corresponding path program 12 times [2020-07-20 21:11:13,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:13,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548920682] [2020-07-20 21:11:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:14,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:11:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1114 proven. 3376 refuted. 0 times theorem prover too weak. 34266 trivial. 0 not checked. [2020-07-20 21:11:14,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:18,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:18,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:19,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:19,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:19,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:20,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1122 proven. 3421 refuted. 0 times theorem prover too weak. 34213 trivial. 0 not checked. [2020-07-20 21:11:21,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548920682] [2020-07-20 21:11:21,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:21,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:11:21,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400992074] [2020-07-20 21:11:21,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:11:21,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:11:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:11:21,503 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 20 states. [2020-07-20 21:11:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:21,850 INFO L93 Difference]: Finished difference Result 193 states and 323 transitions. [2020-07-20 21:11:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:11:21,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 809 [2020-07-20 21:11:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:21,858 INFO L225 Difference]: With dead ends: 193 [2020-07-20 21:11:21,858 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 21:11:21,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1624 GetRequests, 1584 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:11:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 21:11:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2020-07-20 21:11:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:11:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 226 transitions. [2020-07-20 21:11:21,890 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 226 transitions. Word has length 809 [2020-07-20 21:11:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:21,890 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 226 transitions. [2020-07-20 21:11:21,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:11:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 226 transitions. [2020-07-20 21:11:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2020-07-20 21:11:21,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:21,906 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 88, 65, 65, 65, 65, 65, 65, 65, 43, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:22,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:22,121 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash -202188753, now seen corresponding path program 13 times [2020-07-20 21:11:22,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:22,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434076252] [2020-07-20 21:11:22,122 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 [2020-07-20 21:11:22,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:11:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1096 proven. 4474 refuted. 0 times theorem prover too weak. 40638 trivial. 0 not checked. [2020-07-20 21:11:23,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:27,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:27,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:29,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:30,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:30,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:30,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1099 proven. 4541 refuted. 0 times theorem prover too weak. 40568 trivial. 0 not checked. [2020-07-20 21:11:31,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434076252] [2020-07-20 21:11:31,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:31,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:11:31,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932249879] [2020-07-20 21:11:31,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:11:31,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:31,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:11:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:11:31,704 INFO L87 Difference]: Start difference. First operand 134 states and 226 transitions. Second operand 22 states. [2020-07-20 21:11:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:32,305 INFO L93 Difference]: Finished difference Result 295 states and 557 transitions. [2020-07-20 21:11:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:11:32,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 881 [2020-07-20 21:11:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:32,312 INFO L225 Difference]: With dead ends: 295 [2020-07-20 21:11:32,313 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 21:11:32,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1769 GetRequests, 1724 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:11:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 21:11:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 21:11:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 21:11:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 212 transitions. [2020-07-20 21:11:32,354 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 212 transitions. Word has length 881 [2020-07-20 21:11:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:32,354 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 212 transitions. [2020-07-20 21:11:32,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:11:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 212 transitions. [2020-07-20 21:11:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 21:11:32,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:32,369 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:32,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:32,586 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash -242105596, now seen corresponding path program 14 times [2020-07-20 21:11:32,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:32,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389196258] [2020-07-20 21:11:32,588 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 [2020-07-20 21:11:33,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:11:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2105 proven. 2175 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-20 21:11:33,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:37,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:37,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:38,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:39,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2105 proven. 2228 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-20 21:11:40,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389196258] [2020-07-20 21:11:40,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:40,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:11:40,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752118097] [2020-07-20 21:11:40,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:11:40,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:11:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:11:40,232 INFO L87 Difference]: Start difference. First operand 134 states and 212 transitions. Second operand 20 states. [2020-07-20 21:11:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:40,659 INFO L93 Difference]: Finished difference Result 163 states and 248 transitions. [2020-07-20 21:11:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:11:40,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-20 21:11:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:40,664 INFO L225 Difference]: With dead ends: 163 [2020-07-20 21:11:40,664 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 21:11:40,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:11:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 21:11:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2020-07-20 21:11:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 21:11:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 224 transitions. [2020-07-20 21:11:40,691 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 224 transitions. Word has length 773 [2020-07-20 21:11:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:40,691 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 224 transitions. [2020-07-20 21:11:40,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:11:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 224 transitions. [2020-07-20 21:11:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-07-20 21:11:40,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:40,709 INFO L422 BasicCegarLoop]: trace histogram [123, 123, 89, 61, 61, 61, 61, 61, 61, 61, 34, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:40,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:40,925 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1213697935, now seen corresponding path program 15 times [2020-07-20 21:11:40,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:40,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824352415] [2020-07-20 21:11:40,926 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 [2020-07-20 21:11:41,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:41,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:11:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41248 backedges. 2262 proven. 2775 refuted. 0 times theorem prover too weak. 36211 trivial. 0 not checked. [2020-07-20 21:11:41,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:46,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:46,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:47,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:47,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:47,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:47,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:48,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:48,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:48,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:48,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:48,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41248 backedges. 2274 proven. 2842 refuted. 0 times theorem prover too weak. 36132 trivial. 0 not checked. [2020-07-20 21:11:49,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824352415] [2020-07-20 21:11:49,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:49,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 21:11:49,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416449973] [2020-07-20 21:11:49,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:11:49,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:11:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:11:49,962 INFO L87 Difference]: Start difference. First operand 142 states and 224 transitions. Second operand 20 states. [2020-07-20 21:11:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:50,430 INFO L93 Difference]: Finished difference Result 238 states and 383 transitions. [2020-07-20 21:11:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:11:50,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 834 [2020-07-20 21:11:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:50,437 INFO L225 Difference]: With dead ends: 238 [2020-07-20 21:11:50,437 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 21:11:50,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1675 GetRequests, 1632 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:11:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 21:11:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 175. [2020-07-20 21:11:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-20 21:11:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 287 transitions. [2020-07-20 21:11:50,480 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 287 transitions. Word has length 834 [2020-07-20 21:11:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:50,481 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 287 transitions. [2020-07-20 21:11:50,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:11:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 287 transitions. [2020-07-20 21:11:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-07-20 21:11:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:50,501 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 88, 59, 59, 59, 59, 59, 59, 59, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:50,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:50,715 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash 494408593, now seen corresponding path program 16 times [2020-07-20 21:11:50,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:50,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639046148] [2020-07-20 21:11:50,717 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 [2020-07-20 21:11:51,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:51,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:11:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1066 proven. 4024 refuted. 0 times theorem prover too weak. 33666 trivial. 0 not checked. [2020-07-20 21:11:51,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:56,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:58,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:59,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:59,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:59,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:11:59,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1067 proven. 4093 refuted. 0 times theorem prover too weak. 33596 trivial. 0 not checked. [2020-07-20 21:12:00,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639046148] [2020-07-20 21:12:00,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:00,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:12:00,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971074379] [2020-07-20 21:12:00,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:12:00,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:12:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:12:00,810 INFO L87 Difference]: Start difference. First operand 175 states and 287 transitions. Second operand 22 states. [2020-07-20 21:12:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:01,320 INFO L93 Difference]: Finished difference Result 214 states and 340 transitions. [2020-07-20 21:12:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:12:01,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 809 [2020-07-20 21:12:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:01,327 INFO L225 Difference]: With dead ends: 214 [2020-07-20 21:12:01,328 INFO L226 Difference]: Without dead ends: 184 [2020-07-20 21:12:01,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1625 GetRequests, 1580 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:12:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-07-20 21:12:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2020-07-20 21:12:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 21:12:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 276 transitions. [2020-07-20 21:12:01,365 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 276 transitions. Word has length 809 [2020-07-20 21:12:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:01,366 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 276 transitions. [2020-07-20 21:12:01,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:12:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 276 transitions. [2020-07-20 21:12:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-20 21:12:01,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:01,383 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 88, 58, 58, 58, 58, 58, 58, 58, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:01,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:01,598 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash 992942244, now seen corresponding path program 17 times [2020-07-20 21:12:01,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:01,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085234850] [2020-07-20 21:12:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 21:12:02,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:12:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1194 proven. 3816 refuted. 0 times theorem prover too weak. 32574 trivial. 0 not checked. [2020-07-20 21:12:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:08,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:08,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:10,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:11,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:11,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:11,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:11,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:12,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:12,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:12,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:12,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:12,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1193 proven. 3887 refuted. 0 times theorem prover too weak. 32504 trivial. 0 not checked. [2020-07-20 21:12:13,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085234850] [2020-07-20 21:12:13,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:13,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:12:13,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457370484] [2020-07-20 21:12:13,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:12:13,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:12:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:12:13,329 INFO L87 Difference]: Start difference. First operand 172 states and 276 transitions. Second operand 22 states. [2020-07-20 21:12:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:14,114 INFO L93 Difference]: Finished difference Result 230 states and 358 transitions. [2020-07-20 21:12:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:12:14,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 797 [2020-07-20 21:12:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:14,121 INFO L225 Difference]: With dead ends: 230 [2020-07-20 21:12:14,121 INFO L226 Difference]: Without dead ends: 205 [2020-07-20 21:12:14,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1556 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:12:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-20 21:12:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-07-20 21:12:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 21:12:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 252 transitions. [2020-07-20 21:12:14,162 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 252 transitions. Word has length 797 [2020-07-20 21:12:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:14,162 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 252 transitions. [2020-07-20 21:12:14,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:12:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 252 transitions. [2020-07-20 21:12:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 21:12:14,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:14,178 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:14,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:14,394 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2111322276, now seen corresponding path program 18 times [2020-07-20 21:12:14,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:14,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393354118] [2020-07-20 21:12:14,395 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 [2020-07-20 21:12:15,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:12:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 21:12:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3393 proven. 556 refuted. 0 times theorem prover too weak. 29235 trivial. 0 not checked. [2020-07-20 21:12:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:18,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:18,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:19,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:20,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:20,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:20,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:20,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:20,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:21,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3399 proven. 613 refuted. 0 times theorem prover too weak. 29172 trivial. 0 not checked. [2020-07-20 21:12:23,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393354118] [2020-07-20 21:12:23,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:23,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-20 21:12:23,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351745187] [2020-07-20 21:12:23,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 21:12:23,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 21:12:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-20 21:12:23,274 INFO L87 Difference]: Start difference. First operand 159 states and 252 transitions. Second operand 18 states. [2020-07-20 21:12:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:23,747 INFO L93 Difference]: Finished difference Result 182 states and 282 transitions. [2020-07-20 21:12:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:12:23,747 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 750 [2020-07-20 21:12:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:23,753 INFO L225 Difference]: With dead ends: 182 [2020-07-20 21:12:23,753 INFO L226 Difference]: Without dead ends: 175 [2020-07-20 21:12:23,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1468 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-20 21:12:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-20 21:12:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2020-07-20 21:12:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-20 21:12:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 255 transitions. [2020-07-20 21:12:23,787 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 255 transitions. Word has length 750 [2020-07-20 21:12:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:23,788 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 255 transitions. [2020-07-20 21:12:23,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 21:12:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 255 transitions. [2020-07-20 21:12:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-07-20 21:12:23,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:23,804 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 89, 56, 56, 56, 56, 56, 56, 56, 33, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:24,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:24,020 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1476570892, now seen corresponding path program 19 times [2020-07-20 21:12:24,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:24,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635473055] [2020-07-20 21:12:24,021 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 [2020-07-20 21:12:24,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:24,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 21:12:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 3265 proven. 1392 refuted. 0 times theorem prover too weak. 30731 trivial. 0 not checked. [2020-07-20 21:12:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:28,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:28,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:30,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:30,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:30,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:31,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:31,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:31,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:31,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:32,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:32,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:32,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 3275 proven. 1461 refuted. 0 times theorem prover too weak. 30652 trivial. 0 not checked. [2020-07-20 21:12:34,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635473055] [2020-07-20 21:12:34,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:34,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 21:12:34,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101139188] [2020-07-20 21:12:34,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:12:34,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:12:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:12:34,899 INFO L87 Difference]: Start difference. First operand 162 states and 255 transitions. Second operand 20 states. [2020-07-20 21:12:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:35,566 INFO L93 Difference]: Finished difference Result 221 states and 344 transitions. [2020-07-20 21:12:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:12:35,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 774 [2020-07-20 21:12:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:35,577 INFO L225 Difference]: With dead ends: 221 [2020-07-20 21:12:35,577 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 21:12:35,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1555 GetRequests, 1512 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 21:12:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 21:12:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2020-07-20 21:12:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 21:12:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 260 transitions. [2020-07-20 21:12:35,635 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 260 transitions. Word has length 774 [2020-07-20 21:12:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:35,636 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 260 transitions. [2020-07-20 21:12:35,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:12:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 260 transitions. [2020-07-20 21:12:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 21:12:35,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:35,662 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:35,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:35,865 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2114547388, now seen corresponding path program 20 times [2020-07-20 21:12:35,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:35,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024248158] [2020-07-20 21:12:35,868 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:36,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:36,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:12:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1926 proven. 2354 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-20 21:12:37,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:42,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:42,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:43,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:43,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:44,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:44,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:44,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:44,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:44,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:45,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:45,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:45,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 2403 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-20 21:12:46,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024248158] [2020-07-20 21:12:46,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:12:46,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:12:46,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589554108] [2020-07-20 21:12:46,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:12:46,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:12:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:12:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:12:46,769 INFO L87 Difference]: Start difference. First operand 164 states and 260 transitions. Second operand 20 states. [2020-07-20 21:12:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:12:47,130 INFO L93 Difference]: Finished difference Result 321 states and 520 transitions. [2020-07-20 21:12:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:12:47,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-20 21:12:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:12:47,139 INFO L225 Difference]: With dead ends: 321 [2020-07-20 21:12:47,139 INFO L226 Difference]: Without dead ends: 296 [2020-07-20 21:12:47,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:12:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-20 21:12:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-07-20 21:12:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-20 21:12:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 322 transitions. [2020-07-20 21:12:47,177 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 322 transitions. Word has length 773 [2020-07-20 21:12:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:12:47,177 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 322 transitions. [2020-07-20 21:12:47,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:12:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 322 transitions. [2020-07-20 21:12:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 21:12:47,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:12:47,193 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:12:47,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:47,403 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:12:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:12:47,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1764616954, now seen corresponding path program 21 times [2020-07-20 21:12:47,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:12:47,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051629132] [2020-07-20 21:12:47,405 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:12:48,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:12:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:12:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:12:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:12:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1516 proven. 3334 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 21:12:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:12:54,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:57,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:57,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:57,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:58,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:58,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:58,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:59,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:59,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:59,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:12:59,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1513 proven. 3407 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 21:13:00,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051629132] [2020-07-20 21:13:00,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:00,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:13:00,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110523420] [2020-07-20 21:13:00,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:13:00,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:13:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:13:00,470 INFO L87 Difference]: Start difference. First operand 200 states and 322 transitions. Second operand 22 states. [2020-07-20 21:13:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:01,181 INFO L93 Difference]: Finished difference Result 332 states and 518 transitions. [2020-07-20 21:13:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:01,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 21:13:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:01,192 INFO L225 Difference]: With dead ends: 332 [2020-07-20 21:13:01,192 INFO L226 Difference]: Without dead ends: 302 [2020-07-20 21:13:01,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:13:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-20 21:13:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 187. [2020-07-20 21:13:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 21:13:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-07-20 21:13:01,233 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 773 [2020-07-20 21:13:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:01,233 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-07-20 21:13:01,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:13:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-07-20 21:13:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 21:13:01,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:01,253 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:01,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:01,468 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 22 times [2020-07-20 21:13:01,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:01,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131265410] [2020-07-20 21:13:01,470 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:02,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:02,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:13:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-20 21:13:02,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:06,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:06,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:07,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:07,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:08,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:09,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-20 21:13:12,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131265410] [2020-07-20 21:13:12,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:12,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 21:13:12,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752463835] [2020-07-20 21:13:12,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 21:13:12,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 21:13:12,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:13:12,081 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 20 states. [2020-07-20 21:13:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:12,806 INFO L93 Difference]: Finished difference Result 297 states and 457 transitions. [2020-07-20 21:13:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 21:13:12,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-20 21:13:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:12,818 INFO L225 Difference]: With dead ends: 297 [2020-07-20 21:13:12,819 INFO L226 Difference]: Without dead ends: 290 [2020-07-20 21:13:12,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 21:13:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-20 21:13:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 174. [2020-07-20 21:13:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-20 21:13:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 267 transitions. [2020-07-20 21:13:12,865 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 267 transitions. Word has length 761 [2020-07-20 21:13:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:12,866 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 267 transitions. [2020-07-20 21:13:12,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 21:13:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 267 transitions. [2020-07-20 21:13:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 21:13:12,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:12,883 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:13,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,097 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 23 times [2020-07-20 21:13:13,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:13,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677193536] [2020-07-20 21:13:13,100 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:13,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:13,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:13:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 21:13:14,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:19,239 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 21:13:19,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:21,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:21,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:22,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:22,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:22,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:23,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:23,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:23,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:24,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:27,145 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:13:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 21:13:27,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677193536] [2020-07-20 21:13:27,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:27,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:13:27,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204854781] [2020-07-20 21:13:27,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:13:27,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:13:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:13:27,460 INFO L87 Difference]: Start difference. First operand 174 states and 267 transitions. Second operand 22 states. [2020-07-20 21:13:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:28,486 INFO L93 Difference]: Finished difference Result 443 states and 692 transitions. [2020-07-20 21:13:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:28,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 21:13:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:28,504 INFO L225 Difference]: With dead ends: 443 [2020-07-20 21:13:28,504 INFO L226 Difference]: Without dead ends: 421 [2020-07-20 21:13:28,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:13:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-07-20 21:13:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 174. [2020-07-20 21:13:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-20 21:13:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 269 transitions. [2020-07-20 21:13:28,565 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 269 transitions. Word has length 761 [2020-07-20 21:13:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:28,566 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 269 transitions. [2020-07-20 21:13:28,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:13:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 269 transitions. [2020-07-20 21:13:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 21:13:28,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:28,585 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:28,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:28,787 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1953028691, now seen corresponding path program 24 times [2020-07-20 21:13:28,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:28,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056177968] [2020-07-20 21:13:28,789 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:29,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:13:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2164 proven. 2606 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 21:13:30,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:32,843 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-20 21:13:36,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:37,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,532 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 21:13:39,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:39,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:40,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:40,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:40,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:41,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2159 proven. 2681 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 21:13:42,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056177968] [2020-07-20 21:13:42,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:42,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:13:42,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116362014] [2020-07-20 21:13:42,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:13:42,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:13:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:13:42,739 INFO L87 Difference]: Start difference. First operand 174 states and 269 transitions. Second operand 22 states. [2020-07-20 21:13:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:43,449 INFO L93 Difference]: Finished difference Result 270 states and 415 transitions. [2020-07-20 21:13:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:43,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 21:13:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:43,456 INFO L225 Difference]: With dead ends: 270 [2020-07-20 21:13:43,456 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 21:13:43,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:13:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 21:13:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 101. [2020-07-20 21:13:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 21:13:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-20 21:13:43,483 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-20 21:13:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:43,484 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-20 21:13:43,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:13:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-20 21:13:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 21:13:43,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:43,493 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:43,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:43,707 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 25 times [2020-07-20 21:13:43,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:43,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154101979] [2020-07-20 21:13:43,709 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:44,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:44,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:44,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 21:13:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:13:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4243 refuted. 0 times theorem prover too weak. 28136 trivial. 0 not checked. [2020-07-20 21:13:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:13:51,514 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 21:13:51,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:51,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:53,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:55,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:56,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:56,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:56,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:13:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-20 21:13:57,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154101979] [2020-07-20 21:13:57,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:13:57,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 21:13:57,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617440153] [2020-07-20 21:13:57,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:13:57,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:13:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:13:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:13:57,753 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-20 21:13:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:13:58,595 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-20 21:13:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:13:58,598 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-20 21:13:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:13:58,602 INFO L225 Difference]: With dead ends: 271 [2020-07-20 21:13:58,602 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 21:13:58,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 21:13:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 21:13:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-20 21:13:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 21:13:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-20 21:13:58,622 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-20 21:13:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:13:58,622 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-20 21:13:58,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:13:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-20 21:13:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 21:13:58,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:13:58,628 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:13:58,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:58,829 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:13:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:13:58,831 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 26 times [2020-07-20 21:13:58,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:13:58,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877752354] [2020-07-20 21:13:58,832 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:13:59,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:13:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:13:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:13:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:14:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 21:14:00,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:14:03,262 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 21:14:06,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:09,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:09,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:10,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:10,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:11,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:11,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:11,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:11,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:12,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:12,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:12,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 21:14:12,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877752354] [2020-07-20 21:14:12,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:14:12,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 21:14:12,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423134690] [2020-07-20 21:14:12,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 21:14:12,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:14:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 21:14:12,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 21:14:12,846 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-20 21:14:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:14:13,452 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-20 21:14:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 21:14:13,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 21:14:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:14:13,457 INFO L225 Difference]: With dead ends: 135 [2020-07-20 21:14:13,457 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 21:14:13,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 21:14:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 21:14:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-20 21:14:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 21:14:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-20 21:14:13,468 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-20 21:14:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:14:13,469 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-20 21:14:13,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 21:14:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-20 21:14:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 21:14:13,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:14:13,474 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:14:13,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:13,675 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:14:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:14:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 27 times [2020-07-20 21:14:13,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:14:13,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841684033] [2020-07-20 21:14:13,677 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:14,581 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:14:14,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:14:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:14:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:14:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-20 21:14:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:14:15,572 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 21:14:22,927 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 21:14:23,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:26,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:26,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:27,903 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 21:14:27,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:27,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:29,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:29,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:30,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:30,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:30,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:30,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:14:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-20 21:14:31,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841684033] [2020-07-20 21:14:31,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:14:31,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 21:14:31,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067662659] [2020-07-20 21:14:31,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 21:14:31,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:14:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 21:14:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 21:14:31,334 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-20 21:14:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:14:32,312 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-20 21:14:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 21:14:32,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-20 21:14:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:14:32,316 INFO L225 Difference]: With dead ends: 219 [2020-07-20 21:14:32,317 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:14:32,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 21:14:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:14:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:14:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:14:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:14:32,331 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-20 21:14:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:14:32,331 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:14:32,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 21:14:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:14:32,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:14:32,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:14:32,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:14:36,531 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 436 DAG size of output: 134 [2020-07-20 21:14:36,754 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:14:42,615 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 644 DAG size of output: 228 [2020-07-20 21:14:49,628 WARN L193 SmtUtils]: Spent 7.01 s on a formula simplification. DAG size of input: 651 DAG size of output: 257 [2020-07-20 21:14:49,790 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:14:50,420 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 101 [2020-07-20 21:14:55,407 WARN L193 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 608 DAG size of output: 226 [2020-07-20 21:14:57,242 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 572 DAG size of output: 208 [2020-07-20 21:14:57,406 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:14:57,984 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:15:03,230 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:15:07,852 WARN L193 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 614 DAG size of output: 226 [2020-07-20 21:15:13,152 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:15:13,316 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:15:13,933 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:15:14,102 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:15:14,663 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 101 [2020-07-20 21:15:15,985 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 435 DAG size of output: 134 [2020-07-20 21:15:21,284 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:15:26,036 WARN L193 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 624 DAG size of output: 226 [2020-07-20 21:15:30,581 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 608 DAG size of output: 226 [2020-07-20 21:15:35,249 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 614 DAG size of output: 226 [2020-07-20 21:15:35,425 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:15:41,551 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:15:42,366 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 109 [2020-07-20 21:15:42,546 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:15:43,125 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 102 [2020-07-20 21:15:44,478 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 435 DAG size of output: 134 [2020-07-20 21:15:49,764 WARN L193 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:15:54,455 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:15:59,420 WARN L193 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 624 DAG size of output: 226 [2020-07-20 21:16:05,005 WARN L193 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:16:05,179 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:16:05,346 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:16:06,157 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 109 [2020-07-20 21:16:11,528 WARN L193 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:16:12,110 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 101 [2020-07-20 21:16:12,739 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 101 [2020-07-20 21:16:17,434 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 614 DAG size of output: 226 [2020-07-20 21:16:18,095 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 102 [2020-07-20 21:16:18,306 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 21:16:23,905 WARN L193 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:16:24,078 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:16:28,384 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 617 DAG size of output: 226 [2020-07-20 21:16:28,991 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 102 [2020-07-20 21:16:29,817 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 109 [2020-07-20 21:16:34,471 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:16:34,641 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:16:35,399 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 107 [2020-07-20 21:16:40,755 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:16:46,112 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:16:50,725 WARN L193 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:16:51,285 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 102 [2020-07-20 21:16:55,825 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 615 DAG size of output: 227 [2020-07-20 21:16:56,023 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 21:17:01,114 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:17:05,932 WARN L193 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 623 DAG size of output: 226 [2020-07-20 21:17:06,103 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:17:11,318 WARN L193 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:17:15,787 WARN L193 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:17:20,979 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:17:21,191 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-20 21:17:21,358 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:17:21,942 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:17:22,107 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:17:26,827 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 615 DAG size of output: 227 [2020-07-20 21:17:27,455 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:17:33,124 WARN L193 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:17:37,979 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:17:42,666 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 614 DAG size of output: 227 [2020-07-20 21:17:47,601 WARN L193 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 624 DAG size of output: 226 [2020-07-20 21:17:47,777 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:17:48,542 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 106 [2020-07-20 21:17:49,158 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:17:54,555 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:17:54,715 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:18:00,162 WARN L193 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:18:00,330 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:18:04,945 WARN L193 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:18:05,525 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:18:10,434 WARN L193 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 624 DAG size of output: 227 [2020-07-20 21:18:15,684 WARN L193 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:18:16,448 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 106 [2020-07-20 21:18:16,619 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:18:21,925 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:18:22,491 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:18:27,787 WARN L193 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:18:32,413 WARN L193 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:18:32,582 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:18:33,159 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:18:38,137 WARN L193 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 623 DAG size of output: 227 [2020-07-20 21:18:38,726 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:18:43,929 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 644 DAG size of output: 227 [2020-07-20 21:18:49,139 WARN L193 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:18:53,838 WARN L193 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:18:54,400 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 101 [2020-07-20 21:18:54,570 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:18:55,304 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 106 [2020-07-20 21:19:00,516 WARN L193 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 644 DAG size of output: 227 [2020-07-20 21:19:05,173 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:19:05,854 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 104 [2020-07-20 21:19:11,098 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:19:15,768 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:19:20,970 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:19:25,539 WARN L193 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:19:26,132 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:19:26,796 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 104 [2020-07-20 21:19:26,980 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 64 [2020-07-20 21:19:27,384 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 83 [2020-07-20 21:19:32,821 WARN L193 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:19:38,079 WARN L193 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 644 DAG size of output: 227 [2020-07-20 21:19:42,634 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 608 DAG size of output: 226 [2020-07-20 21:19:43,240 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:19:43,415 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:19:45,324 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 465 DAG size of output: 152 [2020-07-20 21:19:50,103 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:19:50,489 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 83 [2020-07-20 21:19:55,977 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:19:57,935 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 465 DAG size of output: 152 [2020-07-20 21:20:02,090 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 575 DAG size of output: 213 [2020-07-20 21:20:06,341 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 575 DAG size of output: 213 [2020-07-20 21:20:06,524 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:20:06,722 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 21:20:07,333 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:20:12,098 WARN L193 SmtUtils]: Spent 4.76 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:20:17,468 WARN L193 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 638 DAG size of output: 227 [2020-07-20 21:20:22,775 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 644 DAG size of output: 227 [2020-07-20 21:20:22,945 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:20:23,140 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 21:20:23,735 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:20:28,477 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification. DAG size of input: 608 DAG size of output: 226 [2020-07-20 21:20:28,876 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 83 [2020-07-20 21:20:29,476 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:20:34,896 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:20:36,850 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 464 DAG size of output: 152 [2020-07-20 21:20:37,019 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:20:41,739 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:20:46,419 WARN L193 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:20:46,608 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 63 [2020-07-20 21:20:52,063 WARN L193 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 644 DAG size of output: 227 [2020-07-20 21:20:52,238 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:20:52,809 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 101 [2020-07-20 21:20:57,015 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 576 DAG size of output: 210 [2020-07-20 21:21:02,538 WARN L193 SmtUtils]: Spent 5.52 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:21:05,892 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 545 DAG size of output: 185 [2020-07-20 21:21:06,067 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:21:08,068 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 464 DAG size of output: 152 [2020-07-20 21:21:12,188 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 576 DAG size of output: 207 [2020-07-20 21:21:17,008 WARN L193 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 608 DAG size of output: 226 [2020-07-20 21:21:17,612 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:21:20,954 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 545 DAG size of output: 185 [2020-07-20 21:21:26,437 WARN L193 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 645 DAG size of output: 227 [2020-07-20 21:21:27,037 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 101 [2020-07-20 21:21:31,910 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:21:35,135 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 545 DAG size of output: 185 [2020-07-20 21:21:35,304 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:21:40,806 WARN L193 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 645 DAG size of output: 228 [2020-07-20 21:21:44,953 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 575 DAG size of output: 207 [2020-07-20 21:21:45,143 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:21:50,605 WARN L193 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 615 DAG size of output: 226 [2020-07-20 21:21:56,764 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 645 DAG size of output: 228 [2020-07-20 21:22:02,099 WARN L193 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 614 DAG size of output: 226 [2020-07-20 21:22:02,742 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 101 [2020-07-20 21:22:02,931 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 21:22:18,998 WARN L193 SmtUtils]: Spent 15.91 s on a formula simplification. DAG size of input: 489 DAG size of output: 49 [2020-07-20 21:22:19,005 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 21:22:19,006 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 21:22:19,006 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-20 21:22:19,007 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 21:22:19,007 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (<= 7 |fibonacci_#in~n|))) (let ((.cse0 (<= |fibonacci_#in~n| 6)) (.cse1 (and (<= |fibonacci_#in~n| 7) (= 8 |fibonacci_#t~ret0|) .cse2))) (and (or .cse0 .cse1 (<= 8 |fibonacci_#in~n|)) (or (and (= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 3)) (and (= 2 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 4) (<= 4 |fibonacci_#in~n|)) (<= 9 |fibonacci_#in~n|) (and .cse0 (<= 6 |fibonacci_#in~n|) (= 5 |fibonacci_#t~ret0|)) .cse1 (and (= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5) (<= 5 |fibonacci_#in~n|)) (and (= 13 |fibonacci_#t~ret0|) .cse2)) (<= |fibonacci_#in~n| fibonacci_~n) (or (<= |fibonacci_#in~n| 8) (= 21 |fibonacci_#t~ret0|) (<= 10 |fibonacci_#in~n|)) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)))) [2020-07-20 21:22:19,007 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 21:22:19,007 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-20 21:22:19,008 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-20 21:22:19,008 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-20 21:22:19,008 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:22:19,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:22:19,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:22:19,008 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:22:19,008 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 21:22:19,009 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 21:22:19,009 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 9) (<= 9 main_~x~0)) [2020-07-20 21:22:19,009 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-20 21:22:19,010 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2020-07-20 21:22:19,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:22:19 BoogieIcfgContainer [2020-07-20 21:22:19,017 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:22:19,018 INFO L168 Benchmark]: Toolchain (without parser) took 766759.32 ms. Allocated memory was 144.7 MB in the beginning and 2.8 GB in the end (delta: 2.7 GB). Free memory was 101.3 MB in the beginning and 1.1 GB in the end (delta: -990.9 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,019 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.01 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,020 INFO L168 Benchmark]: Boogie Preprocessor took 28.15 ms. Allocated memory is still 144.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,020 INFO L168 Benchmark]: RCFGBuilder took 354.25 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 169.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,020 INFO L168 Benchmark]: TraceAbstraction took 766121.40 ms. Allocated memory was 201.9 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 169.0 MB in the beginning and 1.1 GB in the end (delta: -923.3 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2020-07-20 21:22:19,022 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.01 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.15 ms. Allocated memory is still 144.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.25 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.2 MB in the beginning and 169.6 MB in the end (delta: -79.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 766121.40 ms. Allocated memory was 201.9 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 169.0 MB in the beginning and 1.1 GB in the end (delta: -923.3 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 299.5s, OverallIterations: 37, TraceHistogramMax: 245, AutomataDifference: 17.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 466.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1102 SDtfs, 1387 SDslu, 5640 SDs, 0 SdLazy, 7386 SolverSat, 2420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43490 GetRequests, 42164 SyntacticMatches, 484 SemanticMatches, 842 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 37 MinimizatonAttempts, 1278 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 497 PreInvPairs, 38127 NumberOfFragments, 117 HoareAnnotationTreeSize, 497 FomulaSimplifications, 14423389622289 FormulaSimplificationTreeSizeReduction, 450.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 119178749 FormulaSimplificationTreeSizeReductionInter, 16.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 255.6s InterpolantComputationTime, 21653 NumberOfCodeBlocks, 16658 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 43207 ConstructedInterpolants, 0 QuantifiedInterpolants, 44768273 SizeOfPredicates, 269 NumberOfNonLiveVariables, 41150 ConjunctsInSsa, 989 ConjunctsInUnsatCore, 72 InterpolantComputations, 2 PerfectInterpolantSequences, 1945380/2146380 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...