/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:25:20,266 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 23:25:20,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:25:20,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:25:20,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:25:20,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:25:20,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:25:20,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:25:20,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:25:20,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:25:20,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:25:20,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:25:20,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:25:20,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:25:20,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:25:20,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:25:20,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:25:20,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:25:20,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:25:20,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:25:20,355 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:25:20,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:25:20,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:25:20,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:25:20,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:25:20,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:25:20,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:25:20,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:25:20,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:25:20,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:25:20,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:25:20,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:25:20,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:25:20,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:25:20,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:25:20,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:25:20,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:25:20,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:25:20,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:25:20,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:25:20,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:25:20,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:25:20,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:20,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:25:20,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:25:20,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:25:20,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:25:20,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:25:20,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:25:20,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:25:20,669 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:25:20,670 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 23:25:20,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e4189a6/b859dc3c9ab6470a8cf8c55cc57c6a47/FLAG629293cb7 [2020-07-21 23:25:21,237 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:25:21,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 23:25:21,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e4189a6/b859dc3c9ab6470a8cf8c55cc57c6a47/FLAG629293cb7 [2020-07-21 23:25:21,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e4189a6/b859dc3c9ab6470a8cf8c55cc57c6a47 [2020-07-21 23:25:21,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:25:21,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:25:21,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:25:21,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:25:21,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:25:21,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6b0e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21, skipping insertion in model container [2020-07-21 23:25:21,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:25:21,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:25:21,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:25:21,845 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:25:21,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:25:21,879 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:25:21,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21 WrapperNode [2020-07-21 23:25:21,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:25:21,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:25:21,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:25:21,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:25:21,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... [2020-07-21 23:25:21,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:25:21,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:25:21,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:25:21,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:25:21,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:25:22,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:25:22,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:25:22,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:25:22,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:25:22,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:25:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:25:22,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:25:22,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:25:22,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:25:22,274 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:25:22,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:25:22 BoogieIcfgContainer [2020-07-21 23:25:22,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:25:22,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:25:22,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:25:22,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:25:22,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:25:21" (1/3) ... [2020-07-21 23:25:22,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72539fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:25:22, skipping insertion in model container [2020-07-21 23:25:22,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:25:21" (2/3) ... [2020-07-21 23:25:22,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72539fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:25:22, skipping insertion in model container [2020-07-21 23:25:22,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:25:22" (3/3) ... [2020-07-21 23:25:22,287 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-07-21 23:25:22,299 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:25:22,307 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:25:22,322 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:25:22,348 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:25:22,348 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:25:22,348 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:25:22,348 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:25:22,349 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:25:22,349 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:25:22,349 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:25:22,349 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:25:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 23:25:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:25:22,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:22,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:22,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-07-21 23:25:22,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:22,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568541526] [2020-07-21 23:25:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:22,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:25:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:22,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:25:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:22,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:25:22,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568541526] [2020-07-21 23:25:22,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:25:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:25:22,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885315443] [2020-07-21 23:25:22,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:25:22,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:25:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:25:22,692 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-07-21 23:25:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:22,870 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-21 23:25:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:25:22,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-21 23:25:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:22,884 INFO L225 Difference]: With dead ends: 46 [2020-07-21 23:25:22,884 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 23:25:22,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:25:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 23:25:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 23:25:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 23:25:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 23:25:22,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 23:25:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:22,947 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 23:25:22,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:25:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 23:25:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:25:22,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:22,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:23,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:23,166 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-07-21 23:25:23,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:23,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658270016] [2020-07-21 23:25:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:23,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:25:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:25:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:23,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:23,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658270016] [2020-07-21 23:25:23,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:23,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 23:25:23,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228995678] [2020-07-21 23:25:23,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 23:25:23,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 23:25:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:25:23,401 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-07-21 23:25:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:23,639 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 23:25:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 23:25:23,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-07-21 23:25:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:23,641 INFO L225 Difference]: With dead ends: 25 [2020-07-21 23:25:23,641 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:25:23,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:25:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:25:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:25:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:25:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 23:25:23,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 23:25:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:23,650 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 23:25:23,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 23:25:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 23:25:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:25:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:23,652 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:23,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:23,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1744767088, now seen corresponding path program 2 times [2020-07-21 23:25:23,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:23,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605358228] [2020-07-21 23:25:23,868 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:23,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 23:25:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:24,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:24,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:24,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605358228] [2020-07-21 23:25:24,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:24,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 23:25:24,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14399484] [2020-07-21 23:25:24,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 23:25:24,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 23:25:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:25:24,287 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2020-07-21 23:25:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:24,879 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 23:25:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 23:25:24,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-07-21 23:25:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:24,888 INFO L225 Difference]: With dead ends: 31 [2020-07-21 23:25:24,888 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 23:25:24,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-07-21 23:25:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 23:25:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 23:25:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 23:25:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 23:25:24,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 23:25:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:24,899 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 23:25:24,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 23:25:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 23:25:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:25:24,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:24,901 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:25,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:25,116 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1040440016, now seen corresponding path program 3 times [2020-07-21 23:25:25,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:25,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328692777] [2020-07-21 23:25:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:25,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:25,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:25,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 23:25:25,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:25,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:25,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:25,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328692777] [2020-07-21 23:25:25,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:25,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 23:25:25,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332835622] [2020-07-21 23:25:25,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 23:25:25,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 23:25:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-07-21 23:25:25,918 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 29 states. [2020-07-21 23:25:26,462 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 23:25:26,704 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-07-21 23:25:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:27,581 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-07-21 23:25:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 23:25:27,583 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 22 [2020-07-21 23:25:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:27,585 INFO L225 Difference]: With dead ends: 43 [2020-07-21 23:25:27,585 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:25:27,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 23:25:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:25:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 23:25:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 23:25:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 23:25:27,596 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 23:25:27,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:27,597 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 23:25:27,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 23:25:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 23:25:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 23:25:27,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:27,598 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:27,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:27,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -276146064, now seen corresponding path program 4 times [2020-07-21 23:25:27,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:27,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883835318] [2020-07-21 23:25:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:27,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:27,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:27,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 23:25:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:28,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:28,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:30,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883835318] [2020-07-21 23:25:30,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:30,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 23:25:30,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939180391] [2020-07-21 23:25:30,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 23:25:30,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:30,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 23:25:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=2119, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 23:25:30,045 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 53 states. [2020-07-21 23:25:31,020 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 23:25:31,418 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 23:25:31,748 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:25:32,085 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-07-21 23:25:32,398 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:25:32,761 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 23:25:33,052 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 23:25:33,351 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 23:25:33,667 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 23:25:33,952 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 23:25:34,222 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 23:25:37,012 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:25:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:37,029 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-21 23:25:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 23:25:37,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 34 [2020-07-21 23:25:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:37,032 INFO L225 Difference]: With dead ends: 67 [2020-07-21 23:25:37,032 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 23:25:37,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1952, Invalid=4528, Unknown=0, NotChecked=0, Total=6480 [2020-07-21 23:25:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 23:25:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 23:25:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 23:25:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 23:25:37,064 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 23:25:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:37,065 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 23:25:37,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 23:25:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 23:25:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 23:25:37,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:37,067 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:37,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:37,283 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2111955216, now seen corresponding path program 5 times [2020-07-21 23:25:37,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:37,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588318803] [2020-07-21 23:25:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:37,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:37,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:37,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 23:25:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:39,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:39,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:25:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:25:45,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588318803] [2020-07-21 23:25:45,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:45,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 23:25:45,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169028569] [2020-07-21 23:25:45,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 23:25:45,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 23:25:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2413, Invalid=7687, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 23:25:45,638 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 101 states. [2020-07-21 23:25:49,195 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 23:25:50,233 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 23:25:51,520 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 23:25:52,476 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 193 [2020-07-21 23:25:53,731 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 23:25:55,174 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 23:25:56,400 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 23:25:57,658 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 23:25:58,826 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 23:26:00,046 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 23:26:01,178 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 23:26:02,350 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 23:26:03,460 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 23:26:04,550 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 23:26:05,625 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 23:26:06,633 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 23:26:07,710 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 23:26:08,710 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 23:26:09,692 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 23:26:10,659 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 23:26:11,585 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 23:26:12,524 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 23:26:13,469 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 23:26:14,319 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 23:26:15,220 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 23:26:16,076 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 23:26:16,857 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 23:26:17,682 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 23:26:18,457 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 23:26:19,197 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 23:26:19,912 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 23:26:20,673 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 23:26:21,347 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 23:26:21,961 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 23:26:22,606 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 23:26:23,260 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 23:26:23,835 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 23:26:24,378 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 23:26:24,901 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 23:26:25,443 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 23:26:30,461 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 23:26:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:26:30,490 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-07-21 23:26:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 23:26:30,492 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 58 [2020-07-21 23:26:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:26:30,494 INFO L225 Difference]: With dead ends: 115 [2020-07-21 23:26:30,494 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 23:26:30,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=7328, Invalid=15928, Unknown=0, NotChecked=0, Total=23256 [2020-07-21 23:26:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 23:26:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 23:26:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 23:26:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 23:26:30,531 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 23:26:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:26:30,532 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 23:26:30,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 23:26:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 23:26:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 23:26:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:26:30,534 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:26:30,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:26:30,736 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:26:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:26:30,737 INFO L82 PathProgramCache]: Analyzing trace with hash -236770320, now seen corresponding path program 6 times [2020-07-21 23:26:30,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:26:30,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369826286] [2020-07-21 23:26:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:26:30,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:26:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:26:30,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 23:26:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:26:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:26:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:26:43,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:27:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:27:21,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369826286] [2020-07-21 23:27:21,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:27:21,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 23:27:21,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636557228] [2020-07-21 23:27:21,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 23:27:21,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:27:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 23:27:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9421, Invalid=29191, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 23:27:21,256 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 197 states. [2020-07-21 23:27:49,514 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 23:27:54,058 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 23:28:06,558 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 23:28:10,646 WARN L193 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 479 DAG size of output: 385 [2020-07-21 23:28:24,436 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 23:28:40,709 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 23:28:57,166 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 23:29:13,985 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 23:29:31,655 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 23:29:49,601 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 23:30:08,632 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 23:30:28,174 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 23:30:48,292 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 23:31:08,568 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 23:31:29,377 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 23:31:50,596 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 23:32:11,873 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 23:32:32,968 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 23:32:54,210 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 23:33:15,467 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 23:33:36,903 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 23:33:58,511 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 23:34:17,001 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 23:34:35,406 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 23:34:58,899 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 23:35:22,544 WARN L193 SmtUtils]: Spent 3.43 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 23:35:42,034 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 23:36:01,546 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 23:36:25,706 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 23:36:49,602 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 23:37:10,362 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 23:37:32,202 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 23:37:55,723 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 23:38:18,101 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 23:38:35,913 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 23:38:49,846 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-21 23:39:02,410 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-21 23:39:15,106 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 23:39:27,619 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 23:39:40,194 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 297