/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:08:36,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:08:36,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:08:36,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:08:36,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:08:36,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:08:36,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:08:36,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:08:36,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:08:36,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:08:36,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:08:36,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:08:36,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:08:36,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:08:36,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:08:36,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:08:36,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:08:36,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:08:36,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:08:36,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:08:36,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:08:36,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:08:36,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:08:36,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:08:36,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:08:36,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:08:36,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:08:36,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:08:36,381 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 11:08:36,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:08:36,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:08:36,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:08:36,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:08:36,408 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:08:36,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:08:36,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:08:36,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:08:36,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:08:36,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:08:36,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:08:36,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:08:36,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:08:36,410 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:08:36,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:08:36,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:08:36,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:08:36,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:08:36,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:08:36,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:08:36,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:08:36,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:08:36,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:08:36,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:08:36,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:08:36,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:08:36,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:36,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:08:36,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:08:36,417 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 -> NOT_INCREMENTALLY [2020-07-21 11:08:36,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:08:36,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:08:36,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:08:36,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:08:36,956 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:08:36,959 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-21 11:08:37,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216f43b8f/53043e8b9eda4fa9a1a995951d2f375b/FLAG55fbd707c [2020-07-21 11:08:38,028 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:08:38,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-07-21 11:08:38,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216f43b8f/53043e8b9eda4fa9a1a995951d2f375b/FLAG55fbd707c [2020-07-21 11:08:38,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216f43b8f/53043e8b9eda4fa9a1a995951d2f375b [2020-07-21 11:08:38,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:08:38,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:08:38,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:08:38,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:08:38,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:08:38,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3086cc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38, skipping insertion in model container [2020-07-21 11:08:38,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:08:38,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:08:38,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:08:38,411 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:08:38,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:08:38,449 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:08:38,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38 WrapperNode [2020-07-21 11:08:38,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:08:38,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:08:38,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:08:38,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:08:38,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (1/1) ... [2020-07-21 11:08:38,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:08:38,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:08:38,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:08:38,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:08:38,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (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 11:08:38,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:08:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:08:38,780 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-21 11:08:38,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:08:38,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 11:08:38,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:08:38,782 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-21 11:08:38,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:08:38,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:08:38,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:08:39,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:08:39,061 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:08:39,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:39 BoogieIcfgContainer [2020-07-21 11:08:39,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:08:39,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:08:39,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:08:39,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:08:39,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:38" (1/3) ... [2020-07-21 11:08:39,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fee6c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:39, skipping insertion in model container [2020-07-21 11:08:39,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:38" (2/3) ... [2020-07-21 11:08:39,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fee6c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:39, skipping insertion in model container [2020-07-21 11:08:39,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:39" (3/3) ... [2020-07-21 11:08:39,084 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-07-21 11:08:39,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:08:39,117 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:08:39,138 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:08:39,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:08:39,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:08:39,181 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:08:39,181 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:08:39,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:08:39,182 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:08:39,182 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:08:39,182 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:08:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 11:08:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:08:39,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:39,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:39,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-21 11:08:39,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:39,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327271716] [2020-07-21 11:08:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:08:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:39,542 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 11:08:39,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:08:39,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327271716] [2020-07-21 11:08:39,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:08:39,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:08:39,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864519879] [2020-07-21 11:08:39,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:08:39,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:39,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:08:39,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:08:39,584 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 11:08:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:39,698 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 11:08:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:08:39,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 11:08:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:39,722 INFO L225 Difference]: With dead ends: 32 [2020-07-21 11:08:39,722 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 11:08:39,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:08:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 11:08:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 11:08:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:08:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 11:08:39,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 11:08:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:39,822 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 11:08:39,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:08:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 11:08:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:08:39,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:39,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:40,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:40,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-21 11:08:40,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:40,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740149437] [2020-07-21 11:08:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:08:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:08:40,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:08:40,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740149437] [2020-07-21 11:08:40,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:40,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:08:40,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502240722] [2020-07-21 11:08:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:08:40,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:40,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:08:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:08:40,596 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-07-21 11:08:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:42,837 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-21 11:08:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:08:42,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-21 11:08:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:42,843 INFO L225 Difference]: With dead ends: 30 [2020-07-21 11:08:42,844 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 11:08:42,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:08:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 11:08:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 11:08:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 11:08:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 11:08:42,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-07-21 11:08:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:42,858 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 11:08:42,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:08:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 11:08:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:08:42,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:42,860 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:43,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:43,067 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times [2020-07-21 11:08:43,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:43,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71465199] [2020-07-21 11:08:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 11:08:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:08:43,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:08:44,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71465199] [2020-07-21 11:08:44,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:44,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 11:08:44,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114396423] [2020-07-21 11:08:44,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 11:08:44,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 11:08:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:08:44,292 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states. [2020-07-21 11:08:46,666 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-07-21 11:08:48,934 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2020-07-21 11:08:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:08:49,169 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 11:08:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:08:49,171 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-21 11:08:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:08:49,173 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:08:49,173 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 11:08:49,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:08:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 11:08:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 11:08:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 11:08:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-21 11:08:49,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-07-21 11:08:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:08:49,189 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-21 11:08:49,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 11:08:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-21 11:08:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 11:08:49,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:08:49,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:08:49,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:08:49,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:08:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:08:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times [2020-07-21 11:08:49,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:08:49,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284728638] [2020-07-21 11:08:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:08:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:08:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 11:08:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:08:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 11:08:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:08:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 73 refuted. 4 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-21 11:08:58,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284728638] [2020-07-21 11:08:58,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:08:58,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 11:08:58,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079648483] [2020-07-21 11:08:58,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 11:08:58,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:08:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 11:08:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1073, Unknown=3, NotChecked=0, Total=1260 [2020-07-21 11:08:58,288 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states. [2020-07-21 11:09:05,706 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 11:09:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:09:17,227 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-07-21 11:09:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 11:09:17,229 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 55 [2020-07-21 11:09:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:09:17,232 INFO L225 Difference]: With dead ends: 66 [2020-07-21 11:09:17,232 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:09:17,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=382, Invalid=1867, Unknown=7, NotChecked=0, Total=2256 [2020-07-21 11:09:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:09:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-21 11:09:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 11:09:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-21 11:09:17,252 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-07-21 11:09:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:09:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-21 11:09:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 11:09:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-21 11:09:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-21 11:09:17,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:09:17,260 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:09:17,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:09:17,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:09:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:09:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 4 times [2020-07-21 11:09:17,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:09:17,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535396739] [2020-07-21 11:09:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:09:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:09:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 11:09:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:09:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 11:09:18,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:09:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 334 refuted. 11 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 11:09:54,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535396739] [2020-07-21 11:09:54,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:09:54,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 11:09:54,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41179565] [2020-07-21 11:09:54,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 11:09:54,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:09:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 11:09:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3925, Unknown=15, NotChecked=0, Total=4556 [2020-07-21 11:09:54,532 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 68 states. [2020-07-21 11:09:59,657 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 13 [2020-07-21 11:10:04,305 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2020-07-21 11:10:07,697 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 13 [2020-07-21 11:10:15,933 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2020-07-21 11:10:20,705 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 68 DAG size of output: 13 [2020-07-21 11:10:23,981 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 11 [2020-07-21 11:10:28,127 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-21 11:10:34,146 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 11:10:39,256 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-21 11:10:41,590 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 11:10:46,399 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 11:10:49,355 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 11:10:56,003 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 11:11:02,167 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 11:11:07,205 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-21 11:11:13,344 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 11:11:27,189 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 11:11:32,573 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 11:11:34,366 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 11:11:47,945 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 11:11:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:11:52,979 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-07-21 11:11:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-21 11:11:52,979 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 103 [2020-07-21 11:11:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:11:52,983 INFO L225 Difference]: With dead ends: 114 [2020-07-21 11:11:52,984 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 11:11:52,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 152.2s TimeCoverageRelationStatistics Valid=1523, Invalid=7575, Unknown=22, NotChecked=0, Total=9120 [2020-07-21 11:11:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 11:11:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-21 11:11:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 11:11:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-21 11:11:53,005 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-07-21 11:11:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:11:53,006 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-21 11:11:53,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 11:11:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-21 11:11:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 11:11:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:11:53,011 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:11:53,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:11:53,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:11:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:11:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -935230737, now seen corresponding path program 5 times [2020-07-21 11:11:53,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:11:53,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595189843] [2020-07-21 11:11:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:11:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:11:53,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 131 conjunts are in the unsatisfiable core [2020-07-21 11:11:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:11:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 11:11:56,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:14:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1394 refuted. 63 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-07-21 11:14:13,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595189843] [2020-07-21 11:14:13,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:14:13,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 11:14:13,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708990450] [2020-07-21 11:14:13,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 11:14:13,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:13,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 11:14:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=14991, Unknown=53, NotChecked=0, Total=17292 [2020-07-21 11:14:13,132 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 132 states. [2020-07-21 11:15:03,453 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 158 DAG size of output: 13 [2020-07-21 11:15:51,688 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 156 DAG size of output: 11 [2020-07-21 11:16:34,604 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 153 DAG size of output: 13 [2020-07-21 11:17:29,446 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 151 DAG size of output: 11 [2020-07-21 11:18:27,116 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 11:19:16,511 WARN L193 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2020-07-21 11:20:03,664 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 143 DAG size of output: 13 [2020-07-21 11:20:48,432 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 141 DAG size of output: 11 [2020-07-21 11:21:36,281 WARN L193 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 138 DAG size of output: 13 [2020-07-21 11:22:27,532 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 136 DAG size of output: 11 [2020-07-21 11:23:05,513 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 133 DAG size of output: 13