/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:56:46,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:56:46,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:56:46,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:56:46,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:56:46,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:56:46,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:56:46,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:56:46,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:56:46,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:56:46,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:56:46,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:56:46,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:56:46,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:56:46,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:56:46,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:56:46,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:56:46,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:56:46,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:56:46,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:56:46,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:56:46,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:56:46,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:56:46,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:56:46,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:56:46,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:56:46,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:56:46,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:56:46,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:56:46,742 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:56:46,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:56:46,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:56:46,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:56:46,744 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:56:46,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:56:46,745 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:56:46,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:56:46,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:56:46,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:56:46,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:56:46,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:56:46,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:56:46,746 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:56:46,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:56:46,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:56:46,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:56:46,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:56:46,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:56:46,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:56:46,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:56:46,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:46,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:56:46,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:56:46,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:56:46,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:56:46,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:46,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:56:46,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:56:46,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:56:47,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:56:47,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:56:47,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:56:47,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:56:47,106 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:56:47,107 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-07-20 16:56:47,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5f894d1/0c7bc7dfb3be4295987c8a84d7d82b35/FLAGef1c2d14e [2020-07-20 16:56:47,745 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:56:47,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2020-07-20 16:56:47,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5f894d1/0c7bc7dfb3be4295987c8a84d7d82b35/FLAGef1c2d14e [2020-07-20 16:56:48,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5f894d1/0c7bc7dfb3be4295987c8a84d7d82b35 [2020-07-20 16:56:48,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:56:48,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:56:48,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:48,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:56:48,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:56:48,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35edd3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48, skipping insertion in model container [2020-07-20 16:56:48,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:56:48,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:56:48,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:48,371 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:56:48,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:56:48,398 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:56:48,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48 WrapperNode [2020-07-20 16:56:48,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:56:48,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:56:48,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:56:48,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:56:48,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... [2020-07-20 16:56:48,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:56:48,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:56:48,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:56:48,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:56:48,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:56:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:56:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:56:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 16:56:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:56:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:56:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:56:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 16:56:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:56:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:56:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:56:48,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:56:48,737 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:56:48,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:48 BoogieIcfgContainer [2020-07-20 16:56:48,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:56:48,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:56:48,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:56:48,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:56:48,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:56:48" (1/3) ... [2020-07-20 16:56:48,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a254320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:48, skipping insertion in model container [2020-07-20 16:56:48,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:56:48" (2/3) ... [2020-07-20 16:56:48,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a254320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:56:48, skipping insertion in model container [2020-07-20 16:56:48,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:56:48" (3/3) ... [2020-07-20 16:56:48,748 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2020-07-20 16:56:48,756 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:56:48,762 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:56:48,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:56:48,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:56:48,799 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:56:48,799 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:56:48,799 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:56:48,799 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:56:48,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:56:48,800 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:56:48,800 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:56:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 16:56:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 16:56:48,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:48,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:48,822 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 16:56:48,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:48,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441024521] [2020-07-20 16:56:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:48,906 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:48,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:56:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:56:49,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:56:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441024521] [2020-07-20 16:56:49,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:56:49,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:56:49,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646685059] [2020-07-20 16:56:49,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:56:49,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:56:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:56:49,051 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 16:56:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:49,128 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 16:56:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:56:49,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 16:56:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:49,139 INFO L225 Difference]: With dead ends: 30 [2020-07-20 16:56:49,139 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 16:56:49,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:56:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 16:56:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 16:56:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 16:56:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 16:56:49,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 16:56:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:49,188 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 16:56:49,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:56:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 16:56:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 16:56:49,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:49,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:49,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:49,404 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 16:56:49,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:49,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746699696] [2020-07-20 16:56:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:49,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:56:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 16:56:49,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:49,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:49,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:56:49,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746699696] [2020-07-20 16:56:49,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:49,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 16:56:49,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694213098] [2020-07-20 16:56:49,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 16:56:49,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 16:56:49,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 16:56:49,727 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 16:56:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:49,799 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 16:56:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:56:49,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 16:56:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:49,802 INFO L225 Difference]: With dead ends: 25 [2020-07-20 16:56:49,802 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 16:56:49,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 16:56:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 16:56:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 16:56:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 16:56:49,811 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 16:56:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:49,812 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 16:56:49,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 16:56:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 16:56:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 16:56:49,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:49,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:50,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:50,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 16:56:50,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:50,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118557407] [2020-07-20 16:56:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:50,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:50,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 16:56:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 16:56:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:50,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 16:56:50,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118557407] [2020-07-20 16:56:50,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:50,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 16:56:50,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107229865] [2020-07-20 16:56:50,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 16:56:50,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 16:56:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 16:56:50,575 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 16:56:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:50,682 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 16:56:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 16:56:50,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 16:56:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:50,687 INFO L225 Difference]: With dead ends: 28 [2020-07-20 16:56:50,687 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 16:56:50,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 16:56:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 16:56:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 16:56:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 16:56:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 16:56:50,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 16:56:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:50,708 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 16:56:50,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 16:56:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 16:56:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 16:56:50,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:50,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:50,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:50,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 16:56:50,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:50,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171940735] [2020-07-20 16:56:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:50,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:50,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:56:50,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:56:51,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:51,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:56:51,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171940735] [2020-07-20 16:56:51,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 16:56:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590800492] [2020-07-20 16:56:51,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 16:56:51,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 16:56:51,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 16:56:51,695 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 16:56:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:51,792 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 16:56:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:56:51,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 16:56:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:51,795 INFO L225 Difference]: With dead ends: 31 [2020-07-20 16:56:51,795 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 16:56:51,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 16:56:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 16:56:51,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 16:56:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 16:56:51,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 16:56:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:51,804 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 16:56:51,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 16:56:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 16:56:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 16:56:51,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:51,805 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:52,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:52,016 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 16:56:52,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:52,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168671391] [2020-07-20 16:56:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:52,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:52,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:56:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 16:56:52,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:52,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:52,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 16:56:53,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168671391] [2020-07-20 16:56:53,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:53,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 16:56:53,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117253249] [2020-07-20 16:56:53,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 16:56:53,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 16:56:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 16:56:53,018 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 16:56:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:53,130 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 16:56:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:56:53,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 16:56:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:53,137 INFO L225 Difference]: With dead ends: 34 [2020-07-20 16:56:53,137 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 16:56:53,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 16:56:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 16:56:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 16:56:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 16:56:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 16:56:53,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 16:56:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:53,146 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 16:56:53,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 16:56:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 16:56:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 16:56:53,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:53,148 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:53,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:53,358 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 16:56:53,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:53,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787684936] [2020-07-20 16:56:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:53,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:56:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 16:56:53,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:54,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:56:54,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787684936] [2020-07-20 16:56:54,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:54,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 16:56:54,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880974575] [2020-07-20 16:56:54,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 16:56:54,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 16:56:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 16:56:54,799 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 16:56:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:54,940 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 16:56:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 16:56:54,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 16:56:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:54,942 INFO L225 Difference]: With dead ends: 37 [2020-07-20 16:56:54,942 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 16:56:54,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:56:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 16:56:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 16:56:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 16:56:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 16:56:54,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 16:56:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:54,950 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 16:56:54,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 16:56:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 16:56:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 16:56:54,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:54,952 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:55,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:55,157 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 16:56:55,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:55,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504974828] [2020-07-20 16:56:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:55,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:55,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 16:56:55,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 16:56:55,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:56,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:56,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 16:56:57,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504974828] [2020-07-20 16:56:57,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:56:57,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 16:56:57,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214332846] [2020-07-20 16:56:57,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:56:57,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:56:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:56:57,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:56:57,305 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 16:56:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:56:57,478 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 16:56:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 16:56:57,479 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 16:56:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:56:57,481 INFO L225 Difference]: With dead ends: 40 [2020-07-20 16:56:57,481 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 16:56:57,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:56:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 16:56:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 16:56:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 16:56:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 16:56:57,489 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 16:56:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:56:57,489 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 16:56:57,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:56:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 16:56:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 16:56:57,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:56:57,491 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:56:57,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:57,702 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:56:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:56:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 16:56:57,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:56:57,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868602747] [2020-07-20 16:56:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:56:57,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:56:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:56:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 16:56:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:56:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 16:56:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:56:59,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:56:59,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 16:57:00,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868602747] [2020-07-20 16:57:00,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:00,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 16:57:00,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178684115] [2020-07-20 16:57:00,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:57:00,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:57:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:57:00,863 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 16:57:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:01,066 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 16:57:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:57:01,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 16:57:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:01,068 INFO L225 Difference]: With dead ends: 43 [2020-07-20 16:57:01,068 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 16:57:01,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:57:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 16:57:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 16:57:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 16:57:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 16:57:01,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 16:57:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:01,076 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 16:57:01,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:57:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 16:57:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 16:57:01,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:01,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:01,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:01,285 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 16:57:01,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:01,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632121589] [2020-07-20 16:57:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:01,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:57:01,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:01,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 16:57:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 16:57:01,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:57:03,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:04,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:04,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 16:57:05,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632121589] [2020-07-20 16:57:05,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:05,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 16:57:05,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985078771] [2020-07-20 16:57:05,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:57:05,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:57:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 16:57:05,673 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 16:57:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:05,929 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 16:57:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 16:57:05,929 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 16:57:05,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:05,931 INFO L225 Difference]: With dead ends: 46 [2020-07-20 16:57:05,931 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 16:57:05,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 16:57:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 16:57:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 16:57:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 16:57:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 16:57:05,940 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 16:57:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:05,941 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 16:57:05,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:57:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 16:57:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 16:57:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:05,943 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:06,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:06,160 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 16:57:06,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:06,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361129700] [2020-07-20 16:57:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:06,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:57:06,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 16:57:06,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 16:57:06,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:57:09,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:09,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:10,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:11,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:11,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:11,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:11,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:11,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:12,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:12,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:12,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:12,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:57:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 16:57:12,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361129700] [2020-07-20 16:57:12,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:12,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 24 [2020-07-20 16:57:12,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442526952] [2020-07-20 16:57:12,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 16:57:12,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 16:57:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:57:12,233 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-20 16:57:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:12,447 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 16:57:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 16:57:12,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-20 16:57:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:12,451 INFO L225 Difference]: With dead ends: 49 [2020-07-20 16:57:12,451 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 16:57:12,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:57:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 16:57:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 16:57:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 16:57:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 16:57:12,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 16:57:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:12,459 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 16:57:12,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 16:57:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 16:57:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 16:57:12,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:12,461 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:12,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:12,670 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 16:57:12,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:12,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780420218] [2020-07-20 16:57:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:12,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:57:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 16:57:12,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 16:57:13,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:57:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 16:57:14,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780420218] [2020-07-20 16:57:14,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:57:14,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-07-20 16:57:14,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6018632] [2020-07-20 16:57:14,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 16:57:14,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 16:57:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:57:14,390 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-07-20 16:57:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:14,692 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 16:57:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 16:57:14,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-07-20 16:57:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:14,695 INFO L225 Difference]: With dead ends: 52 [2020-07-20 16:57:14,695 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 16:57:14,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-07-20 16:57:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 16:57:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 16:57:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 16:57:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 16:57:14,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 16:57:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:14,705 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 16:57:14,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 16:57:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 16:57:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 16:57:14,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:57:14,706 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:57:14,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:14,923 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:57:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:57:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 16:57:14,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:57:14,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978141146] [2020-07-20 16:57:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:15,119 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:57:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:57:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 16:57:15,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:57:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 16:57:15,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:57:15,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978141146] [2020-07-20 16:57:15,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:57:15,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-20 16:57:15,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910915558] [2020-07-20 16:57:15,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 16:57:15,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:57:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 16:57:15,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:57:15,349 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-07-20 16:57:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:57:15,576 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-07-20 16:57:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 16:57:15,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-07-20 16:57:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:57:15,577 INFO L225 Difference]: With dead ends: 48 [2020-07-20 16:57:15,578 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:57:15,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:57:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:57:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:57:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:57:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:57:15,581 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-07-20 16:57:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:57:15,582 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:57:15,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 16:57:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:57:15,582 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:57:15,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:57:15,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:57:15,861 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:57:15,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:57:15,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:57:15,861 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:57:15,861 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:57:15,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:57:15,862 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-20 16:57:15,862 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 16:57:15,862 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 16:57:15,862 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 16:57:15,862 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-20 16:57:15,863 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2020-07-20 16:57:15,863 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 16:57:15,863 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 16:57:15,863 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 16:57:15,863 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 16:57:15,863 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 16:57:15,863 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2020-07-20 16:57:15,864 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 16:57:15,864 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 16:57:15,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:57:15 BoogieIcfgContainer [2020-07-20 16:57:15,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:57:15,875 INFO L168 Benchmark]: Toolchain (without parser) took 27758.73 ms. Allocated memory was 143.1 MB in the beginning and 443.5 MB in the end (delta: 300.4 MB). Free memory was 101.4 MB in the beginning and 348.4 MB in the end (delta: -247.0 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,875 INFO L168 Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.02 ms. Allocated memory is still 143.1 MB. Free memory was 101.0 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,877 INFO L168 Benchmark]: Boogie Preprocessor took 20.19 ms. Allocated memory is still 143.1 MB. Free memory was 91.9 MB in the beginning and 90.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,878 INFO L168 Benchmark]: RCFGBuilder took 319.87 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 90.4 MB in the beginning and 167.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,879 INFO L168 Benchmark]: TraceAbstraction took 27130.13 ms. Allocated memory was 199.8 MB in the beginning and 443.5 MB in the end (delta: 243.8 MB). Free memory was 167.8 MB in the beginning and 348.4 MB in the end (delta: -180.6 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-07-20 16:57:15,882 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.02 ms. Allocated memory is still 143.1 MB. Free memory was 101.0 MB in the beginning and 91.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.19 ms. Allocated memory is still 143.1 MB. Free memory was 91.9 MB in the beginning and 90.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.87 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 90.4 MB in the beginning and 167.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27130.13 ms. Allocated memory was 199.8 MB in the beginning and 443.5 MB in the end (delta: 243.8 MB). Free memory was 167.8 MB in the beginning and 348.4 MB in the end (delta: -180.6 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 26.9s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 514 SDslu, 1542 SDs, 0 SdLazy, 830 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1067 GetRequests, 717 SyntacticMatches, 109 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 552 NumberOfCodeBlocks, 448 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 990 ConstructedInterpolants, 0 QuantifiedInterpolants, 142320 SizeOfPredicates, 78 NumberOfNonLiveVariables, 1192 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1299/2794 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...