/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:30:18,013 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 22:30:18,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:30:18,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:30:18,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:30:18,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:30:18,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:30:18,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:30:18,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:30:18,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:30:18,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:30:18,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:30:18,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:30:18,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:30:18,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:30:18,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:30:18,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:30:18,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:30:18,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:30:18,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:30:18,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:30:18,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:30:18,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:30:18,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:30:18,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:30:18,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:30:18,066 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 22:30:18,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:30:18,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:30:18,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:30:18,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:30:18,096 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:30:18,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:30:18,097 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:30:18,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:30:18,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:30:18,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:30:18,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:30:18,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:30:18,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:30:18,099 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:30:18,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:30:18,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:30:18,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:30:18,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:30:18,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:30:18,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:30:18,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:30:18,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:30:18,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:30:18,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:30:18,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:30:18,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:30:18,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:18,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:30:18,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:30:18,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:30:18,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:30:18,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:30:18,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:30:18,420 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:30:18,421 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:30:18,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 22:30:18,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/751d6c451/3c30e3dec3154ae3947be868b9034a30/FLAG3eaabdca0 [2020-07-20 22:30:18,960 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:30:18,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_variant.i [2020-07-20 22:30:18,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/751d6c451/3c30e3dec3154ae3947be868b9034a30/FLAG3eaabdca0 [2020-07-20 22:30:19,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/751d6c451/3c30e3dec3154ae3947be868b9034a30 [2020-07-20 22:30:19,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:30:19,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:30:19,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:30:19,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:30:19,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:30:19,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59295f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19, skipping insertion in model container [2020-07-20 22:30:19,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:30:19,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:30:19,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:30:19,503 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:30:19,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:30:19,533 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:30:19,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19 WrapperNode [2020-07-20 22:30:19,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:30:19,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:30:19,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:30:19,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:30:19,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (1/1) ... [2020-07-20 22:30:19,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:30:19,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:30:19,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:30:19,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:30:19,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (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 22:30:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:30:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:30:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:30:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:30:19,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:30:19,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:30:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:30:19,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:30:19,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:30:19,876 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:30:19,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:30:19 BoogieIcfgContainer [2020-07-20 22:30:19,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:30:19,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:30:19,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:30:19,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:30:19,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:30:19" (1/3) ... [2020-07-20 22:30:19,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe66e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:30:19, skipping insertion in model container [2020-07-20 22:30:19,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:30:19" (2/3) ... [2020-07-20 22:30:19,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe66e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:30:19, skipping insertion in model container [2020-07-20 22:30:19,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:30:19" (3/3) ... [2020-07-20 22:30:19,887 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005_variant.i [2020-07-20 22:30:19,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:30:19,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:30:19,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:30:19,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:30:19,993 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:30:19,993 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:30:19,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:30:19,996 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:30:19,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:30:19,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:30:19,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:30:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:30:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 22:30:20,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:20,043 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:20,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-20 22:30:20,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:20,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741378853] [2020-07-20 22:30:20,057 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 22:30:20,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:30:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 22:30:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:20,153 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 22:30:20,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:30:20,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741378853] [2020-07-20 22:30:20,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:30:20,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:30:20,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103238439] [2020-07-20 22:30:20,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:30:20,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:30:20,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:20,174 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 22:30:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:20,216 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-20 22:30:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:30:20,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 22:30:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:20,228 INFO L225 Difference]: With dead ends: 32 [2020-07-20 22:30:20,228 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 22:30:20,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:30:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 22:30:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 22:30:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 22:30:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 22:30:20,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 22:30:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:20,273 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 22:30:20,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:30:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 22:30:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:30:20,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:20,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:20,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:20,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-20 22:30:20,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:20,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112454571] [2020-07-20 22:30:20,492 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 22:30:20,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:20,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 22:30:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:20,644 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:20,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112454571] [2020-07-20 22:30:20,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:20,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 22:30:20,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079740660] [2020-07-20 22:30:20,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:30:20,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:20,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:30:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:30:20,844 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-07-20 22:30:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:21,035 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 22:30:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:30:21,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-07-20 22:30:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:21,037 INFO L225 Difference]: With dead ends: 21 [2020-07-20 22:30:21,038 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 22:30:21,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 22:30:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 22:30:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 22:30:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 22:30:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 22:30:21,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 22:30:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:21,046 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 22:30:21,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:30:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 22:30:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:30:21,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:21,048 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:21,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:21,261 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 2 times [2020-07-20 22:30:21,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:21,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385951107] [2020-07-20 22:30:21,264 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 22:30:21,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:21,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:21,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 22:30:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:21,394 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:21,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:21,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:21,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385951107] [2020-07-20 22:30:21,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:21,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 22:30:21,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527683839] [2020-07-20 22:30:21,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:30:21,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:30:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:30:21,592 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2020-07-20 22:30:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:22,019 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-07-20 22:30:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:30:22,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2020-07-20 22:30:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:22,022 INFO L225 Difference]: With dead ends: 25 [2020-07-20 22:30:22,022 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 22:30:22,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 22:30:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 22:30:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 22:30:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 22:30:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 22:30:22,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2020-07-20 22:30:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:22,036 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 22:30:22,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:30:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 22:30:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 22:30:22,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:22,038 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:22,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:22,239 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash -43331668, now seen corresponding path program 3 times [2020-07-20 22:30:22,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:22,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254352910] [2020-07-20 22:30:22,240 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 22:30:22,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:22,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 22:30:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:22,446 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:22,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:22,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:22,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254352910] [2020-07-20 22:30:22,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:22,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-07-20 22:30:22,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154297391] [2020-07-20 22:30:22,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 22:30:22,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 22:30:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-07-20 22:30:22,842 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 23 states. [2020-07-20 22:30:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:23,985 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-20 22:30:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 22:30:23,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2020-07-20 22:30:23,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:23,987 INFO L225 Difference]: With dead ends: 33 [2020-07-20 22:30:23,987 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 22:30:23,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 22:30:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 22:30:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 22:30:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:30:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 22:30:24,002 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-07-20 22:30:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:24,004 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 22:30:24,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 22:30:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 22:30:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:30:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:24,006 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:24,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:24,221 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:24,222 INFO L82 PathProgramCache]: Analyzing trace with hash 101712172, now seen corresponding path program 4 times [2020-07-20 22:30:24,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:24,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199880351] [2020-07-20 22:30:24,224 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 22:30:24,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:30:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:24,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-20 22:30:24,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:24,657 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:24,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:24,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:25,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199880351] [2020-07-20 22:30:25,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:25,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2020-07-20 22:30:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617874565] [2020-07-20 22:30:25,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 22:30:25,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 22:30:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 22:30:25,727 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 40 states. [2020-07-20 22:30:26,590 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-20 22:30:26,854 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-07-20 22:30:27,053 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 22:30:27,273 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-07-20 22:30:29,378 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-20 22:30:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:29,388 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2020-07-20 22:30:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 22:30:29,396 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 26 [2020-07-20 22:30:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:29,397 INFO L225 Difference]: With dead ends: 49 [2020-07-20 22:30:29,397 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 22:30:29,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1203, Invalid=4199, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 22:30:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 22:30:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 22:30:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 22:30:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-07-20 22:30:29,424 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 26 [2020-07-20 22:30:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:29,424 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-07-20 22:30:29,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 22:30:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-07-20 22:30:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 22:30:29,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:29,427 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:29,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:29,638 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -868359124, now seen corresponding path program 5 times [2020-07-20 22:30:29,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:29,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993065595] [2020-07-20 22:30:29,642 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 22:30:29,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:30:29,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:29,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-20 22:30:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:30,789 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:31,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:30:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:34,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993065595] [2020-07-20 22:30:34,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:30:34,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72 [2020-07-20 22:30:34,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168811973] [2020-07-20 22:30:34,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-20 22:30:34,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:30:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-20 22:30:34,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=4002, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 22:30:34,158 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 72 states. [2020-07-20 22:30:36,922 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 22:30:37,545 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 140 [2020-07-20 22:30:38,114 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 22:30:38,627 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 130 [2020-07-20 22:30:39,175 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 22:30:39,793 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 22:30:40,309 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 22:30:40,814 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 22:30:41,312 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 22:30:41,801 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 22:30:42,271 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 22:30:42,723 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 22:30:43,204 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 22:30:43,630 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 22:30:44,049 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 22:30:44,458 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 22:30:44,875 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 22:30:45,266 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:30:45,643 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 22:30:46,004 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 22:30:46,339 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 22:30:50,059 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 22:30:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:30:50,083 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2020-07-20 22:30:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-20 22:30:50,084 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 42 [2020-07-20 22:30:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:30:50,085 INFO L225 Difference]: With dead ends: 81 [2020-07-20 22:30:50,086 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 22:30:50,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=4419, Invalid=14487, Unknown=0, NotChecked=0, Total=18906 [2020-07-20 22:30:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 22:30:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 22:30:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 22:30:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-07-20 22:30:50,113 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42 [2020-07-20 22:30:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:30:50,114 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-07-20 22:30:50,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-20 22:30:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-07-20 22:30:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-20 22:30:50,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:30:50,117 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:30:50,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:30:50,331 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:30:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:30:50,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1445440044, now seen corresponding path program 6 times [2020-07-20 22:30:50,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:30:50,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913563404] [2020-07-20 22:30:50,333 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 22:30:50,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:30:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:30:50,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-20 22:30:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:30:54,334 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:30:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:30:54,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:30:54,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:31:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:31:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913563404] [2020-07-20 22:31:06,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:31:06,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2020-07-20 22:31:06,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362994532] [2020-07-20 22:31:06,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-07-20 22:31:06,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:31:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-07-20 22:31:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4241, Invalid=13849, Unknown=0, NotChecked=0, Total=18090 [2020-07-20 22:31:06,950 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 135 states. [2020-07-20 22:31:16,818 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 22:31:18,494 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 428 DAG size of output: 270 [2020-07-20 22:31:20,777 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2020-07-20 22:31:22,217 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 416 DAG size of output: 258 [2020-07-20 22:31:24,432 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 22:31:26,858 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 22:31:29,127 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 22:31:31,396 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 22:31:33,589 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 379 [2020-07-20 22:31:35,772 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 22:31:37,941 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2020-07-20 22:31:40,088 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-07-20 22:31:42,275 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-07-20 22:31:44,492 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-07-20 22:31:46,725 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-07-20 22:31:48,789 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-07-20 22:31:50,856 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2020-07-20 22:31:52,922 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-07-20 22:31:54,996 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-07-20 22:31:57,040 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-07-20 22:31:59,046 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-07-20 22:32:01,027 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-07-20 22:32:03,017 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-07-20 22:32:05,008 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2020-07-20 22:32:07,003 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2020-07-20 22:32:09,085 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 22:32:11,189 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 22:32:13,135 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 255 [2020-07-20 22:32:15,067 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-07-20 22:32:17,118 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 22:32:19,087 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-07-20 22:32:20,970 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-07-20 22:32:22,895 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-07-20 22:32:24,614 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-07-20 22:32:26,297 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-07-20 22:32:27,944 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-07-20 22:32:29,560 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 22:32:31,187 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 22:32:32,746 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 22:32:34,309 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 22:32:35,812 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-07-20 22:32:37,279 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-20 22:32:38,693 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-07-20 22:32:40,075 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-20 22:32:41,463 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-07-20 22:32:42,781 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-07-20 22:32:44,038 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 22:32:45,260 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 22:32:46,465 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-20 22:32:47,602 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:32:48,848 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 22:32:50,110 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 22:32:51,126 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 22:32:52,126 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 22:32:53,078 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 22:32:54,015 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 22:32:55,009 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 22:32:56,029 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 22:32:56,906 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 22:32:57,791 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 22:33:05,064 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 415 [2020-07-20 22:33:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:05,086 INFO L93 Difference]: Finished difference Result 145 states and 208 transitions. [2020-07-20 22:33:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-20 22:33:05,088 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 74 [2020-07-20 22:33:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:05,090 INFO L225 Difference]: With dead ends: 145 [2020-07-20 22:33:05,092 INFO L226 Difference]: Without dead ends: 139 [2020-07-20 22:33:05,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8959 ImplicationChecksByTransitivity, 128.4s TimeCoverageRelationStatistics Valid=16988, Invalid=52972, Unknown=0, NotChecked=0, Total=69960 [2020-07-20 22:33:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-20 22:33:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-07-20 22:33:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-07-20 22:33:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-07-20 22:33:05,151 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 74 [2020-07-20 22:33:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:05,152 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-07-20 22:33:05,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 135 states. [2020-07-20 22:33:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-07-20 22:33:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-20 22:33:05,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:05,154 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:05,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:05,368 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1338821076, now seen corresponding path program 7 times [2020-07-20 22:33:05,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:05,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164475763] [2020-07-20 22:33:05,370 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 22:33:05,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:05,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:05,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 770 conjunts are in the unsatisfiable core [2020-07-20 22:33:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:31,271 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 22:33:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:32,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:35:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:35:23,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164475763] [2020-07-20 22:35:23,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:35:23,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 263 [2020-07-20 22:35:23,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070249382] [2020-07-20 22:35:23,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 263 states [2020-07-20 22:35:23,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:35:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2020-07-20 22:35:23,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16657, Invalid=52249, Unknown=0, NotChecked=0, Total=68906 [2020-07-20 22:35:23,587 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 263 states. [2020-07-20 22:38:01,439 WARN L193 SmtUtils]: Spent 9.21 s on a formula simplification that was a NOOP. DAG size: 843 [2020-07-20 22:38:13,102 WARN L193 SmtUtils]: Spent 9.18 s on a formula simplification. DAG size of input: 844 DAG size of output: 526 [2020-07-20 22:39:12,447 WARN L193 SmtUtils]: Spent 7.49 s on a formula simplification that was a NOOP. DAG size: 827 [2020-07-20 22:39:22,991 WARN L193 SmtUtils]: Spent 8.93 s on a formula simplification. DAG size of input: 832 DAG size of output: 514 [2020-07-20 22:40:25,155 WARN L193 SmtUtils]: Spent 7.99 s on a formula simplification that was a NOOP. DAG size: 821 [2020-07-20 22:41:30,405 WARN L193 SmtUtils]: Spent 8.90 s on a formula simplification that was a NOOP. DAG size: 814 [2020-07-20 22:42:36,750 WARN L193 SmtUtils]: Spent 8.47 s on a formula simplification that was a NOOP. DAG size: 808 [2020-07-20 22:43:32,851 WARN L193 SmtUtils]: Spent 6.21 s on a formula simplification that was a NOOP. DAG size: 801 [2020-07-20 22:44:23,095 WARN L193 SmtUtils]: Spent 6.88 s on a formula simplification that was a NOOP. DAG size: 795