/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:23:16,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:23:16,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:23:16,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:23:16,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:23:16,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:23:16,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:23:16,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:23:16,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:23:16,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:23:16,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:23:16,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:23:16,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:23:16,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:23:16,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:23:16,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:23:16,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:23:16,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:23:16,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:23:16,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:23:16,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:23:16,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:23:16,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:23:16,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:23:16,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:23:16,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:23:16,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:23:16,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:23:16,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:23:16,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:23:16,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:23:16,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:23:16,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:23:16,912 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:23:16,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:23:16,912 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:23:16,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:23:16,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:23:16,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:23:16,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:23:16,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:23:16,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:23:16,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:23:16,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:23:16,914 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:23:16,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:23:16,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:23:16,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:23:16,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:23:16,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:23:16,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:16,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:23:16,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:23:16,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:23:16,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:23:16,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:16,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:23:16,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:23:16,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:23:17,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:23:17,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:23:17,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:23:17,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:23:17,259 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:23:17,260 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 23:23:17,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8c41e46/24504ceaf14e489cbc6e48a27067631b/FLAG5d6455e74 [2020-07-21 23:23:17,756 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:23:17,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 23:23:17,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8c41e46/24504ceaf14e489cbc6e48a27067631b/FLAG5d6455e74 [2020-07-21 23:23:18,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8c41e46/24504ceaf14e489cbc6e48a27067631b [2020-07-21 23:23:18,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:23:18,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:23:18,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:18,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:23:18,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:23:18,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca65502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18, skipping insertion in model container [2020-07-21 23:23:18,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:23:18,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:23:18,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:18,427 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:23:18,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:18,454 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:23:18,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18 WrapperNode [2020-07-21 23:23:18,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:18,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:23:18,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:23:18,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:23:18,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... [2020-07-21 23:23:18,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:23:18,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:23:18,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:23:18,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:23:18,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:18,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:23:18,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:23:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:23:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:23:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:23:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:23:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:23:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:23:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:23:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:23:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:23:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:23:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:23:18,886 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:23:18,886 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:23:18,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:18 BoogieIcfgContainer [2020-07-21 23:23:18,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:23:18,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:23:18,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:23:18,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:23:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:18" (1/3) ... [2020-07-21 23:23:18,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3e9015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:18, skipping insertion in model container [2020-07-21 23:23:18,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:18" (2/3) ... [2020-07-21 23:23:18,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3e9015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:18, skipping insertion in model container [2020-07-21 23:23:18,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:18" (3/3) ... [2020-07-21 23:23:18,905 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-21 23:23:18,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:23:18,950 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:23:18,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:23:19,012 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:23:19,012 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:23:19,013 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:23:19,013 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:23:19,013 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:23:19,013 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:23:19,013 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:23:19,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:23:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 23:23:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:23:19,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:19,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:19,041 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-21 23:23:19,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:19,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775853019] [2020-07-21 23:23:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:19,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:23:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:19,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:19,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775853019] [2020-07-21 23:23:19,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:19,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:23:19,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362245285] [2020-07-21 23:23:19,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:23:19,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:23:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:23:19,181 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 23:23:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:19,209 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-21 23:23:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:23:19,212 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 23:23:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:19,220 INFO L225 Difference]: With dead ends: 37 [2020-07-21 23:23:19,221 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 23:23:19,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:23:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 23:23:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 23:23:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 23:23:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-21 23:23:19,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-21 23:23:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:19,266 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-21 23:23:19,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:23:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-21 23:23:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:23:19,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:19,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:19,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,482 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-21 23:23:19,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:19,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374479728] [2020-07-21 23:23:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:19,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:19,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:23:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:19,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374479728] [2020-07-21 23:23:19,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:19,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:23:19,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137014753] [2020-07-21 23:23:19,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:23:19,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:19,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:23:19,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:19,553 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-21 23:23:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:19,579 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 23:23:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:23:19,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 23:23:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:19,581 INFO L225 Difference]: With dead ends: 20 [2020-07-21 23:23:19,581 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:23:19,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:23:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:23:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:23:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 23:23:19,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-21 23:23:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:19,590 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 23:23:19,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:23:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 23:23:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:23:19,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:19,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:19,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,807 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-21 23:23:19,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:19,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067826479] [2020-07-21 23:23:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:19,848 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:23:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:19,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:19,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067826479] [2020-07-21 23:23:19,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:19,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:23:19,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574697078] [2020-07-21 23:23:19,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:23:19,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:23:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:19,869 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 23:23:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:19,881 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-21 23:23:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:23:19,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 23:23:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:19,883 INFO L225 Difference]: With dead ends: 25 [2020-07-21 23:23:19,883 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 23:23:19,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 23:23:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 23:23:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 23:23:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 23:23:19,889 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-21 23:23:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:19,890 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 23:23:19,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:23:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 23:23:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 23:23:19,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:19,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:20,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:20,106 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:20,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-21 23:23:20,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:20,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520831173] [2020-07-21 23:23:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:20,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:20,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:23:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520831173] [2020-07-21 23:23:20,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:20,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 23:23:20,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045650537] [2020-07-21 23:23:20,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:23:20,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:23:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:23:20,256 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2020-07-21 23:23:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:20,306 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-07-21 23:23:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:23:20,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-07-21 23:23:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:20,308 INFO L225 Difference]: With dead ends: 27 [2020-07-21 23:23:20,308 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 23:23:20,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:23:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 23:23:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 23:23:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 23:23:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 23:23:20,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-07-21 23:23:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:20,315 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 23:23:20,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:23:20,316 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 23:23:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:23:20,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:20,317 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:20,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:20,531 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -395814058, now seen corresponding path program 2 times [2020-07-21 23:23:20,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:20,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496864985] [2020-07-21 23:23:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:20,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:20,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:23:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:20,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496864985] [2020-07-21 23:23:20,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:20,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 23:23:20,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268904676] [2020-07-21 23:23:20,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:23:20,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:23:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:23:20,779 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 12 states. [2020-07-21 23:23:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:20,964 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-07-21 23:23:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:23:20,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-21 23:23:20,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:20,965 INFO L225 Difference]: With dead ends: 31 [2020-07-21 23:23:20,966 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 23:23:20,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-07-21 23:23:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 23:23:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 23:23:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 23:23:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-07-21 23:23:20,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-07-21 23:23:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:20,973 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-07-21 23:23:20,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:23:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-07-21 23:23:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 23:23:20,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:20,974 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:21,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,189 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash -751554218, now seen corresponding path program 3 times [2020-07-21 23:23:21,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:21,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558712285] [2020-07-21 23:23:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,217 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:21,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:23:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 23:23:21,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-21 23:23:21,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558712285] [2020-07-21 23:23:21,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:21,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:23:21,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917674337] [2020-07-21 23:23:21,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:23:21,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:23:21,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:23:21,265 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-07-21 23:23:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:21,301 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-07-21 23:23:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:23:21,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-21 23:23:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:21,302 INFO L225 Difference]: With dead ends: 39 [2020-07-21 23:23:21,302 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 23:23:21,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:23:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 23:23:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 23:23:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 23:23:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 23:23:21,310 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2020-07-21 23:23:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:21,311 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 23:23:21,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:23:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 23:23:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 23:23:21,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:21,312 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:21,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,528 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 4 times [2020-07-21 23:23:21,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:21,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814354000] [2020-07-21 23:23:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:21,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:21,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:23:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:21,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814354000] [2020-07-21 23:23:21,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:21,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 23:23:21,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639156979] [2020-07-21 23:23:21,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 23:23:21,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:21,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 23:23:21,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-07-21 23:23:21,910 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 20 states. [2020-07-21 23:23:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:22,464 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 23:23:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 23:23:22,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-21 23:23:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:22,467 INFO L225 Difference]: With dead ends: 62 [2020-07-21 23:23:22,467 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 23:23:22,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=685, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 23:23:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 23:23:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 23:23:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 23:23:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 23:23:22,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2020-07-21 23:23:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:22,479 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 23:23:22,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 23:23:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 23:23:22,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 23:23:22,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:22,481 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:22,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:22,695 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 5 times [2020-07-21 23:23:22,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:22,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683665263] [2020-07-21 23:23:22,697 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 [2020-07-21 23:23:22,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:23:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 23:23:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:23,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:23,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683665263] [2020-07-21 23:23:23,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:23,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 23:23:23,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007313192] [2020-07-21 23:23:23,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 23:23:23,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 23:23:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 23:23:23,786 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 36 states. [2020-07-21 23:23:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:25,659 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-07-21 23:23:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 23:23:25,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-07-21 23:23:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:25,664 INFO L225 Difference]: With dead ends: 78 [2020-07-21 23:23:25,664 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 23:23:25,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1637, Invalid=2653, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 23:23:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 23:23:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 23:23:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 23:23:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-21 23:23:25,684 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-07-21 23:23:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:25,685 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-21 23:23:25,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 23:23:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-21 23:23:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 23:23:25,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:25,689 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:25,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:25,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1471630604, now seen corresponding path program 6 times [2020-07-21 23:23:25,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:25,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857524363] [2020-07-21 23:23:25,906 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 [2020-07-21 23:23:25,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 23:23:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:26,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 100 proven. 496 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:29,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857524363] [2020-07-21 23:23:29,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:29,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 23:23:29,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101182664] [2020-07-21 23:23:29,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 23:23:29,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 23:23:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3332, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 23:23:29,241 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 68 states. [2020-07-21 23:23:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:37,382 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-21 23:23:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-21 23:23:37,383 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 57 [2020-07-21 23:23:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:37,385 INFO L225 Difference]: With dead ends: 110 [2020-07-21 23:23:37,385 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 23:23:37,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=6341, Invalid=10429, Unknown=0, NotChecked=0, Total=16770 [2020-07-21 23:23:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 23:23:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-21 23:23:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 23:23:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-07-21 23:23:37,405 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 57 [2020-07-21 23:23:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:37,406 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-07-21 23:23:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 23:23:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-07-21 23:23:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-21 23:23:37,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:37,408 INFO L422 BasicCegarLoop]: trace histogram [63, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:37,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:37,618 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash -374211316, now seen corresponding path program 7 times [2020-07-21 23:23:37,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:37,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931407987] [2020-07-21 23:23:37,620 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 [2020-07-21 23:23:37,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:37,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 23:23:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:41,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 196 proven. 2016 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 23:23:50,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931407987] [2020-07-21 23:23:50,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:50,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 23:23:50,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880855433] [2020-07-21 23:23:50,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 23:23:50,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 23:23:50,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4404, Invalid=12888, Unknown=0, NotChecked=0, Total=17292 [2020-07-21 23:23:50,788 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 132 states. [2020-07-21 23:23:51,036 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 10 [2020-07-21 23:23:51,304 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 12 [2020-07-21 23:23:51,513 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 23:23:51,721 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 13 [2020-07-21 23:23:51,954 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 13 [2020-07-21 23:23:52,190 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 13 [2020-07-21 23:23:52,434 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 13 [2020-07-21 23:23:52,649 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 13 [2020-07-21 23:23:52,874 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 13 [2020-07-21 23:23:53,093 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 13 [2020-07-21 23:23:53,331 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 13 [2020-07-21 23:23:53,570 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 13 [2020-07-21 23:23:53,817 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 13 [2020-07-21 23:23:54,069 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 13 [2020-07-21 23:23:54,310 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 13 [2020-07-21 23:23:54,541 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 13 [2020-07-21 23:23:54,800 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 13 [2020-07-21 23:23:55,029 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 23:23:55,260 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 13 [2020-07-21 23:23:55,495 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 13 [2020-07-21 23:23:55,744 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 13 [2020-07-21 23:23:55,985 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 13 [2020-07-21 23:23:56,221 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 13 [2020-07-21 23:23:56,470 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 13 [2020-07-21 23:24:05,588 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 16 [2020-07-21 23:24:06,218 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-07-21 23:24:06,837 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 9 [2020-07-21 23:24:07,478 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 9 [2020-07-21 23:24:08,104 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-07-21 23:24:08,712 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 9 [2020-07-21 23:24:09,346 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 9 [2020-07-21 23:24:09,992 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-07-21 23:24:10,584 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-07-21 23:24:11,236 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 9 [2020-07-21 23:24:11,857 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-07-21 23:24:12,478 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 9 [2020-07-21 23:24:13,075 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 9 [2020-07-21 23:24:13,666 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-07-21 23:24:14,257 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 9 [2020-07-21 23:24:14,881 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 9 [2020-07-21 23:24:15,474 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-07-21 23:24:16,067 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 9 [2020-07-21 23:24:16,654 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 9 [2020-07-21 23:24:17,234 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-07-21 23:24:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:34,936 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2020-07-21 23:24:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-21 23:24:34,938 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 89 [2020-07-21 23:24:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:34,940 INFO L225 Difference]: With dead ends: 167 [2020-07-21 23:24:34,941 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 23:24:34,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11163 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=23060, Invalid=39690, Unknown=0, NotChecked=0, Total=62750 [2020-07-21 23:24:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 23:24:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 23:24:34,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 23:24:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-07-21 23:24:34,966 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 89 [2020-07-21 23:24:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:34,966 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-07-21 23:24:34,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-21 23:24:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-07-21 23:24:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-21 23:24:34,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:34,969 INFO L422 BasicCegarLoop]: trace histogram [120, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:35,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:35,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:35,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1451426972, now seen corresponding path program 8 times [2020-07-21 23:24:35,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:35,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797450634] [2020-07-21 23:24:35,185 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 [2020-07-21 23:24:35,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:24:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:24:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:35,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:24:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7648 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:35,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797450634] [2020-07-21 23:24:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:24:35,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 23:24:35,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170825248] [2020-07-21 23:24:35,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:24:35,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:24:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:24:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:24:35,527 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-07-21 23:24:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:35,625 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2020-07-21 23:24:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:24:35,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-07-21 23:24:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:35,630 INFO L225 Difference]: With dead ends: 176 [2020-07-21 23:24:35,630 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 23:24:35,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:24:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 23:24:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-21 23:24:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 23:24:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-07-21 23:24:35,650 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 146 [2020-07-21 23:24:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:35,651 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-07-21 23:24:35,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:24:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-07-21 23:24:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-21 23:24:35,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:35,654 INFO L422 BasicCegarLoop]: trace histogram [120, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:35,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:35,866 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash -699301936, now seen corresponding path program 9 times [2020-07-21 23:24:35,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:35,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684419524] [2020-07-21 23:24:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 23:24:35,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 23:24:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:24:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:36,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:24:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8530 backedges. 0 proven. 1270 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:36,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684419524] [2020-07-21 23:24:36,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:24:36,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 23:24:36,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925713062] [2020-07-21 23:24:36,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 23:24:36,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:24:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 23:24:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 23:24:36,645 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2020-07-21 23:24:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:36,840 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2020-07-21 23:24:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 23:24:36,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-07-21 23:24:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:36,845 INFO L225 Difference]: With dead ends: 224 [2020-07-21 23:24:36,845 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 23:24:36,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 23:24:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 23:24:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-07-21 23:24:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 23:24:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-07-21 23:24:36,867 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 170 [2020-07-21 23:24:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:36,868 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-07-21 23:24:36,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 23:24:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-07-21 23:24:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 23:24:36,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:36,877 INFO L422 BasicCegarLoop]: trace histogram [120, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:37,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:37,091 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:37,092 INFO L82 PathProgramCache]: Analyzing trace with hash -377226072, now seen corresponding path program 10 times [2020-07-21 23:24:37,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:37,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306415110] [2020-07-21 23:24:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:37,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:37,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 23:24:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:24:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:37,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:24:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10726 backedges. 0 proven. 3466 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:39,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306415110] [2020-07-21 23:24:39,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:24:39,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 23:24:39,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929415795] [2020-07-21 23:24:39,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 23:24:39,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:24:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 23:24:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 23:24:39,586 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 48 states. [2020-07-21 23:24:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:40,030 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2020-07-21 23:24:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 23:24:40,032 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 218 [2020-07-21 23:24:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:40,034 INFO L225 Difference]: With dead ends: 320 [2020-07-21 23:24:40,035 INFO L226 Difference]: Without dead ends: 315 [2020-07-21 23:24:40,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 23:24:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-21 23:24:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-07-21 23:24:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-21 23:24:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-07-21 23:24:40,058 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 218 [2020-07-21 23:24:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:40,059 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-07-21 23:24:40,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 23:24:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-07-21 23:24:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-21 23:24:40,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:40,065 INFO L422 BasicCegarLoop]: trace histogram [120, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:40,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:40,280 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1906391464, now seen corresponding path program 11 times [2020-07-21 23:24:40,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:40,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424604871] [2020-07-21 23:24:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:40,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:40,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:40,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 23:24:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:24:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:42,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:24:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16846 backedges. 0 proven. 9586 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:24:49,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424604871] [2020-07-21 23:24:49,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:24:49,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 23:24:49,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116161791] [2020-07-21 23:24:49,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 23:24:49,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:24:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 23:24:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 23:24:49,209 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 96 states. [2020-07-21 23:24:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:24:50,636 INFO L93 Difference]: Finished difference Result 512 states and 747 transitions. [2020-07-21 23:24:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 23:24:50,638 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 314 [2020-07-21 23:24:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:24:50,642 INFO L225 Difference]: With dead ends: 512 [2020-07-21 23:24:50,642 INFO L226 Difference]: Without dead ends: 507 [2020-07-21 23:24:50,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 23:24:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-21 23:24:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2020-07-21 23:24:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-07-21 23:24:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 695 transitions. [2020-07-21 23:24:50,665 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 695 transitions. Word has length 314 [2020-07-21 23:24:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:24:50,666 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 695 transitions. [2020-07-21 23:24:50,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 23:24:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 695 transitions. [2020-07-21 23:24:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 23:24:50,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:24:50,677 INFO L422 BasicCegarLoop]: trace histogram [120, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:24:50,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:50,892 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:24:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:24:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1953208760, now seen corresponding path program 12 times [2020-07-21 23:24:50,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:24:50,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282710402] [2020-07-21 23:24:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:24:51,055 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:24:51,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:24:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 23:24:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:25:00,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:25:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 35998 backedges. 0 proven. 28738 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2020-07-21 23:25:12,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282710402] [2020-07-21 23:25:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:25:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 103 [2020-07-21 23:25:12,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790449718] [2020-07-21 23:25:12,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 23:25:12,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 23:25:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 23:25:12,037 INFO L87 Difference]: Start difference. First operand 507 states and 695 transitions. Second operand 103 states. [2020-07-21 23:25:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:13,670 INFO L93 Difference]: Finished difference Result 540 states and 748 transitions. [2020-07-21 23:25:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 23:25:13,672 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 506 [2020-07-21 23:25:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:13,676 INFO L225 Difference]: With dead ends: 540 [2020-07-21 23:25:13,676 INFO L226 Difference]: Without dead ends: 535 [2020-07-21 23:25:13,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 821 SyntacticMatches, 89 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 23:25:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-07-21 23:25:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-07-21 23:25:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-21 23:25:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2020-07-21 23:25:13,700 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 506 [2020-07-21 23:25:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:13,701 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2020-07-21 23:25:13,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 23:25:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2020-07-21 23:25:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-21 23:25:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:25:13,705 INFO L422 BasicCegarLoop]: trace histogram [120, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:25:13,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:13,906 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:25:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:25:13,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1254004406, now seen corresponding path program 13 times [2020-07-21 23:25:13,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:25:13,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964484327] [2020-07-21 23:25:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:14,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:25:14,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:25:14,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:25:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:25:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39561 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 39360 trivial. 0 not checked. [2020-07-21 23:25:14,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:25:14,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964484327] [2020-07-21 23:25:14,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:25:14,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:25:14,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106611328] [2020-07-21 23:25:14,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:25:14,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:25:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:25:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:25:14,238 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand 5 states. [2020-07-21 23:25:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:25:14,286 INFO L93 Difference]: Finished difference Result 940 states and 1344 transitions. [2020-07-21 23:25:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:25:14,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 534 [2020-07-21 23:25:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:25:14,288 INFO L225 Difference]: With dead ends: 940 [2020-07-21 23:25:14,288 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:25:14,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:25:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:25:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:25:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:25:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:25:14,292 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 534 [2020-07-21 23:25:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:25:14,293 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:25:14,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:25:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:25:14,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:25:14,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:25:14,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:25:14,702 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 3 [2020-07-21 23:25:14,919 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 7 [2020-07-21 23:25:15,079 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:25:15,079 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:25:15,080 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:25:15,080 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:25:15,081 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-21 23:25:15,081 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-21 23:25:15,081 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-21 23:25:15,081 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 23:25:15,081 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 23:25:15,081 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) (* 62 main_~i~0))) (= 4 main_~k~0)) [2020-07-21 23:25:15,082 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-21 23:25:15,082 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-21 23:25:15,082 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 23:25:15,082 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 23:25:15,082 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:25:15,082 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 23:25:15,082 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:25:15,083 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:25:15,083 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 23:25:15,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:25:15 BoogieIcfgContainer [2020-07-21 23:25:15,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:25:15,105 INFO L168 Benchmark]: Toolchain (without parser) took 116913.08 ms. Allocated memory was 141.0 MB in the beginning and 505.9 MB in the end (delta: 364.9 MB). Free memory was 106.0 MB in the beginning and 301.9 MB in the end (delta: -195.9 MB). Peak memory consumption was 169.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,105 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.00 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 96.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,107 INFO L168 Benchmark]: Boogie Preprocessor took 120.97 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 182.1 MB in the end (delta: -85.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,107 INFO L168 Benchmark]: RCFGBuilder took 316.66 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 169.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,108 INFO L168 Benchmark]: TraceAbstraction took 116208.22 ms. Allocated memory was 202.9 MB in the beginning and 505.9 MB in the end (delta: 303.0 MB). Free memory was 169.0 MB in the beginning and 301.9 MB in the end (delta: -132.9 MB). Peak memory consumption was 170.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:25:15,111 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.00 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 96.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.97 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 182.1 MB in the end (delta: -85.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.66 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 169.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 116208.22 ms. Allocated memory was 202.9 MB in the beginning and 505.9 MB in the end (delta: 303.0 MB). Free memory was 169.0 MB in the beginning and 301.9 MB in the end (delta: -132.9 MB). Peak memory consumption was 170.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 62 * i) || 4 == k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 115.4s, OverallIterations: 16, TraceHistogramMax: 120, AutomataDifference: 59.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 2098 SDslu, 2884 SDs, 0 SdLazy, 1273 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4039 GetRequests, 3171 SyntacticMatches, 89 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 103.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=535occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 25 PreInvPairs, 450 NumberOfFragments, 33 HoareAnnotationTreeSize, 25 FomulaSimplifications, 5777 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 2195 NumberOfCodeBlocks, 2118 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3794 ConstructedInterpolants, 0 QuantifiedInterpolants, 3109882 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4894 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 113142/205374 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...