/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 14:14:58,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:14:58,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:14:58,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:14:58,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:14:58,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:14:58,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:14:58,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:14:58,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:14:58,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:14:58,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:14:58,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:14:58,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:14:58,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:14:58,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:14:58,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:14:58,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:14:58,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:14:58,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:14:58,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:14:58,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:14:58,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:14:58,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:14:58,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:14:58,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:14:59,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:14:59,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:14:59,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:14:59,008 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 14:14:59,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:14:59,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:14:59,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:14:59,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:14:59,025 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:14:59,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:14:59,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:14:59,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:14:59,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:14:59,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:14:59,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:14:59,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:14:59,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:14:59,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:14:59,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:14:59,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:14:59,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:14:59,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:14:59,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:14:59,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:14:59,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:14:59,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:14:59,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:14:59,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:14:59,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:14:59,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:14:59,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:14:59,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:14:59,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:14:59,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 2 [2020-07-21 14:14:59,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:14:59,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:14:59,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:14:59,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:14:59,318 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:14:59,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 14:14:59,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38ef0673/d67be8404ea54421910beb3ecf17f0d4/FLAG09fc9c044 [2020-07-21 14:14:59,889 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:14:59,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 14:14:59,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38ef0673/d67be8404ea54421910beb3ecf17f0d4/FLAG09fc9c044 [2020-07-21 14:15:00,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38ef0673/d67be8404ea54421910beb3ecf17f0d4 [2020-07-21 14:15:00,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:15:00,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:15:00,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:15:00,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:15:00,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:15:00,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fc409a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00, skipping insertion in model container [2020-07-21 14:15:00,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:15:00,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:15:00,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:15:00,438 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:15:00,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:15:00,472 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:15:00,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00 WrapperNode [2020-07-21 14:15:00,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:15:00,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:15:00,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:15:00,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:15:00,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (1/1) ... [2020-07-21 14:15:00,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:15:00,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:15:00,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:15:00,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:15:00,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (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 14:15:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:15:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:15:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:15:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:15:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:15:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:15:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:15:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:15:00,842 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:15:00,843 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 14:15:00,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:15:00 BoogieIcfgContainer [2020-07-21 14:15:00,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:15:00,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:15:00,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:15:00,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:15:00,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:15:00" (1/3) ... [2020-07-21 14:15:00,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7fc950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:15:00, skipping insertion in model container [2020-07-21 14:15:00,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:00" (2/3) ... [2020-07-21 14:15:00,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7fc950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:15:00, skipping insertion in model container [2020-07-21 14:15:00,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:15:00" (3/3) ... [2020-07-21 14:15:00,856 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-21 14:15:00,867 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:15:00,875 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:15:00,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:15:00,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:15:00,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:15:00,922 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:15:00,922 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:15:00,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:15:00,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:15:00,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:15:00,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:15:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 14:15:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:15:00,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:00,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:00,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-21 14:15:00,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:00,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809158654] [2020-07-21 14:15:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:01,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:15:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 14:15:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:01,094 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 14:15:01,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:15:01,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809158654] [2020-07-21 14:15:01,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:15:01,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 14:15:01,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573325218] [2020-07-21 14:15:01,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 14:15:01,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 14:15:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:15:01,120 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 14:15:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:01,143 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-21 14:15:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 14:15:01,145 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 14:15:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:01,153 INFO L225 Difference]: With dead ends: 37 [2020-07-21 14:15:01,153 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 14:15:01,157 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 14:15:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 14:15:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 14:15:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 14:15:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-21 14:15:01,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-21 14:15:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:01,197 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-21 14:15:01,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 14:15:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-21 14:15:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:15:01,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:01,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:01,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:01,409 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:01,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-21 14:15:01,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:01,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665207008] [2020-07-21 14:15:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:01,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:15:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:01,470 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 14:15:01,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:15:01,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665207008] [2020-07-21 14:15:01,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:15:01,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:15:01,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623994755] [2020-07-21 14:15:01,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:15:01,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:15:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:15:01,476 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-21 14:15:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:01,507 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 14:15:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:15:01,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 14:15:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:01,510 INFO L225 Difference]: With dead ends: 20 [2020-07-21 14:15:01,510 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 14:15:01,511 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 14:15:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 14:15:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 14:15:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 14:15:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 14:15:01,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-21 14:15:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:01,521 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 14:15:01,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:15:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 14:15:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:15:01,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:01,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:01,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:01,724 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-21 14:15:01,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:01,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999052572] [2020-07-21 14:15:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:01,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:01,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:01,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:15:01,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:01,778 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 14:15:01,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:15:01,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999052572] [2020-07-21 14:15:01,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:15:01,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:15:01,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156558889] [2020-07-21 14:15:01,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:15:01,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:15:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:15:01,781 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 14:15:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:01,792 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-21 14:15:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:15:01,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 14:15:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:01,795 INFO L225 Difference]: With dead ends: 25 [2020-07-21 14:15:01,795 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 14:15:01,796 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 14:15:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 14:15:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 14:15:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 14:15:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 14:15:01,802 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-21 14:15:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:01,802 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 14:15:01,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:15:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 14:15:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 14:15:01,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:01,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:02,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:02,009 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-21 14:15:02,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:02,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447561290] [2020-07-21 14:15:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:02,040 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:02,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:15:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 14:15:02,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 14:15:02,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447561290] [2020-07-21 14:15:02,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:02,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 14:15:02,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410928838] [2020-07-21 14:15:02,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:15:02,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:15:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:15:02,105 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-07-21 14:15:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:02,149 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-07-21 14:15:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:15:02,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 14:15:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:02,151 INFO L225 Difference]: With dead ends: 33 [2020-07-21 14:15:02,151 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 14:15:02,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 14:15:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 14:15:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 14:15:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 14:15:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 14:15:02,160 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 14:15:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:02,160 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 14:15:02,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:15:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 14:15:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 14:15:02,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:02,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:02,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:02,363 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1954211852, now seen corresponding path program 2 times [2020-07-21 14:15:02,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:02,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265154760] [2020-07-21 14:15:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:02,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:02,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:15:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 14:15:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 14:15:02,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265154760] [2020-07-21 14:15:02,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:02,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 14:15:02,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488948512] [2020-07-21 14:15:02,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:15:02,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:02,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:15:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:15:02,517 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 14:15:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:02,566 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 14:15:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:15:02,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-21 14:15:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:02,567 INFO L225 Difference]: With dead ends: 50 [2020-07-21 14:15:02,568 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 14:15:02,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 14:15:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 14:15:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 14:15:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 14:15:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-07-21 14:15:02,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-07-21 14:15:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:02,577 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-07-21 14:15:02,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:15:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-07-21 14:15:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 14:15:02,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:02,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:02,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:02,793 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash -745377012, now seen corresponding path program 3 times [2020-07-21 14:15:02,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:02,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274173044] [2020-07-21 14:15:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:02,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:15:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 14:15:02,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 14:15:03,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274173044] [2020-07-21 14:15:03,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:03,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 14:15:03,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92388717] [2020-07-21 14:15:03,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:15:03,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:15:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:15:03,039 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 12 states. [2020-07-21 14:15:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:03,220 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-21 14:15:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 14:15:03,221 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-07-21 14:15:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:03,222 INFO L225 Difference]: With dead ends: 54 [2020-07-21 14:15:03,222 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 14:15:03,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 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 14:15:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 14:15:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 14:15:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 14:15:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 14:15:03,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 29 [2020-07-21 14:15:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:03,231 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 14:15:03,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:15:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 14:15:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 14:15:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:03,233 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:03,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:03,447 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 4 times [2020-07-21 14:15:03,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:03,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557912665] [2020-07-21 14:15:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:03,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:15:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:15:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:03,613 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 14:15:03,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:03,825 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 14:15:03,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557912665] [2020-07-21 14:15:03,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:03,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 14:15:03,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152016035] [2020-07-21 14:15:03,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 14:15:03,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 14:15:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-07-21 14:15:03,828 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 20 states. [2020-07-21 14:15:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:04,347 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 14:15:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 14:15:04,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-21 14:15:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:04,348 INFO L225 Difference]: With dead ends: 62 [2020-07-21 14:15:04,348 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 14:15:04,349 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 14:15:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 14:15:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 14:15:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 14:15:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 14:15:04,357 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2020-07-21 14:15:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:04,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 14:15:04,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 14:15:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 14:15:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 14:15:04,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:04,360 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:04,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:04,573 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 5 times [2020-07-21 14:15:04,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:04,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525594034] [2020-07-21 14:15:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:04,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:15:04,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 14:15:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:04,925 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 14:15:04,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:05,543 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 14:15:05,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525594034] [2020-07-21 14:15:05,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:05,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 14:15:05,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647532127] [2020-07-21 14:15:05,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 14:15:05,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 14:15:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 14:15:05,546 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 36 states. [2020-07-21 14:15:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:07,419 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-07-21 14:15:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 14:15:07,420 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-07-21 14:15:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:07,424 INFO L225 Difference]: With dead ends: 78 [2020-07-21 14:15:07,424 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 14:15:07,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1637, Invalid=2653, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 14:15:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 14:15:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 14:15:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 14:15:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-21 14:15:07,447 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-07-21 14:15:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:07,448 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-21 14:15:07,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 14:15:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-21 14:15:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 14:15:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:07,452 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:07,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:07,666 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1471630604, now seen corresponding path program 6 times [2020-07-21 14:15:07,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:07,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226021319] [2020-07-21 14:15:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:07,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:15:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 14:15:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:08,751 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 14:15:08,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:11,116 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 14:15:11,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226021319] [2020-07-21 14:15:11,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:11,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 14:15:11,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733450791] [2020-07-21 14:15:11,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 14:15:11,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 14:15:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3332, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 14:15:11,127 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 68 states. [2020-07-21 14:15:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:15:19,412 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-21 14:15:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-21 14:15:19,413 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 57 [2020-07-21 14:15:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:15:19,416 INFO L225 Difference]: With dead ends: 110 [2020-07-21 14:15:19,416 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 14:15:19,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=6341, Invalid=10429, Unknown=0, NotChecked=0, Total=16770 [2020-07-21 14:15:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 14:15:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-21 14:15:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 14:15:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-07-21 14:15:19,450 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 57 [2020-07-21 14:15:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:15:19,451 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-07-21 14:15:19,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 14:15:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-07-21 14:15:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-21 14:15:19,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:15:19,457 INFO L422 BasicCegarLoop]: trace histogram [63, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:15:19,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:19,672 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:15:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:15:19,673 INFO L82 PathProgramCache]: Analyzing trace with hash -374211316, now seen corresponding path program 7 times [2020-07-21 14:15:19,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:15:19,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700115522] [2020-07-21 14:15:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:15:19,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:15:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:15:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 14:15:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:15:23,403 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 14:15:23,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:15:32,908 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 14:15:32,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700115522] [2020-07-21 14:15:32,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:15:32,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 14:15:32,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717478741] [2020-07-21 14:15:32,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 14:15:32,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:15:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 14:15:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4404, Invalid=12888, Unknown=0, NotChecked=0, Total=17292 [2020-07-21 14:15:32,916 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 132 states. [2020-07-21 14:15:33,153 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 10 [2020-07-21 14:15:33,405 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 12 [2020-07-21 14:15:33,623 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 14:15:33,858 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 13 [2020-07-21 14:15:34,079 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 13 [2020-07-21 14:15:34,324 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 13 [2020-07-21 14:15:34,545 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 13 [2020-07-21 14:15:34,766 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 13 [2020-07-21 14:15:34,996 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 13 [2020-07-21 14:15:35,227 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 13 [2020-07-21 14:15:35,458 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 13 [2020-07-21 14:15:35,697 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 13 [2020-07-21 14:15:35,952 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 13 [2020-07-21 14:15:36,185 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 13 [2020-07-21 14:15:36,417 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 13 [2020-07-21 14:15:36,657 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 13 [2020-07-21 14:15:36,891 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 13 [2020-07-21 14:15:37,138 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 14:15:37,388 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 13 [2020-07-21 14:15:37,621 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 13 [2020-07-21 14:15:37,862 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 13 [2020-07-21 14:15:38,139 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 13 [2020-07-21 14:15:38,380 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 13 [2020-07-21 14:15:38,633 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 13 [2020-07-21 14:15:38,885 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 13 [2020-07-21 14:15:39,386 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 13 [2020-07-21 14:15:47,917 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 16 [2020-07-21 14:15:48,550 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-07-21 14:15:49,172 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 9 [2020-07-21 14:15:49,822 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 9 [2020-07-21 14:15:50,474 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-07-21 14:15:51,100 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 9 [2020-07-21 14:15:51,727 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 9 [2020-07-21 14:15:52,355 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-07-21 14:15:53,011 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-07-21 14:15:53,653 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 9 [2020-07-21 14:15:54,300 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-07-21 14:15:54,939 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 9 [2020-07-21 14:15:55,586 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 9 [2020-07-21 14:15:56,200 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-07-21 14:15:56,861 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 9 [2020-07-21 14:15:57,497 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 9 [2020-07-21 14:15:58,150 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-07-21 14:15:58,757 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 9 [2020-07-21 14:15:59,348 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 9 [2020-07-21 14:16:01,129 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 9 [2020-07-21 14:16:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:18,026 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2020-07-21 14:16:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-21 14:16:18,029 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 89 [2020-07-21 14:16:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:18,031 INFO L225 Difference]: With dead ends: 167 [2020-07-21 14:16:18,031 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 14:16:18,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11163 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=23060, Invalid=39690, Unknown=0, NotChecked=0, Total=62750 [2020-07-21 14:16:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 14:16:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 14:16:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 14:16:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-07-21 14:16:18,055 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 89 [2020-07-21 14:16:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:18,056 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-07-21 14:16:18,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-21 14:16:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-07-21 14:16:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-21 14:16:18,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:18,058 INFO L422 BasicCegarLoop]: trace histogram [120, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:18,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:18,268 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1451426972, now seen corresponding path program 8 times [2020-07-21 14:16:18,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:18,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608529524] [2020-07-21 14:16:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:18,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:16:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:18,452 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 14:16:18,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:18,588 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 14:16:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608529524] [2020-07-21 14:16:18,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:18,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 14:16:18,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073684662] [2020-07-21 14:16:18,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:16:18,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:16:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:16:18,591 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-07-21 14:16:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:18,696 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2020-07-21 14:16:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:16:18,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-07-21 14:16:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:18,701 INFO L225 Difference]: With dead ends: 176 [2020-07-21 14:16:18,701 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 14:16:18,702 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 14:16:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 14:16:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-21 14:16:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 14:16:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-07-21 14:16:18,719 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 146 [2020-07-21 14:16:18,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:18,719 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-07-21 14:16:18,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:16:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-07-21 14:16:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-21 14:16:18,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:18,722 INFO L422 BasicCegarLoop]: trace histogram [120, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:18,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:18,933 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -699301936, now seen corresponding path program 9 times [2020-07-21 14:16:18,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:18,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309668106] [2020-07-21 14:16:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:19,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:19,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:19,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 14:16:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:19,299 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 14:16:19,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:19,781 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 14:16:19,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309668106] [2020-07-21 14:16:19,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:19,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 14:16:19,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443392218] [2020-07-21 14:16:19,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 14:16:19,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 14:16:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 14:16:19,784 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2020-07-21 14:16:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:19,960 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2020-07-21 14:16:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 14:16:19,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-07-21 14:16:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:19,964 INFO L225 Difference]: With dead ends: 224 [2020-07-21 14:16:19,964 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 14:16:19,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 14:16:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 14:16:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-07-21 14:16:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 14:16:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-07-21 14:16:19,986 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 170 [2020-07-21 14:16:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:19,987 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-07-21 14:16:19,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 14:16:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-07-21 14:16:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 14:16:19,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:19,990 INFO L422 BasicCegarLoop]: trace histogram [120, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:20,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:20,203 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash -377226072, now seen corresponding path program 10 times [2020-07-21 14:16:20,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:20,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548438667] [2020-07-21 14:16:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:20,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 14:16:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:20,979 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 14:16:20,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:22,654 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 14:16:22,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548438667] [2020-07-21 14:16:22,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:22,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 14:16:22,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340772065] [2020-07-21 14:16:22,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 14:16:22,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 14:16:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 14:16:22,657 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 48 states. [2020-07-21 14:16:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:23,088 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2020-07-21 14:16:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 14:16:23,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 218 [2020-07-21 14:16:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:23,091 INFO L225 Difference]: With dead ends: 320 [2020-07-21 14:16:23,091 INFO L226 Difference]: Without dead ends: 315 [2020-07-21 14:16:23,092 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 14:16:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-21 14:16:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-07-21 14:16:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-21 14:16:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-07-21 14:16:23,108 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 218 [2020-07-21 14:16:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:23,108 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-07-21 14:16:23,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 14:16:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-07-21 14:16:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-21 14:16:23,113 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:23,113 INFO L422 BasicCegarLoop]: trace histogram [120, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:23,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:23,329 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1906391464, now seen corresponding path program 11 times [2020-07-21 14:16:23,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:23,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509904921] [2020-07-21 14:16:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:23,443 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:23,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 14:16:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:25,825 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 14:16:25,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:32,697 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 14:16:32,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509904921] [2020-07-21 14:16:32,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:32,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 14:16:32,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951362771] [2020-07-21 14:16:32,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 14:16:32,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 14:16:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 14:16:32,701 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 96 states. [2020-07-21 14:16:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:33,979 INFO L93 Difference]: Finished difference Result 512 states and 747 transitions. [2020-07-21 14:16:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 14:16:33,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 314 [2020-07-21 14:16:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:33,984 INFO L225 Difference]: With dead ends: 512 [2020-07-21 14:16:33,984 INFO L226 Difference]: Without dead ends: 507 [2020-07-21 14:16:33,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 14:16:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-21 14:16:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2020-07-21 14:16:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-07-21 14:16:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 695 transitions. [2020-07-21 14:16:34,005 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 695 transitions. Word has length 314 [2020-07-21 14:16:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:34,006 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 695 transitions. [2020-07-21 14:16:34,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 14:16:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 695 transitions. [2020-07-21 14:16:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 14:16:34,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:34,010 INFO L422 BasicCegarLoop]: trace histogram [120, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:34,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:34,223 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:34,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1953208760, now seen corresponding path program 12 times [2020-07-21 14:16:34,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:34,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107300978] [2020-07-21 14:16:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:34,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 14:16:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:44,343 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 14:16:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:55,560 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 14:16:55,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107300978] [2020-07-21 14:16:55,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:55,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 103 [2020-07-21 14:16:55,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958035376] [2020-07-21 14:16:55,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 14:16:55,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 14:16:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 14:16:55,565 INFO L87 Difference]: Start difference. First operand 507 states and 695 transitions. Second operand 103 states. [2020-07-21 14:16:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:56,913 INFO L93 Difference]: Finished difference Result 540 states and 748 transitions. [2020-07-21 14:16:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 14:16:56,915 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 506 [2020-07-21 14:16:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:56,918 INFO L225 Difference]: With dead ends: 540 [2020-07-21 14:16:56,919 INFO L226 Difference]: Without dead ends: 535 [2020-07-21 14:16:56,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 821 SyntacticMatches, 89 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 14:16:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-07-21 14:16:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-07-21 14:16:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-21 14:16:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2020-07-21 14:16:56,940 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 506 [2020-07-21 14:16:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:56,941 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2020-07-21 14:16:56,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 14:16:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2020-07-21 14:16:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-21 14:16:56,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:56,945 INFO L422 BasicCegarLoop]: trace histogram [120, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:57,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:57,151 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1254004406, now seen corresponding path program 13 times [2020-07-21 14:16:57,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:57,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231329900] [2020-07-21 14:16:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:57,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:16:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:57,460 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 14:16:57,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:16:57,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231329900] [2020-07-21 14:16:57,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:16:57,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:16:57,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657848730] [2020-07-21 14:16:57,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:16:57,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:16:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:16:57,462 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand 5 states. [2020-07-21 14:16:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:57,513 INFO L93 Difference]: Finished difference Result 940 states and 1344 transitions. [2020-07-21 14:16:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:16:57,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 534 [2020-07-21 14:16:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:57,514 INFO L225 Difference]: With dead ends: 940 [2020-07-21 14:16:57,515 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:16:57,518 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 14:16:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:16:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:16:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:16:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:16:57,519 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 534 [2020-07-21 14:16:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:57,520 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:16:57,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:16:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:16:57,520 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:16:57,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:57,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:16:57,922 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 3 [2020-07-21 14:16:58,110 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 7 [2020-07-21 14:16:58,274 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 14:16:58,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:16:58,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:16:58,274 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:16:58,274 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:16:58,274 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:16:58,274 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-21 14:16:58,275 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 14:16:58,275 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 14:16:58,276 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 14:16:58,276 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 14:16:58,276 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-21 14:16:58,276 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 14:16:58,276 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 14:16:58,276 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:16:58,276 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 14:16:58,277 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 14:16:58,277 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:16:58,277 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 14:16:58,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:16:58 BoogieIcfgContainer [2020-07-21 14:16:58,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:16:58,297 INFO L168 Benchmark]: Toolchain (without parser) took 118066.21 ms. Allocated memory was 144.2 MB in the beginning and 505.4 MB in the end (delta: 361.2 MB). Free memory was 102.1 MB in the beginning and 283.2 MB in the end (delta: -181.1 MB). Peak memory consumption was 180.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,297 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.98 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,298 INFO L168 Benchmark]: Boogie Preprocessor took 35.03 ms. Allocated memory is still 144.2 MB. Free memory was 92.4 MB in the beginning and 90.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,299 INFO L168 Benchmark]: RCFGBuilder took 337.55 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.9 MB in the beginning and 168.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,299 INFO L168 Benchmark]: TraceAbstraction took 117446.98 ms. Allocated memory was 201.3 MB in the beginning and 505.4 MB in the end (delta: 304.1 MB). Free memory was 168.0 MB in the beginning and 283.2 MB in the end (delta: -115.3 MB). Peak memory consumption was 188.8 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:58,302 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.98 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.03 ms. Allocated memory is still 144.2 MB. Free memory was 92.4 MB in the beginning and 90.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.55 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.9 MB in the beginning and 168.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 117446.98 ms. Allocated memory was 201.3 MB in the beginning and 505.4 MB in the end (delta: 304.1 MB). Free memory was 168.0 MB in the beginning and 283.2 MB in the end (delta: -115.3 MB). Peak memory consumption was 188.8 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: 116.8s, OverallIterations: 16, TraceHistogramMax: 120, AutomataDifference: 59.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 2303 SDslu, 2810 SDs, 0 SdLazy, 1254 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4075 GetRequests, 3207 SyntacticMatches, 89 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 105.1s 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, 52.2s InterpolantComputationTime, 2213 NumberOfCodeBlocks, 2151 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 3830 ConstructedInterpolants, 0 QuantifiedInterpolants, 3112042 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4954 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 113220/205452 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...