/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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 20:34:23,595 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 20:34:23,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:34:23,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:34:23,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:34:23,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:34:23,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:34:23,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:34:23,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:34:23,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:34:23,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:34:23,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:34:23,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:34:23,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:34:23,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:34:23,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:34:23,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:34:23,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:34:23,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:34:23,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:34:23,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:34:23,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:34:23,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:34:23,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:34:23,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:34:23,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:34:23,667 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 20:34:23,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:34:23,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:34:23,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:34:23,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:34:23,686 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:34:23,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:34:23,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:34:23,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:34:23,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:34:23,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:34:23,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:34:23,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:34:23,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:34:23,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:34:23,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:34:23,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:34:23,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:34:23,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:34:23,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:34:23,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:34:23,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:34:23,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:23,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:34:23,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:34:23,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:34:24,038 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:34:24,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:34:24,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:34:24,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:34:24,062 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:34:24,063 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 20:34:24,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfb610367/36e5077bb6a54cd59e862a381633ece6/FLAGd7bd430de [2020-07-21 20:34:24,726 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:34:24,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-21 20:34:24,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfb610367/36e5077bb6a54cd59e862a381633ece6/FLAGd7bd430de [2020-07-21 20:34:25,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfb610367/36e5077bb6a54cd59e862a381633ece6 [2020-07-21 20:34:25,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:34:25,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:34:25,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:34:25,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:34:25,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:34:25,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57288dd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25, skipping insertion in model container [2020-07-21 20:34:25,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:34:25,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:34:25,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:34:25,445 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:34:25,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:34:25,482 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:34:25,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25 WrapperNode [2020-07-21 20:34:25,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:34:25,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:34:25,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:34:25,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:34:25,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (1/1) ... [2020-07-21 20:34:25,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:34:25,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:34:25,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:34:25,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:34:25,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (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 20:34:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:34:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:34:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:34:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:34:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:34:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:34:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:34:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:34:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:34:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:34:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:34:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:34:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:34:25,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:34:25,924 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:34:25,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:25 BoogieIcfgContainer [2020-07-21 20:34:25,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:34:25,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:34:25,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:34:25,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:34:25,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:34:25" (1/3) ... [2020-07-21 20:34:25,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:25, skipping insertion in model container [2020-07-21 20:34:25,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:25" (2/3) ... [2020-07-21 20:34:25,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4141370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:25, skipping insertion in model container [2020-07-21 20:34:25,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:25" (3/3) ... [2020-07-21 20:34:25,941 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-21 20:34:25,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:34:25,963 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:34:25,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:34:26,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:34:26,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:34:26,011 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:34:26,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:34:26,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:34:26,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:34:26,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:34:26,013 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:34:26,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 20:34:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:34:26,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:26,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:26,044 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-21 20:34:26,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:26,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804618991] [2020-07-21 20:34:26,059 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 20:34:26,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:34:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:34:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:26,192 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 20:34:26,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:34:26,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804618991] [2020-07-21 20:34:26,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:34:26,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:34:26,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475333407] [2020-07-21 20:34:26,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:34:26,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:26,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:34:26,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:34:26,232 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 20:34:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:26,272 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-21 20:34:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:34:26,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 20:34:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:26,301 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:34:26,302 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 20:34:26,310 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 20:34:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 20:34:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 20:34:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 20:34:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-21 20:34:26,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-21 20:34:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:26,357 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-21 20:34:26,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:34:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-21 20:34:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:34:26,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:26,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:26,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:26,573 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-21 20:34:26,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:26,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938109169] [2020-07-21 20:34:26,575 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 20:34:26,605 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:34:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:26,653 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 20:34:26,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:34:26,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938109169] [2020-07-21 20:34:26,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:34:26,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:34:26,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580039455] [2020-07-21 20:34:26,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:34:26,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:34:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:34:26,658 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-21 20:34:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:26,680 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 20:34:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:34:26,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 20:34:26,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:26,682 INFO L225 Difference]: With dead ends: 20 [2020-07-21 20:34:26,682 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 20:34:26,684 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 20:34:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 20:34:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 20:34:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 20:34:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 20:34:26,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-21 20:34:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:26,691 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 20:34:26,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:34:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 20:34:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:34:26,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:26,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:26,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:26,899 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-21 20:34:26,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:26,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926350838] [2020-07-21 20:34:26,904 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 20:34:26,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:34:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:26,951 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 20:34:26,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:34:26,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926350838] [2020-07-21 20:34:26,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:34:26,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:34:26,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788758116] [2020-07-21 20:34:26,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:34:26,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:34:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:34:26,955 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 20:34:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:26,972 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-21 20:34:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:34:26,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 20:34:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:26,974 INFO L225 Difference]: With dead ends: 25 [2020-07-21 20:34:26,974 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 20:34:26,975 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 20:34:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 20:34:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 20:34:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 20:34:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 20:34:26,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-21 20:34:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:26,982 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 20:34:26,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:34:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 20:34:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:34:26,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:26,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:27,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:27,185 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-21 20:34:27,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:27,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075254964] [2020-07-21 20:34:27,187 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 20:34:27,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:27,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:34:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:27,257 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 20:34:27,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:27,301 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 20:34:27,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075254964] [2020-07-21 20:34:27,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:27,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:34:27,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484190948] [2020-07-21 20:34:27,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:34:27,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:27,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:34:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:34:27,305 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-07-21 20:34:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:27,356 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-07-21 20:34:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:34:27,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 20:34:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:27,359 INFO L225 Difference]: With dead ends: 33 [2020-07-21 20:34:27,359 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 20:34:27,360 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 20:34:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 20:34:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 20:34:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:34:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 20:34:27,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 20:34:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:27,370 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 20:34:27,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:34:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 20:34:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:34:27,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:27,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:27,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:27,586 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1954211852, now seen corresponding path program 2 times [2020-07-21 20:34:27,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:27,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523764743] [2020-07-21 20:34:27,588 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 20:34:27,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:27,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:34:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:27,699 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 20:34:27,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:27,752 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 20:34:27,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523764743] [2020-07-21 20:34:27,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:27,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 20:34:27,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693773856] [2020-07-21 20:34:27,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:34:27,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:34:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:34:27,756 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 20:34:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:27,812 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 20:34:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:34:27,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-21 20:34:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:27,814 INFO L225 Difference]: With dead ends: 50 [2020-07-21 20:34:27,814 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 20:34:27,815 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 20:34:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 20:34:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 20:34:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 20:34:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-07-21 20:34:27,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 27 [2020-07-21 20:34:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:27,825 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-07-21 20:34:27,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:34:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-07-21 20:34:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:34:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:27,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:28,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:28,042 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash -745377012, now seen corresponding path program 3 times [2020-07-21 20:34:28,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:28,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380135947] [2020-07-21 20:34:28,045 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 20:34:28,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:28,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:28,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:34:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:28,221 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 20:34:28,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:28,345 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 20:34:28,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380135947] [2020-07-21 20:34:28,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:28,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 20:34:28,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725174304] [2020-07-21 20:34:28,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:34:28,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:28,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:34:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:34:28,349 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 12 states. [2020-07-21 20:34:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:28,569 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-21 20:34:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:34:28,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-07-21 20:34:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:28,571 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:34:28,572 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 20:34:28,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-07-21 20:34:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 20:34:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 20:34:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 20:34:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 20:34:28,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 29 [2020-07-21 20:34:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:28,582 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 20:34:28,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:34:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 20:34:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:34:28,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:28,584 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:28,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:28,799 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1833781516, now seen corresponding path program 4 times [2020-07-21 20:34:28,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:28,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79493155] [2020-07-21 20:34:28,801 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 20:34:28,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:34:28,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:34:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:28,993 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 20:34:28,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:29,242 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 20:34:29,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79493155] [2020-07-21 20:34:29,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:29,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-21 20:34:29,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75710703] [2020-07-21 20:34:29,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 20:34:29,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 20:34:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-07-21 20:34:29,246 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 20 states. [2020-07-21 20:34:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:29,920 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 20:34:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 20:34:29,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-21 20:34:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:29,922 INFO L225 Difference]: With dead ends: 62 [2020-07-21 20:34:29,922 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 20:34:29,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=685, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 20:34:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 20:34:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-21 20:34:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 20:34:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 20:34:29,933 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 33 [2020-07-21 20:34:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:29,933 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 20:34:29,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 20:34:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 20:34:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 20:34:29,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:29,935 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:30,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:30,140 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 5 times [2020-07-21 20:34:30,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:30,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839831537] [2020-07-21 20:34:30,143 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 20:34:30,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:34:30,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 20:34:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:30,509 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 20:34:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:31,229 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 20:34:31,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839831537] [2020-07-21 20:34:31,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:31,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-07-21 20:34:31,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358027261] [2020-07-21 20:34:31,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 20:34:31,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 20:34:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 20:34:31,233 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 36 states. [2020-07-21 20:34:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:33,143 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2020-07-21 20:34:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 20:34:33,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-07-21 20:34:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:33,146 INFO L225 Difference]: With dead ends: 78 [2020-07-21 20:34:33,146 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 20:34:33,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1637, Invalid=2653, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 20:34:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 20:34:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-21 20:34:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 20:34:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-21 20:34:33,167 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-07-21 20:34:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:33,168 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-21 20:34:33,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 20:34:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-21 20:34:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 20:34:33,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:33,170 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:33,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:33,374 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1471630604, now seen corresponding path program 6 times [2020-07-21 20:34:33,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:33,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063921579] [2020-07-21 20:34:33,377 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 20:34:33,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:34:33,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 20:34:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:34,498 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 20:34:34,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:36,907 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 20:34:36,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063921579] [2020-07-21 20:34:36,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:36,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-07-21 20:34:36,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060224123] [2020-07-21 20:34:36,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-21 20:34:36,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-21 20:34:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3332, Unknown=0, NotChecked=0, Total=4556 [2020-07-21 20:34:36,920 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 68 states. [2020-07-21 20:34:40,075 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2020-07-21 20:34:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:34:45,465 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2020-07-21 20:34:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-21 20:34:45,467 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 57 [2020-07-21 20:34:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:34:45,468 INFO L225 Difference]: With dead ends: 110 [2020-07-21 20:34:45,469 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 20:34:45,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=6341, Invalid=10429, Unknown=0, NotChecked=0, Total=16770 [2020-07-21 20:34:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 20:34:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-21 20:34:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 20:34:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-07-21 20:34:45,533 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 57 [2020-07-21 20:34:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:34:45,535 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-07-21 20:34:45,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-21 20:34:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-07-21 20:34:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-21 20:34:45,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:34:45,539 INFO L422 BasicCegarLoop]: trace histogram [63, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:34:45,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:34:45,741 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:34:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:34:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash -374211316, now seen corresponding path program 7 times [2020-07-21 20:34:45,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:34:45,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992897970] [2020-07-21 20:34:45,743 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 20:34:45,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:34:45,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:34:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-21 20:34:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:34:49,559 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 20:34:49,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:34:59,244 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 20:34:59,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992897970] [2020-07-21 20:34:59,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:34:59,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2020-07-21 20:34:59,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487685010] [2020-07-21 20:34:59,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-21 20:34:59,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:34:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-21 20:34:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4404, Invalid=12888, Unknown=0, NotChecked=0, Total=17292 [2020-07-21 20:34:59,251 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 132 states. [2020-07-21 20:34:59,493 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 10 [2020-07-21 20:34:59,762 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 12 [2020-07-21 20:34:59,975 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2020-07-21 20:35:00,186 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 13 [2020-07-21 20:35:00,411 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 13 [2020-07-21 20:35:00,642 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 13 [2020-07-21 20:35:00,885 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 13 [2020-07-21 20:35:01,124 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 13 [2020-07-21 20:35:01,387 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 13 [2020-07-21 20:35:01,630 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 13 [2020-07-21 20:35:01,872 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 13 [2020-07-21 20:35:02,132 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 13 [2020-07-21 20:35:02,385 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 13 [2020-07-21 20:35:02,625 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 13 [2020-07-21 20:35:02,876 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 13 [2020-07-21 20:35:03,147 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 13 [2020-07-21 20:35:03,401 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 13 [2020-07-21 20:35:03,662 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 13 [2020-07-21 20:35:03,911 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 13 [2020-07-21 20:35:04,169 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 13 [2020-07-21 20:35:04,434 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 13 [2020-07-21 20:35:04,712 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 13 [2020-07-21 20:35:04,967 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 13 [2020-07-21 20:35:05,236 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 13 [2020-07-21 20:35:05,517 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 13 [2020-07-21 20:35:05,795 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 13 [2020-07-21 20:35:06,064 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 13 [2020-07-21 20:35:14,629 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 16 [2020-07-21 20:35:15,279 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-07-21 20:35:15,943 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 9 [2020-07-21 20:35:16,623 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 9 [2020-07-21 20:35:17,281 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-07-21 20:35:17,955 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 9 [2020-07-21 20:35:18,655 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 9 [2020-07-21 20:35:19,305 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-07-21 20:35:19,931 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-07-21 20:35:20,587 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 9 [2020-07-21 20:35:21,260 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-07-21 20:35:21,917 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 9 [2020-07-21 20:35:22,570 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 9 [2020-07-21 20:35:23,229 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-07-21 20:35:23,893 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 9 [2020-07-21 20:35:24,574 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 9 [2020-07-21 20:35:25,208 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-07-21 20:35:25,807 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 9 [2020-07-21 20:35:26,390 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 9 [2020-07-21 20:35:26,962 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-07-21 20:35:27,578 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 9 [2020-07-21 20:35:28,225 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 9 [2020-07-21 20:35:28,847 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-07-21 20:35:30,086 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 9 [2020-07-21 20:35:30,722 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-07-21 20:35:31,369 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 9 [2020-07-21 20:35:32,001 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 9 [2020-07-21 20:35:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:46,748 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2020-07-21 20:35:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-21 20:35:46,751 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 89 [2020-07-21 20:35:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:46,753 INFO L225 Difference]: With dead ends: 167 [2020-07-21 20:35:46,753 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 20:35:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11163 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=23060, Invalid=39690, Unknown=0, NotChecked=0, Total=62750 [2020-07-21 20:35:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 20:35:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-07-21 20:35:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 20:35:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-07-21 20:35:46,778 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 89 [2020-07-21 20:35:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:46,778 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-07-21 20:35:46,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-21 20:35:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-07-21 20:35:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-21 20:35:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:46,783 INFO L422 BasicCegarLoop]: trace histogram [120, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:46,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:46,985 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1451426972, now seen corresponding path program 8 times [2020-07-21 20:35:46,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:46,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588648774] [2020-07-21 20:35:46,987 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 20:35:47,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:35:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:47,210 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 20:35:47,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:47,395 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 20:35:47,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588648774] [2020-07-21 20:35:47,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:47,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 20:35:47,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472111875] [2020-07-21 20:35:47,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:35:47,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:35:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:35:47,397 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-07-21 20:35:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:47,526 INFO L93 Difference]: Finished difference Result 176 states and 201 transitions. [2020-07-21 20:35:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 20:35:47,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2020-07-21 20:35:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:47,531 INFO L225 Difference]: With dead ends: 176 [2020-07-21 20:35:47,532 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 20:35:47,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:35:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 20:35:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-07-21 20:35:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-21 20:35:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 191 transitions. [2020-07-21 20:35:47,552 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 191 transitions. Word has length 146 [2020-07-21 20:35:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:47,553 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 191 transitions. [2020-07-21 20:35:47,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:35:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 191 transitions. [2020-07-21 20:35:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-21 20:35:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:47,556 INFO L422 BasicCegarLoop]: trace histogram [120, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:47,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:47,772 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -699301936, now seen corresponding path program 9 times [2020-07-21 20:35:47,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:47,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429265257] [2020-07-21 20:35:47,774 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 20:35:47,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 20:35:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:48,142 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 20:35:48,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:48,665 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 20:35:48,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429265257] [2020-07-21 20:35:48,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:48,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 20:35:48,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167121975] [2020-07-21 20:35:48,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 20:35:48,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 20:35:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 20:35:48,669 INFO L87 Difference]: Start difference. First operand 171 states and 191 transitions. Second operand 24 states. [2020-07-21 20:35:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:48,900 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2020-07-21 20:35:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 20:35:48,902 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-07-21 20:35:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:48,904 INFO L225 Difference]: With dead ends: 224 [2020-07-21 20:35:48,905 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 20:35:48,905 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 20:35:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 20:35:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2020-07-21 20:35:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 20:35:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 263 transitions. [2020-07-21 20:35:48,929 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 263 transitions. Word has length 170 [2020-07-21 20:35:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:48,930 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 263 transitions. [2020-07-21 20:35:48,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 20:35:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 263 transitions. [2020-07-21 20:35:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 20:35:48,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:48,934 INFO L422 BasicCegarLoop]: trace histogram [120, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:49,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:49,148 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash -377226072, now seen corresponding path program 10 times [2020-07-21 20:35:49,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:49,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823756042] [2020-07-21 20:35:49,149 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 20:35:49,253 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 20:35:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:50,348 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 20:35:50,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:52,568 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 20:35:52,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823756042] [2020-07-21 20:35:52,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:52,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 20:35:52,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584038567] [2020-07-21 20:35:52,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 20:35:52,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 20:35:52,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 20:35:52,572 INFO L87 Difference]: Start difference. First operand 219 states and 263 transitions. Second operand 48 states. [2020-07-21 20:35:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:53,105 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2020-07-21 20:35:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 20:35:53,108 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 218 [2020-07-21 20:35:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:53,112 INFO L225 Difference]: With dead ends: 320 [2020-07-21 20:35:53,112 INFO L226 Difference]: Without dead ends: 315 [2020-07-21 20:35:53,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 20:35:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-07-21 20:35:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2020-07-21 20:35:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-21 20:35:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 407 transitions. [2020-07-21 20:35:53,132 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 407 transitions. Word has length 218 [2020-07-21 20:35:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:53,133 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 407 transitions. [2020-07-21 20:35:53,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 20:35:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 407 transitions. [2020-07-21 20:35:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-21 20:35:53,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:53,140 INFO L422 BasicCegarLoop]: trace histogram [120, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:53,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:53,354 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:53,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:53,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1906391464, now seen corresponding path program 11 times [2020-07-21 20:35:53,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:53,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57440463] [2020-07-21 20:35:53,357 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 20:35:53,484 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:53,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 20:35:53,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:56,655 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 20:35:56,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:04,711 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 20:36:04,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57440463] [2020-07-21 20:36:04,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:04,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 20:36:04,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744678251] [2020-07-21 20:36:04,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 20:36:04,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 20:36:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 20:36:04,714 INFO L87 Difference]: Start difference. First operand 315 states and 407 transitions. Second operand 96 states. [2020-07-21 20:36:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:06,379 INFO L93 Difference]: Finished difference Result 512 states and 747 transitions. [2020-07-21 20:36:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 20:36:06,381 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 314 [2020-07-21 20:36:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:06,386 INFO L225 Difference]: With dead ends: 512 [2020-07-21 20:36:06,386 INFO L226 Difference]: Without dead ends: 507 [2020-07-21 20:36:06,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 20:36:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-21 20:36:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2020-07-21 20:36:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-07-21 20:36:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 695 transitions. [2020-07-21 20:36:06,409 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 695 transitions. Word has length 314 [2020-07-21 20:36:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:06,410 INFO L479 AbstractCegarLoop]: Abstraction has 507 states and 695 transitions. [2020-07-21 20:36:06,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 20:36:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 695 transitions. [2020-07-21 20:36:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 20:36:06,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:06,420 INFO L422 BasicCegarLoop]: trace histogram [120, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:06,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:06,634 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1953208760, now seen corresponding path program 12 times [2020-07-21 20:36:06,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:06,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541219272] [2020-07-21 20:36:06,636 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 20:36:06,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 20:36:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:17,891 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 20:36:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:36:30,294 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 20:36:30,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541219272] [2020-07-21 20:36:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:36:30,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 103 [2020-07-21 20:36:30,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334985249] [2020-07-21 20:36:30,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-21 20:36:30,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-21 20:36:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 20:36:30,299 INFO L87 Difference]: Start difference. First operand 507 states and 695 transitions. Second operand 103 states. [2020-07-21 20:36:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:31,954 INFO L93 Difference]: Finished difference Result 540 states and 748 transitions. [2020-07-21 20:36:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 20:36:31,955 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 506 [2020-07-21 20:36:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:31,962 INFO L225 Difference]: With dead ends: 540 [2020-07-21 20:36:31,962 INFO L226 Difference]: Without dead ends: 535 [2020-07-21 20:36:31,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 821 SyntacticMatches, 89 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 20:36:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-07-21 20:36:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2020-07-21 20:36:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-07-21 20:36:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 737 transitions. [2020-07-21 20:36:31,991 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 737 transitions. Word has length 506 [2020-07-21 20:36:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:31,992 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 737 transitions. [2020-07-21 20:36:31,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-21 20:36:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 737 transitions. [2020-07-21 20:36:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-21 20:36:31,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:36:31,996 INFO L422 BasicCegarLoop]: trace histogram [120, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:36:32,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:32,197 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:36:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:36:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1254004406, now seen corresponding path program 13 times [2020-07-21 20:36:32,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:36:32,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697996474] [2020-07-21 20:36:32,199 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 20:36:32,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:36:32,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:36:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:36:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:36:32,550 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 20:36:32,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:36:32,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697996474] [2020-07-21 20:36:32,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:36:32,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:36:32,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845335228] [2020-07-21 20:36:32,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:36:32,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:36:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:36:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:36:32,552 INFO L87 Difference]: Start difference. First operand 535 states and 737 transitions. Second operand 5 states. [2020-07-21 20:36:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:36:32,617 INFO L93 Difference]: Finished difference Result 940 states and 1344 transitions. [2020-07-21 20:36:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:36:32,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 534 [2020-07-21 20:36:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:36:32,619 INFO L225 Difference]: With dead ends: 940 [2020-07-21 20:36:32,619 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:36:32,623 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 20:36:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:36:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:36:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:36:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:36:32,624 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 534 [2020-07-21 20:36:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:36:32,625 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:36:32,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:36:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:36:32,625 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:36:32,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:36:32,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:36:33,079 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 3 [2020-07-21 20:36:33,293 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 735 DAG size of output: 7 [2020-07-21 20:36:33,504 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:36:33,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:36:33,504 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:36:33,505 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:36:33,505 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:36:33,505 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:36:33,505 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:36:33,505 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 20:36:33,505 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:36:33,506 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 20:36:33,506 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-21 20:36:33,506 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-21 20:36:33,506 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-21 20:36:33,506 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 20:36:33,506 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 20:36:33,507 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 20:36:33,507 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 20:36:33,507 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-21 20:36:33,507 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-21 20:36:33,507 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 20:36:33,507 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:36:33,507 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 20:36:33,507 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 20:36:33,508 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 20:36:33,508 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 20:36:33,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:36:33 BoogieIcfgContainer [2020-07-21 20:36:33,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:36:33,532 INFO L168 Benchmark]: Toolchain (without parser) took 128377.60 ms. Allocated memory was 136.8 MB in the beginning and 576.2 MB in the end (delta: 439.4 MB). Free memory was 100.1 MB in the beginning and 161.4 MB in the end (delta: -61.3 MB). Peak memory consumption was 378.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:36:33,533 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:36:33,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.29 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 90.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:36:33,534 INFO L168 Benchmark]: Boogie Preprocessor took 131.24 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.4 MB in the beginning and 179.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:36:33,534 INFO L168 Benchmark]: RCFGBuilder took 312.92 ms. Allocated memory is still 199.8 MB. Free memory was 179.5 MB in the beginning and 166.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:36:33,535 INFO L168 Benchmark]: TraceAbstraction took 127599.07 ms. Allocated memory was 199.8 MB in the beginning and 576.2 MB in the end (delta: 376.4 MB). Free memory was 166.1 MB in the beginning and 161.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 381.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:36:33,537 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.29 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 90.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.24 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.4 MB in the beginning and 179.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.92 ms. Allocated memory is still 199.8 MB. Free memory was 179.5 MB in the beginning and 166.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 127599.07 ms. Allocated memory was 199.8 MB in the beginning and 576.2 MB in the end (delta: 376.4 MB). Free memory was 166.1 MB in the beginning and 161.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 381.2 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: 126.8s, OverallIterations: 16, TraceHistogramMax: 120, AutomataDifference: 63.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 236 SDtfs, 2303 SDslu, 2810 SDs, 0 SdLazy, 1254 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4075 GetRequests, 3207 SyntacticMatches, 89 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19455 ImplicationChecksByTransitivity, 113.3s 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, 0.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 58.2s InterpolantComputationTime, 2213 NumberOfCodeBlocks, 2151 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 3830 ConstructedInterpolants, 0 QuantifiedInterpolants, 3112042 SizeOfPredicates, 22 NumberOfNonLiveVariables, 4952 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...