/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:01:10,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:01:10,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:01:10,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:01:10,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:01:10,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:01:10,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:01:10,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:01:10,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:01:10,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:01:10,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:01:10,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:01:10,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:01:10,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:01:10,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:01:10,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:01:10,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:01:10,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:01:10,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:01:10,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:01:10,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:01:10,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:01:10,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:01:10,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:01:10,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:01:10,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:01:10,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:01:10,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:01:10,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 17:01:10,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:01:10,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:01:10,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:01:10,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:01:10,348 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:01:10,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:01:10,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:01:10,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:01:10,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:01:10,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:01:10,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:01:10,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:01:10,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:01:10,350 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:01:10,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:01:10,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:01:10,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:01:10,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:01:10,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:01:10,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:01:10,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:01:10,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:01:10,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:01:10,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:01:10,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:01:10,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:01:10,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:10,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:01:10,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:01:10,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:01:10,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:01:10,717 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:01:10,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:01:10,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:01:10,725 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:01:10,726 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-20 17:01:10,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71069cd9c/d5a08168e52d42e0b8e74f8e9bf64341/FLAGca02f0e1e [2020-07-20 17:01:11,458 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:01:11,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-20 17:01:11,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71069cd9c/d5a08168e52d42e0b8e74f8e9bf64341/FLAGca02f0e1e [2020-07-20 17:01:11,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71069cd9c/d5a08168e52d42e0b8e74f8e9bf64341 [2020-07-20 17:01:11,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:01:11,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:01:11,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:01:11,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:01:11,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:01:11,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:01:11" (1/1) ... [2020-07-20 17:01:11,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbf5c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:11, skipping insertion in model container [2020-07-20 17:01:11,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:01:11" (1/1) ... [2020-07-20 17:01:11,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:01:11,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:01:12,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:01:12,162 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:01:12,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:01:12,216 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:01:12,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12 WrapperNode [2020-07-20 17:01:12,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:01:12,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:01:12,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:01:12,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:01:12,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... [2020-07-20 17:01:12,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:01:12,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:01:12,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:01:12,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:01:12,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:01:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:01:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:01:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 17:01:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:01:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:01:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 17:01:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:01:12,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:01:12,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:01:12,885 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:01:12,886 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:01:12,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:01:12 BoogieIcfgContainer [2020-07-20 17:01:12,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:01:12,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:01:12,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:01:12,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:01:12,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:01:11" (1/3) ... [2020-07-20 17:01:12,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a43ec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:01:12, skipping insertion in model container [2020-07-20 17:01:12,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:01:12" (2/3) ... [2020-07-20 17:01:12,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a43ec42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:01:12, skipping insertion in model container [2020-07-20 17:01:12,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:01:12" (3/3) ... [2020-07-20 17:01:12,908 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-07-20 17:01:12,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:01:12,935 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:01:12,957 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:01:13,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:01:13,020 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:01:13,021 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:01:13,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:01:13,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:01:13,022 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:01:13,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:01:13,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:01:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 17:01:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:01:13,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:13,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:13,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 17:01:13,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:13,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088876249] [2020-07-20 17:01:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:13,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:01:13,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:01:13,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:01:13,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088876249] [2020-07-20 17:01:13,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:01:13,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:01:13,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181932456] [2020-07-20 17:01:13,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:01:13,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:13,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:01:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:01:13,434 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 17:01:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:13,567 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 17:01:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:01:13,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 17:01:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:13,585 INFO L225 Difference]: With dead ends: 30 [2020-07-20 17:01:13,586 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 17:01:13,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:01:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 17:01:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 17:01:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 17:01:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 17:01:13,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 17:01:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:13,653 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 17:01:13,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:01:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 17:01:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:01:13,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:13,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:13,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:13,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:13,877 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 17:01:13,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:13,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081416263] [2020-07-20 17:01:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:13,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:13,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:01:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:01:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:14,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:01:14,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081416263] [2020-07-20 17:01:14,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:14,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 17:01:14,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037955591] [2020-07-20 17:01:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:01:14,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:14,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:01:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:01:14,400 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 17:01:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:14,512 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 17:01:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:01:14,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 17:01:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:14,516 INFO L225 Difference]: With dead ends: 25 [2020-07-20 17:01:14,516 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 17:01:14,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:01:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 17:01:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 17:01:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 17:01:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 17:01:14,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 17:01:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:14,528 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 17:01:14,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:01:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 17:01:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:01:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:14,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:14,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:14,745 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 17:01:14,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:14,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568902196] [2020-07-20 17:01:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:14,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:14,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:01:14,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 17:01:14,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:15,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:15,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:15,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:15,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:01:15,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568902196] [2020-07-20 17:01:15,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:15,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 17:01:15,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956666347] [2020-07-20 17:01:15,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:01:15,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:01:15,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:01:15,307 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 17:01:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:15,406 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 17:01:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:01:15,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 17:01:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:15,409 INFO L225 Difference]: With dead ends: 28 [2020-07-20 17:01:15,409 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 17:01:15,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:01:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 17:01:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 17:01:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 17:01:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 17:01:15,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 17:01:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:15,419 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 17:01:15,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:01:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 17:01:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:01:15,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:15,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:15,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:15,638 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 17:01:15,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:15,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209497703] [2020-07-20 17:01:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:15,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 17:01:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:01:15,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:16,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:16,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:16,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:16,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:16,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 17:01:16,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209497703] [2020-07-20 17:01:16,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:16,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 17:01:16,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415851002] [2020-07-20 17:01:16,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:01:16,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:01:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:01:16,456 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 17:01:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:16,568 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 17:01:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:01:16,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 17:01:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:16,570 INFO L225 Difference]: With dead ends: 31 [2020-07-20 17:01:16,571 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 17:01:16,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:01:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 17:01:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 17:01:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:01:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 17:01:16,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 17:01:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:16,579 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 17:01:16,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:01:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 17:01:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:01:16,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:16,582 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:16,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:16,791 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:16,792 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 17:01:16,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:16,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702412025] [2020-07-20 17:01:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:16,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 17:01:16,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 17:01:16,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:17,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:17,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:17,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:17,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:17,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 17:01:18,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702412025] [2020-07-20 17:01:18,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:18,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 17:01:18,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019959543] [2020-07-20 17:01:18,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 17:01:18,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 17:01:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:01:18,013 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 17:01:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:18,159 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 17:01:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:01:18,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 17:01:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:18,165 INFO L225 Difference]: With dead ends: 34 [2020-07-20 17:01:18,166 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 17:01:18,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 17:01:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 17:01:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 17:01:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 17:01:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 17:01:18,176 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 17:01:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:18,176 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 17:01:18,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 17:01:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 17:01:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 17:01:18,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:18,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:18,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:18,384 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 17:01:18,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:18,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064577815] [2020-07-20 17:01:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:18,437 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 17:01:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 17:01:18,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:19,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:19,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:19,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:19,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:19,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:19,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:20,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 17:01:20,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064577815] [2020-07-20 17:01:20,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:20,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 17:01:20,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450928756] [2020-07-20 17:01:20,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 17:01:20,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 17:01:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 17:01:20,082 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 17:01:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:20,274 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 17:01:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:01:20,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 17:01:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:20,278 INFO L225 Difference]: With dead ends: 37 [2020-07-20 17:01:20,278 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 17:01:20,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:01:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 17:01:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 17:01:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:01:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 17:01:20,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 17:01:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:20,299 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 17:01:20,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 17:01:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 17:01:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 17:01:20,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:20,305 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:20,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:20,521 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 17:01:20,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:20,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631126802] [2020-07-20 17:01:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:20,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 17:01:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 17:01:20,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:21,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:21,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 17:01:22,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631126802] [2020-07-20 17:01:22,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:22,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 17:01:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307806542] [2020-07-20 17:01:22,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 17:01:22,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 17:01:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 17:01:22,962 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 17:01:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:23,169 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 17:01:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:01:23,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 17:01:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:23,174 INFO L225 Difference]: With dead ends: 40 [2020-07-20 17:01:23,174 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 17:01:23,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 17:01:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 17:01:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 17:01:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:01:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 17:01:23,182 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 17:01:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:23,183 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 17:01:23,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 17:01:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 17:01:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 17:01:23,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:23,185 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:23,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:23,395 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 17:01:23,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:23,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294267944] [2020-07-20 17:01:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:23,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 17:01:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 17:01:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:25,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:25,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 17:01:26,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294267944] [2020-07-20 17:01:26,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:26,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 17:01:26,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677693985] [2020-07-20 17:01:26,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 17:01:26,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 17:01:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 17:01:26,856 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 17:01:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:27,109 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 17:01:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:01:27,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 17:01:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:27,115 INFO L225 Difference]: With dead ends: 43 [2020-07-20 17:01:27,115 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:01:27,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 17:01:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:01:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 17:01:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 17:01:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 17:01:27,124 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 17:01:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:27,125 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 17:01:27,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 17:01:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 17:01:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 17:01:27,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:27,127 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:27,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:27,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 17:01:27,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:27,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538474770] [2020-07-20 17:01:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:27,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:27,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 17:01:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 17:01:27,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:29,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:29,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:30,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:31,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 17:01:32,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538474770] [2020-07-20 17:01:32,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:32,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 17:01:32,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631536178] [2020-07-20 17:01:32,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 17:01:32,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 17:01:32,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 17:01:32,347 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 17:01:32,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:32,579 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 17:01:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 17:01:32,580 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 17:01:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:32,582 INFO L225 Difference]: With dead ends: 46 [2020-07-20 17:01:32,583 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:01:32,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 17:01:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:01:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 17:01:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 17:01:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 17:01:32,592 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 17:01:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:32,592 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 17:01:32,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 17:01:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 17:01:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 17:01:32,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:32,594 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:32,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:32,809 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:32,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:32,810 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 17:01:32,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:32,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554771627] [2020-07-20 17:01:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:32,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:32,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 17:01:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 17:01:33,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:36,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:36,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:37,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:38,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:38,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 17:01:39,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554771627] [2020-07-20 17:01:39,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:39,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 17:01:39,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913867221] [2020-07-20 17:01:39,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 17:01:39,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 17:01:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 17:01:39,680 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 25 states. [2020-07-20 17:01:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:39,942 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 17:01:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 17:01:39,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-07-20 17:01:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:39,946 INFO L225 Difference]: With dead ends: 49 [2020-07-20 17:01:39,946 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 17:01:39,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 17:01:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 17:01:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 17:01:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:01:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 17:01:39,955 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 17:01:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:39,956 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 17:01:39,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 17:01:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 17:01:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 17:01:39,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:39,959 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:40,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:40,168 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 17:01:40,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:40,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045927752] [2020-07-20 17:01:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:40,366 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:40,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 17:01:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 17:01:40,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:44,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:45,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:45,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:47,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:47,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:47,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:47,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:48,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:48,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:48,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:48,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 17:01:49,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045927752] [2020-07-20 17:01:49,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:01:49,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 17:01:49,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277165027] [2020-07-20 17:01:49,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 17:01:49,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:01:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 17:01:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 17:01:49,644 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states. [2020-07-20 17:01:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:01:49,978 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 17:01:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 17:01:49,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-07-20 17:01:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:01:49,980 INFO L225 Difference]: With dead ends: 52 [2020-07-20 17:01:49,980 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 17:01:49,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 17:01:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 17:01:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 17:01:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 17:01:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 17:01:50,000 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 17:01:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:01:50,001 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 17:01:50,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 17:01:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 17:01:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 17:01:50,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:01:50,006 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:01:50,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:50,209 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:01:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:01:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 17:01:50,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:01:50,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653444412] [2020-07-20 17:01:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:01:50,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:01:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:01:50,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 17:01:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:01:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 17:01:50,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:01:56,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:58,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:59,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:01:59,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:00,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:00,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:01,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:01,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:02,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:02,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 17:02:03,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653444412] [2020-07-20 17:02:03,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:02:03,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 17:02:03,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481955600] [2020-07-20 17:02:03,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 17:02:03,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:02:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 17:02:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 17:02:03,857 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 29 states. [2020-07-20 17:02:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:02:04,371 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 17:02:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 17:02:04,373 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-07-20 17:02:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:02:04,375 INFO L225 Difference]: With dead ends: 55 [2020-07-20 17:02:04,375 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 17:02:04,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 17:02:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 17:02:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 17:02:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 17:02:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 17:02:04,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 17:02:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:02:04,386 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 17:02:04,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 17:02:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 17:02:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 17:02:04,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:02:04,389 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:02:04,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:04,604 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:02:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:02:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 17:02:04,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:02:04,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218967158] [2020-07-20 17:02:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:04,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:02:04,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:02:04,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 17:02:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:02:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 17:02:05,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:02:11,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:14,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:14,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:16,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:16,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:18,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:18,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:19,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:19,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:20,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:20,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:21,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 17:02:22,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218967158] [2020-07-20 17:02:22,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:02:22,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2020-07-20 17:02:22,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141982146] [2020-07-20 17:02:22,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 17:02:22,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:02:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 17:02:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-07-20 17:02:22,959 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 31 states. [2020-07-20 17:02:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:02:23,548 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 17:02:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 17:02:23,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-07-20 17:02:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:02:23,551 INFO L225 Difference]: With dead ends: 58 [2020-07-20 17:02:23,551 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 17:02:23,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 114 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 17:02:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 17:02:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 17:02:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 17:02:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 17:02:23,569 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 17:02:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:02:23,570 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 17:02:23,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 17:02:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 17:02:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 17:02:23,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:02:23,575 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:02:23,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:23,781 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:02:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:02:23,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 17:02:23,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:02:23,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027762368] [2020-07-20 17:02:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:24,261 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:02:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:02:24,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 17:02:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:02:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 17:02:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:02:26,652 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:02:27,140 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:27,247 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:27,359 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:27,464 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:27,581 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:02:27,697 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:02:27,819 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 17:02:27,938 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 17:02:28,061 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 17:02:28,178 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-20 17:02:28,287 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 17:02:28,391 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 17:02:31,749 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:02:31,861 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:02:31,975 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:32,084 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:32,199 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:32,317 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:32,446 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:02:32,565 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 17:02:32,668 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:02:33,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:33,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:35,830 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:02:36,036 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:02:36,241 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:02:36,699 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 17:02:37,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:37,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:40,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:40,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:42,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:45,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:46,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:48,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:49,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:49,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:50,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:02:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-07-20 17:02:51,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027762368] [2020-07-20 17:02:51,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:02:51,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 33 [2020-07-20 17:02:51,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721846475] [2020-07-20 17:02:51,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 17:02:51,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:02:51,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 17:02:51,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 17:02:51,071 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 33 states. [2020-07-20 17:02:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:02:51,830 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 17:02:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 17:02:51,833 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-07-20 17:02:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:02:51,835 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:02:51,835 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 17:02:51,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 17:02:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 17:02:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 17:02:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 17:02:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 17:02:51,844 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 17:02:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:02:51,845 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 17:02:51,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 17:02:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 17:02:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 17:02:51,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:02:51,847 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:02:52,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:52,051 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:02:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:02:52,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 17:02:52,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:02:52,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972597639] [2020-07-20 17:02:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:02:52,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:02:52,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:02:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 17:02:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:02:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 17:02:53,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:02:55,457 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:02:55,563 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:02:55,679 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:02:55,791 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:02:55,912 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:02:56,029 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:02:56,152 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:56,277 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:02:56,405 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:56,535 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:02:56,673 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:02:56,824 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:02:56,964 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:02:57,104 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:02:57,256 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 17:02:57,402 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 17:02:57,563 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:02:57,722 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:02:57,889 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 17:02:58,037 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 17:02:58,180 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 17:02:58,318 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:02:58,450 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 17:02:58,573 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:02:58,696 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 17:02:58,806 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:02:58,913 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:02:59,015 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 17:03:02,028 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:02,135 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:02,250 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:02,362 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:02,483 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:02,597 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:02,727 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:02,853 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:02,986 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:03:03,130 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:03:03,271 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:03:03,408 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:03:03,555 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:03:03,695 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:03:03,845 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:03:03,991 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:03:04,136 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 17:03:04,272 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 17:03:04,410 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:03:04,534 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 17:03:04,663 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:03:04,780 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 17:03:04,893 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:03:04,999 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 17:03:05,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:08,060 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:08,170 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:08,283 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:08,395 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:08,509 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:08,626 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:08,754 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:08,877 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:09,003 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:09,137 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:09,273 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:03:09,410 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 17:03:09,553 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:03:09,696 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 17:03:09,838 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 17:03:09,959 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 17:03:10,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:12,402 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 17:03:12,506 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:12,615 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:12,729 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:12,839 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:12,962 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:13,075 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:13,204 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:13,330 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 17:03:13,464 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:13,594 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 17:03:13,722 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 17:03:13,840 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 17:03:13,949 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:03:14,057 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 17:03:14,525 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 17:03:14,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:17,173 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:17,286 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:17,399 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 17:03:17,518 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:17,636 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 17:03:17,787 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 17:03:17,888 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 17:03:17,990 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 17:03:18,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:20,963 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 17:03:21,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:21,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:24,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:24,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:26,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:26,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:27,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:27,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:28,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:28,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:29,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:29,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:30,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:31,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:03:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-20 17:03:31,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972597639] [2020-07-20 17:03:31,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:03:31,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 34 [2020-07-20 17:03:31,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885882772] [2020-07-20 17:03:31,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 17:03:31,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:03:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 17:03:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 17:03:31,404 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-07-20 17:03:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:03:32,589 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 17:03:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 17:03:32,593 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-07-20 17:03:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:03:32,594 INFO L225 Difference]: With dead ends: 64 [2020-07-20 17:03:32,594 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:03:32,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=800, Invalid=1552, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 17:03:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:03:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 17:03:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 17:03:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 17:03:32,605 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 17:03:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:03:32,606 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 17:03:32,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 17:03:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 17:03:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 17:03:32,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:03:32,608 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:03:32,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:03:32,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:03:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:03:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 17:03:32,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:03:32,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869137615] [2020-07-20 17:03:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:03:33,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:03:33,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:03:33,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-20 17:03:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:03:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2020-07-20 17:03:33,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:03:33,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869137615] [2020-07-20 17:03:33,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:03:33,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:03:33,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158531690] [2020-07-20 17:03:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:03:33,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:03:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:03:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:03:33,798 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 7 states. [2020-07-20 17:03:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:03:33,962 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-07-20 17:03:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:03:33,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-07-20 17:03:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:03:33,967 INFO L225 Difference]: With dead ends: 60 [2020-07-20 17:03:33,967 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:03:33,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:03:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:03:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:03:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:03:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:03:33,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-07-20 17:03:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:03:33,971 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:03:33,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:03:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:03:33,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:03:34,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:03:34,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:03:34,341 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:03:34,341 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:03:34,341 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:03:34,342 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:03:34,342 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:03:34,342 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:03:34,342 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 17:03:34,342 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2020-07-20 17:03:34,343 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 17:03:34,344 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 17:03:34,344 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 17:03:34,344 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 17:03:34,345 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 17:03:34,345 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 17:03:34,345 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 17:03:34,345 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 17:03:34,346 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 17:03:34,346 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (<= 15 main_~a~0) [2020-07-20 17:03:34,346 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 17:03:34,346 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 17:03:34,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:03:34 BoogieIcfgContainer [2020-07-20 17:03:34,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:03:34,360 INFO L168 Benchmark]: Toolchain (without parser) took 142556.78 ms. Allocated memory was 145.2 MB in the beginning and 561.0 MB in the end (delta: 415.8 MB). Free memory was 101.3 MB in the beginning and 122.8 MB in the end (delta: -21.5 MB). Peak memory consumption was 394.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:03:34,363 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 145.2 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:03:34,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.75 ms. Allocated memory is still 145.2 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:03:34,364 INFO L168 Benchmark]: Boogie Preprocessor took 55.61 ms. Allocated memory is still 145.2 MB. Free memory was 91.7 MB in the beginning and 90.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:03:34,365 INFO L168 Benchmark]: RCFGBuilder took 615.37 ms. Allocated memory was 145.2 MB in the beginning and 206.0 MB in the end (delta: 60.8 MB). Free memory was 90.0 MB in the beginning and 174.4 MB in the end (delta: -84.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:03:34,366 INFO L168 Benchmark]: TraceAbstraction took 141463.47 ms. Allocated memory was 206.0 MB in the beginning and 561.0 MB in the end (delta: 354.9 MB). Free memory was 173.4 MB in the beginning and 122.8 MB in the end (delta: 50.6 MB). Peak memory consumption was 405.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:03:34,367 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 145.2 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.75 ms. Allocated memory is still 145.2 MB. Free memory was 100.9 MB in the beginning and 91.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.61 ms. Allocated memory is still 145.2 MB. Free memory was 91.7 MB in the beginning and 90.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 615.37 ms. Allocated memory was 145.2 MB in the beginning and 206.0 MB in the end (delta: 60.8 MB). Free memory was 90.0 MB in the beginning and 174.4 MB in the end (delta: -84.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 141463.47 ms. Allocated memory was 206.0 MB in the beginning and 561.0 MB in the end (delta: 354.9 MB). Free memory was 173.4 MB in the beginning and 122.8 MB in the end (delta: 50.6 MB). Peak memory consumption was 405.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 141.1s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 192 SDtfs, 1546 SDslu, 1434 SDs, 0 SdLazy, 963 SolverSat, 655 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1846 GetRequests, 1198 SyntacticMatches, 239 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3555 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 128.4s InterpolantComputationTime, 928 NumberOfCodeBlocks, 506 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1710 ConstructedInterpolants, 0 QuantifiedInterpolants, 378720 SizeOfPredicates, 167 NumberOfNonLiveVariables, 2046 ConjunctsInSsa, 465 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 2825/6990 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...