/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:38:10,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:38:10,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:38:10,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:38:10,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:38:10,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:38:10,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:38:10,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:38:10,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:38:10,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:38:10,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:38:10,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:38:10,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:38:10,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:38:10,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:38:10,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:38:10,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:38:10,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:38:10,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:38:10,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:38:10,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:38:10,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:38:10,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:38:10,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:38:10,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:38:10,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:38:10,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:38:10,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:38:10,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:38:10,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:38:10,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:38:10,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:38:10,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:38:10,242 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:38:10,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:38:10,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:38:10,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:38:10,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:38:10,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:38:10,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:38:10,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:38:10,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:38:10,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:38:10,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:38:10,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:38:10,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:38:10,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:38:10,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:38:10,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:38:10,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:38:10,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:38:10,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:38:10,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:38:10,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:38:10,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:38:10,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:10,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:38:10,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:38:10,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:38:10,549 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:38:10,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:38:10,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:38:10,572 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:38:10,572 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:38:10,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 19:38:10,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5199f0c/075ff6303a14498b9dffb9f6a6b13704/FLAGcb65889ee [2020-07-21 19:38:11,283 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:38:11,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-21 19:38:11,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5199f0c/075ff6303a14498b9dffb9f6a6b13704/FLAGcb65889ee [2020-07-21 19:38:11,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5199f0c/075ff6303a14498b9dffb9f6a6b13704 [2020-07-21 19:38:11,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:38:11,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:38:11,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:38:11,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:38:11,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:38:11,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:38:11" (1/1) ... [2020-07-21 19:38:11,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b47dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:11, skipping insertion in model container [2020-07-21 19:38:11,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:38:11" (1/1) ... [2020-07-21 19:38:11,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:38:11,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:38:11,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:38:12,000 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:38:12,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:38:12,036 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:38:12,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12 WrapperNode [2020-07-21 19:38:12,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:38:12,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:38:12,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:38:12,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:38:12,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (1/1) ... [2020-07-21 19:38:12,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:38:12,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:38:12,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:38:12,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:38:12,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (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 [2020-07-21 19:38:12,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:38:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:38:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:38:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:38:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:38:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:38:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:38:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:38:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:38:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:38:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:38:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:38:12,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:38:12,499 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:38:12,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:38:12 BoogieIcfgContainer [2020-07-21 19:38:12,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:38:12,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:38:12,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:38:12,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:38:12,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:38:11" (1/3) ... [2020-07-21 19:38:12,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc4e6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:38:12, skipping insertion in model container [2020-07-21 19:38:12,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:38:12" (2/3) ... [2020-07-21 19:38:12,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc4e6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:38:12, skipping insertion in model container [2020-07-21 19:38:12,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:38:12" (3/3) ... [2020-07-21 19:38:12,514 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-21 19:38:12,528 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:38:12,537 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:38:12,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:38:12,583 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:38:12,583 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:38:12,583 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:38:12,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:38:12,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:38:12,584 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:38:12,584 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:38:12,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:38:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:38:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:38:12,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:12,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:12,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:38:12,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:12,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402573290] [2020-07-21 19:38:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:12,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:38:12,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:38:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:38:12,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:38:12,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402573290] [2020-07-21 19:38:12,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:38:12,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:38:12,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850540137] [2020-07-21 19:38:12,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:38:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:38:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:38:12,926 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:38:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:13,060 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:38:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:38:13,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:38:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:13,075 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:38:13,076 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:38:13,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:38:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:38:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:38:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:38:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:38:13,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:38:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:13,148 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:38:13,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:38:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:38:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:38:13,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:13,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:13,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:13,367 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:38:13,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:13,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700247685] [2020-07-21 19:38:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:13,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:38:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:38:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:38:13,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:38:13,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700247685] [2020-07-21 19:38:13,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:38:13,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:38:13,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953943060] [2020-07-21 19:38:13,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:38:13,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:38:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:38:13,452 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:38:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:13,568 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:38:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:38:13,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:38:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:13,571 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:38:13,571 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:38:13,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:38:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:38:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:38:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:38:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:38:13,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:38:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:13,584 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:38:13,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:38:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:38:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:38:13,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:13,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:13,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:13,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:38:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:13,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796487609] [2020-07-21 19:38:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:13,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:38:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:38:13,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:14,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:14,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:38:14,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796487609] [2020-07-21 19:38:14,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:14,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:38:14,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632050334] [2020-07-21 19:38:14,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:38:14,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:14,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:38:14,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:38:14,241 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 19:38:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:14,411 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:38:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:38:14,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 19:38:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:14,414 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:38:14,415 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:38:14,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:38:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:38:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:38:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:38:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:38:14,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:38:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:14,426 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:38:14,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:38:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:38:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:38:14,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:14,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:14,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:14,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:38:14,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:14,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918239834] [2020-07-21 19:38:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:14,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:14,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:38:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:38:14,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:14,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:14,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:38:14,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918239834] [2020-07-21 19:38:14,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:14,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:38:14,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436880550] [2020-07-21 19:38:14,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:38:14,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:38:14,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:38:14,939 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:38:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:15,076 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 19:38:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:38:15,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:38:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:15,082 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:38:15,082 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:38:15,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:38:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:38:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 19:38:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:38:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:38:15,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 19:38:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:15,116 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:38:15,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:38:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:38:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:38:15,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:15,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:15,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:15,341 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:38:15,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:15,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957218303] [2020-07-21 19:38:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:15,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:15,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:15,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:38:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:38:15,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:15,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:15,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:15,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:38:15,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957218303] [2020-07-21 19:38:15,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:15,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:38:15,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133261815] [2020-07-21 19:38:15,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:38:15,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:38:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:38:15,899 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 19:38:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:16,098 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 19:38:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:38:16,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 19:38:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:16,101 INFO L225 Difference]: With dead ends: 51 [2020-07-21 19:38:16,101 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:38:16,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:38:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 19:38:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:38:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:38:16,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 19:38:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:16,119 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:38:16,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:38:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:38:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:38:16,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:16,123 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:16,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:16,325 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:16,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 19:38:16,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:16,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507346797] [2020-07-21 19:38:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:16,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:16,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:38:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:38:16,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:16,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:16,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:16,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:38:16,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507346797] [2020-07-21 19:38:16,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:16,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:38:16,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642263304] [2020-07-21 19:38:16,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:38:16,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:38:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:38:16,772 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 19:38:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:16,964 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 19:38:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:38:16,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 19:38:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:16,971 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:38:16,971 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:38:16,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:38:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 19:38:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:38:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:38:16,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 19:38:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:17,005 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:38:17,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:38:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:38:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 19:38:17,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:17,014 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:17,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:17,230 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 19:38:17,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:17,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965966870] [2020-07-21 19:38:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:17,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 19:38:17,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:17,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:17,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:17,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:17,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:38:17,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965966870] [2020-07-21 19:38:17,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:17,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:38:17,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652646302] [2020-07-21 19:38:17,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:38:17,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:17,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:38:17,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:38:17,947 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 19:38:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:18,153 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 19:38:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:18,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 19:38:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:18,157 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:38:18,157 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:38:18,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:38:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:38:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 19:38:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:38:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:38:18,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 19:38:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:18,172 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:38:18,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:38:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:38:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 19:38:18,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:18,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:18,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:18,389 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 19:38:18,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:18,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115632890] [2020-07-21 19:38:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:18,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:18,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 19:38:18,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:18,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:18,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:19,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:19,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:19,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:38:19,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115632890] [2020-07-21 19:38:19,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:19,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:38:19,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135043905] [2020-07-21 19:38:19,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:38:19,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:19,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:38:19,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:38:19,144 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 19:38:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:19,370 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 19:38:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:19,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 19:38:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:19,374 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:38:19,374 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:38:19,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:38:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:38:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 19:38:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:38:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:38:19,387 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 19:38:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:19,387 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:38:19,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:38:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:38:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 19:38:19,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:19,389 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:19,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:19,606 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 19:38:19,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:19,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405011963] [2020-07-21 19:38:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:19,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 19:38:19,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:20,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 19:38:20,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405011963] [2020-07-21 19:38:20,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:20,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:38:20,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250051837] [2020-07-21 19:38:20,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:38:20,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:38:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:38:20,782 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 19:38:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:21,069 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 19:38:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:21,070 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 19:38:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:21,072 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:38:21,072 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:38:21,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:38:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:38:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 19:38:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:38:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:38:21,087 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 19:38:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:21,088 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:38:21,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:38:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:38:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:38:21,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:21,090 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:21,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:21,306 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 19:38:21,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:21,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234760304] [2020-07-21 19:38:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:21,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:21,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 19:38:21,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:22,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:22,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:22,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:22,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 19:38:22,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234760304] [2020-07-21 19:38:22,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:22,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:22,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601006929] [2020-07-21 19:38:22,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:22,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:22,481 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states. [2020-07-21 19:38:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:22,736 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 19:38:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:22,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-07-21 19:38:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:22,739 INFO L225 Difference]: With dead ends: 76 [2020-07-21 19:38:22,739 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 19:38:22,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 19:38:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 19:38:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:38:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:38:22,772 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 19:38:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:22,774 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:38:22,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:38:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 19:38:22,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:22,781 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:22,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:22,992 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 19:38:22,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:22,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318278052] [2020-07-21 19:38:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:23,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:38:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 19:38:23,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:24,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:24,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 19:38:25,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318278052] [2020-07-21 19:38:25,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:25,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:38:25,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416033489] [2020-07-21 19:38:25,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:38:25,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:38:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:25,017 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states. [2020-07-21 19:38:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:25,332 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 19:38:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:38:25,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 208 [2020-07-21 19:38:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:25,340 INFO L225 Difference]: With dead ends: 81 [2020-07-21 19:38:25,341 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 19:38:25,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:38:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 19:38:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 19:38:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:38:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:38:25,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 19:38:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:25,371 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:38:25,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:38:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:38:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 19:38:25,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:25,374 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:25,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:25,590 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:25,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times [2020-07-21 19:38:25,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:25,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724799483] [2020-07-21 19:38:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:25,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-21 19:38:25,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:26,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2020-07-21 19:38:26,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724799483] [2020-07-21 19:38:26,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:26,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:26,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444438815] [2020-07-21 19:38:26,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:26,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:26,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:26,933 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states. [2020-07-21 19:38:27,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:27,181 INFO L93 Difference]: Finished difference Result 99 states and 221 transitions. [2020-07-21 19:38:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:27,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 19:38:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:27,188 INFO L225 Difference]: With dead ends: 99 [2020-07-21 19:38:27,188 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 19:38:27,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 19:38:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2020-07-21 19:38:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 19:38:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions. [2020-07-21 19:38:27,203 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148 [2020-07-21 19:38:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:27,204 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 92 transitions. [2020-07-21 19:38:27,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions. [2020-07-21 19:38:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-21 19:38:27,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:27,207 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:27,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:27,422 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times [2020-07-21 19:38:27,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:27,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906703532] [2020-07-21 19:38:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:27,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:27,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-07-21 19:38:27,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:28,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:28,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:28,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:28,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-07-21 19:38:28,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906703532] [2020-07-21 19:38:28,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:28,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:28,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451165175] [2020-07-21 19:38:28,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:28,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:28,309 INFO L87 Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states. [2020-07-21 19:38:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:28,511 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2020-07-21 19:38:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:28,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2020-07-21 19:38:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:28,514 INFO L225 Difference]: With dead ends: 99 [2020-07-21 19:38:28,514 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 19:38:28,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 19:38:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2020-07-21 19:38:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 19:38:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions. [2020-07-21 19:38:28,525 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123 [2020-07-21 19:38:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:28,526 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 98 transitions. [2020-07-21 19:38:28,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions. [2020-07-21 19:38:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 19:38:28,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:28,529 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:28,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:28,744 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times [2020-07-21 19:38:28,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:28,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184795991] [2020-07-21 19:38:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:28,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:28,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:38:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 290 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-07-21 19:38:29,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:30,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:30,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2020-07-21 19:38:31,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184795991] [2020-07-21 19:38:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:38:31,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182379625] [2020-07-21 19:38:31,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:38:31,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:38:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:31,013 INFO L87 Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states. [2020-07-21 19:38:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:31,410 INFO L93 Difference]: Finished difference Result 113 states and 271 transitions. [2020-07-21 19:38:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:38:31,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 216 [2020-07-21 19:38:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:31,418 INFO L225 Difference]: With dead ends: 113 [2020-07-21 19:38:31,419 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:38:31,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 403 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:38:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:38:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-21 19:38:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 19:38:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions. [2020-07-21 19:38:31,443 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216 [2020-07-21 19:38:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:31,445 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 104 transitions. [2020-07-21 19:38:31,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:38:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions. [2020-07-21 19:38:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 19:38:31,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:31,450 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:31,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:31,665 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:31,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times [2020-07-21 19:38:31,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:31,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651551149] [2020-07-21 19:38:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:31,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2020-07-21 19:38:31,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:32,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-21 19:38:32,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651551149] [2020-07-21 19:38:32,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:32,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:32,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528116827] [2020-07-21 19:38:32,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:32,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:32,914 INFO L87 Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states. [2020-07-21 19:38:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:33,146 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2020-07-21 19:38:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:33,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-07-21 19:38:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:33,150 INFO L225 Difference]: With dead ends: 107 [2020-07-21 19:38:33,155 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 19:38:33,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 19:38:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-07-21 19:38:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 19:38:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions. [2020-07-21 19:38:33,175 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135 [2020-07-21 19:38:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:33,176 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 112 transitions. [2020-07-21 19:38:33,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions. [2020-07-21 19:38:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 19:38:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:33,180 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:33,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:33,395 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times [2020-07-21 19:38:33,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:33,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26260544] [2020-07-21 19:38:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:33,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:38:33,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 114 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-07-21 19:38:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:34,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:34,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:34,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:34,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:34,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 19:38:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26260544] [2020-07-21 19:38:35,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:35,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:38:35,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039665520] [2020-07-21 19:38:35,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:38:35,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:38:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:35,284 INFO L87 Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states. [2020-07-21 19:38:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:35,692 INFO L93 Difference]: Finished difference Result 107 states and 197 transitions. [2020-07-21 19:38:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:38:35,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2020-07-21 19:38:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:35,696 INFO L225 Difference]: With dead ends: 107 [2020-07-21 19:38:35,696 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 19:38:35,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:38:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 19:38:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-21 19:38:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 19:38:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2020-07-21 19:38:35,710 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163 [2020-07-21 19:38:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:35,710 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2020-07-21 19:38:35,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:38:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2020-07-21 19:38:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-21 19:38:35,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:35,713 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:35,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:35,928 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2020-07-21 19:38:35,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:35,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333141845] [2020-07-21 19:38:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:36,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-07-21 19:38:36,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:36,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:36,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:36,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:36,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:36,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-07-21 19:38:36,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333141845] [2020-07-21 19:38:36,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:36,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:36,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107354553] [2020-07-21 19:38:36,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:36,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:36,903 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states. [2020-07-21 19:38:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:37,112 INFO L93 Difference]: Finished difference Result 107 states and 179 transitions. [2020-07-21 19:38:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:37,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-07-21 19:38:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:37,115 INFO L225 Difference]: With dead ends: 107 [2020-07-21 19:38:37,116 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 19:38:37,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 19:38:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-21 19:38:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 19:38:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-07-21 19:38:37,135 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136 [2020-07-21 19:38:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:37,135 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-07-21 19:38:37,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-07-21 19:38:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 19:38:37,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:37,139 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:37,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:37,352 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times [2020-07-21 19:38:37,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:37,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174605861] [2020-07-21 19:38:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:37,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-07-21 19:38:37,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:38,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-07-21 19:38:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174605861] [2020-07-21 19:38:38,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:38,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:38,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020299034] [2020-07-21 19:38:38,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:38,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:38,903 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states. [2020-07-21 19:38:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:39,168 INFO L93 Difference]: Finished difference Result 117 states and 203 transitions. [2020-07-21 19:38:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:39,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-07-21 19:38:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:39,171 INFO L225 Difference]: With dead ends: 117 [2020-07-21 19:38:39,172 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 19:38:39,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 271 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 19:38:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-21 19:38:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 19:38:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 19:38:39,190 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148 [2020-07-21 19:38:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:39,191 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 19:38:39,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 19:38:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-21 19:38:39,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:39,193 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:39,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:39,403 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times [2020-07-21 19:38:39,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:39,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716117815] [2020-07-21 19:38:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:39,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 19:38:39,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:40,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 19:38:40,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716117815] [2020-07-21 19:38:40,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:40,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:40,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358095848] [2020-07-21 19:38:40,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:40,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:40,431 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 19:38:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:40,627 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2020-07-21 19:38:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:40,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2020-07-21 19:38:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:40,630 INFO L225 Difference]: With dead ends: 114 [2020-07-21 19:38:40,630 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 19:38:40,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 19:38:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-07-21 19:38:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 19:38:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions. [2020-07-21 19:38:40,644 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149 [2020-07-21 19:38:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:40,646 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 128 transitions. [2020-07-21 19:38:40,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions. [2020-07-21 19:38:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-21 19:38:40,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:40,649 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:40,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:40,863 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times [2020-07-21 19:38:40,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:40,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657668726] [2020-07-21 19:38:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:41,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-21 19:38:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:41,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:41,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:41,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:41,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:41,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 19:38:42,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657668726] [2020-07-21 19:38:42,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:42,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:42,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755136978] [2020-07-21 19:38:42,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:42,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:42,046 INFO L87 Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states. [2020-07-21 19:38:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:42,279 INFO L93 Difference]: Finished difference Result 106 states and 183 transitions. [2020-07-21 19:38:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:42,280 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2020-07-21 19:38:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:42,284 INFO L225 Difference]: With dead ends: 106 [2020-07-21 19:38:42,284 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 19:38:42,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 19:38:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-07-21 19:38:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 19:38:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions. [2020-07-21 19:38:42,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150 [2020-07-21 19:38:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:42,311 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 161 transitions. [2020-07-21 19:38:42,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions. [2020-07-21 19:38:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-07-21 19:38:42,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:42,316 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:42,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:42,530 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times [2020-07-21 19:38:42,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:42,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756528076] [2020-07-21 19:38:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:42,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2020-07-21 19:38:42,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:43,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2020-07-21 19:38:43,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756528076] [2020-07-21 19:38:43,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:43,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:43,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638090676] [2020-07-21 19:38:43,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:43,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:43,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:43,982 INFO L87 Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states. [2020-07-21 19:38:44,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:44,259 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-21 19:38:44,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:44,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 162 [2020-07-21 19:38:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:44,263 INFO L225 Difference]: With dead ends: 117 [2020-07-21 19:38:44,263 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 19:38:44,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 19:38:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-07-21 19:38:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 19:38:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions. [2020-07-21 19:38:44,277 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162 [2020-07-21 19:38:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:44,278 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 158 transitions. [2020-07-21 19:38:44,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions. [2020-07-21 19:38:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-21 19:38:44,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:44,281 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:44,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:44,496 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times [2020-07-21 19:38:44,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:44,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741052163] [2020-07-21 19:38:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:44,676 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-07-21 19:38:44,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:45,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-07-21 19:38:45,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741052163] [2020-07-21 19:38:45,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:45,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:45,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800285687] [2020-07-21 19:38:45,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:45,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:45,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:45,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:45,602 INFO L87 Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states. [2020-07-21 19:38:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:45,796 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2020-07-21 19:38:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:45,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-07-21 19:38:45,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:45,802 INFO L225 Difference]: With dead ends: 129 [2020-07-21 19:38:45,803 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 19:38:45,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 19:38:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-07-21 19:38:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 19:38:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 19:38:45,819 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163 [2020-07-21 19:38:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:45,819 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 19:38:45,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 19:38:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-07-21 19:38:45,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:45,825 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:46,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:46,040 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times [2020-07-21 19:38:46,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:46,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660517467] [2020-07-21 19:38:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:46,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:38:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-07-21 19:38:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:46,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:46,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:46,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:46,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2020-07-21 19:38:46,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660517467] [2020-07-21 19:38:46,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:46,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 19:38:46,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341305701] [2020-07-21 19:38:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:38:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:38:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:38:46,958 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states. [2020-07-21 19:38:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:47,106 INFO L93 Difference]: Finished difference Result 131 states and 225 transitions. [2020-07-21 19:38:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:38:47,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 164 [2020-07-21 19:38:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:47,109 INFO L225 Difference]: With dead ends: 131 [2020-07-21 19:38:47,110 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 19:38:47,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:38:47,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 19:38:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-07-21 19:38:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 19:38:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2020-07-21 19:38:47,123 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164 [2020-07-21 19:38:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:47,124 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2020-07-21 19:38:47,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:38:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2020-07-21 19:38:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-21 19:38:47,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:47,127 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:47,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:47,342 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times [2020-07-21 19:38:47,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:47,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208527618] [2020-07-21 19:38:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:47,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:47,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:38:47,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-07-21 19:38:47,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:48,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:48,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:48,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:48,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:48,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-07-21 19:38:48,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208527618] [2020-07-21 19:38:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:48,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:38:48,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217355085] [2020-07-21 19:38:48,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:38:48,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:38:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:38:48,589 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states. [2020-07-21 19:38:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:48,765 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2020-07-21 19:38:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:38:48,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-07-21 19:38:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:48,769 INFO L225 Difference]: With dead ends: 110 [2020-07-21 19:38:48,769 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 19:38:48,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 19:38:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-07-21 19:38:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 19:38:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions. [2020-07-21 19:38:48,780 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176 [2020-07-21 19:38:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:48,781 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 149 transitions. [2020-07-21 19:38:48,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:38:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions. [2020-07-21 19:38:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-21 19:38:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:48,784 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:48,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:48,999 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times [2020-07-21 19:38:49,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:49,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018966946] [2020-07-21 19:38:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:49,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:49,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:49,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 45 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-07-21 19:38:49,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:49,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-07-21 19:38:50,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018966946] [2020-07-21 19:38:50,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:50,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:50,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162308397] [2020-07-21 19:38:50,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:50,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:50,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:50,527 INFO L87 Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states. [2020-07-21 19:38:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:50,819 INFO L93 Difference]: Finished difference Result 123 states and 202 transitions. [2020-07-21 19:38:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:38:50,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2020-07-21 19:38:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:50,827 INFO L225 Difference]: With dead ends: 123 [2020-07-21 19:38:50,828 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 19:38:50,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:38:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 19:38:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-07-21 19:38:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 19:38:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions. [2020-07-21 19:38:50,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191 [2020-07-21 19:38:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:50,849 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 173 transitions. [2020-07-21 19:38:50,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:38:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions. [2020-07-21 19:38:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-21 19:38:50,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:50,853 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:51,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:51,069 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times [2020-07-21 19:38:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:51,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794461158] [2020-07-21 19:38:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:51,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:38:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-07-21 19:38:51,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:52,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:52,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:53,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:53,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:53,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2020-07-21 19:38:53,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794461158] [2020-07-21 19:38:53,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:53,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:38:53,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337645335] [2020-07-21 19:38:53,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:38:53,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:38:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:38:53,283 INFO L87 Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states. [2020-07-21 19:38:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:53,610 INFO L93 Difference]: Finished difference Result 121 states and 205 transitions. [2020-07-21 19:38:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:38:53,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 204 [2020-07-21 19:38:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:53,615 INFO L225 Difference]: With dead ends: 121 [2020-07-21 19:38:53,615 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 19:38:53,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:38:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 19:38:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-07-21 19:38:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 19:38:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions. [2020-07-21 19:38:53,627 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204 [2020-07-21 19:38:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:53,628 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 161 transitions. [2020-07-21 19:38:53,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:38:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions. [2020-07-21 19:38:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 19:38:53,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:53,631 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:53,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:53,847 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times [2020-07-21 19:38:53,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:53,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134830697] [2020-07-21 19:38:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:54,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:54,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-21 19:38:54,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 19:38:54,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-21 19:38:56,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134830697] [2020-07-21 19:38:56,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:56,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 19:38:56,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301824279] [2020-07-21 19:38:56,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 19:38:56,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 19:38:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:38:56,668 INFO L87 Difference]: Start difference. First operand 93 states and 161 transitions. Second operand 36 states. [2020-07-21 19:38:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:57,633 INFO L93 Difference]: Finished difference Result 226 states and 521 transitions. [2020-07-21 19:38:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 19:38:57,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-21 19:38:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:57,644 INFO L225 Difference]: With dead ends: 226 [2020-07-21 19:38:57,644 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 19:38:57,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 19:38:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 19:38:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2020-07-21 19:38:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-21 19:38:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2020-07-21 19:38:57,688 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 177 [2020-07-21 19:38:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:57,688 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2020-07-21 19:38:57,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 19:38:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2020-07-21 19:38:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-21 19:38:57,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:57,697 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 12, 12, 10, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:57,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:57,911 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1850132421, now seen corresponding path program 15 times [2020-07-21 19:38:57,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:57,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022234296] [2020-07-21 19:38:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:58,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:38:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 97 proven. 229 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2020-07-21 19:38:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:59,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 101 proven. 235 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2020-07-21 19:38:59,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022234296] [2020-07-21 19:38:59,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:59,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:38:59,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028068697] [2020-07-21 19:38:59,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:38:59,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:38:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:38:59,679 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 15 states. [2020-07-21 19:39:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:00,013 INFO L93 Difference]: Finished difference Result 205 states and 502 transitions. [2020-07-21 19:39:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:00,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 204 [2020-07-21 19:39:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:00,019 INFO L225 Difference]: With dead ends: 205 [2020-07-21 19:39:00,019 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 19:39:00,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 383 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:39:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 19:39:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-07-21 19:39:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 19:39:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 314 transitions. [2020-07-21 19:39:00,047 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 314 transitions. Word has length 204 [2020-07-21 19:39:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:00,047 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 314 transitions. [2020-07-21 19:39:00,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-07-21 19:39:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:00,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:00,053 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:00,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:00,257 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:00,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:00,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1674908912, now seen corresponding path program 16 times [2020-07-21 19:39:00,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:00,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006311423] [2020-07-21 19:39:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:00,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:39:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 124 proven. 130 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 19:39:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:01,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:01,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:01,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:01,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:01,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 125 proven. 133 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 19:39:01,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006311423] [2020-07-21 19:39:01,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:01,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:39:01,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433249983] [2020-07-21 19:39:01,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:39:01,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:39:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:39:01,760 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 15 states. [2020-07-21 19:39:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:02,139 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2020-07-21 19:39:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:02,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 19:39:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:02,144 INFO L225 Difference]: With dead ends: 206 [2020-07-21 19:39:02,144 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 19:39:02,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:39:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 19:39:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-07-21 19:39:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 19:39:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2020-07-21 19:39:02,177 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 189 [2020-07-21 19:39:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:02,178 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2020-07-21 19:39:02,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2020-07-21 19:39:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-21 19:39:02,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:02,187 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:02,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:02,402 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash -13750993, now seen corresponding path program 17 times [2020-07-21 19:39:02,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:02,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005402067] [2020-07-21 19:39:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:02,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:02,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:39:02,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 131 proven. 138 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-07-21 19:39:02,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:03,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 131 proven. 150 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-21 19:39:03,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005402067] [2020-07-21 19:39:03,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:03,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:39:03,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365502587] [2020-07-21 19:39:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:39:03,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:39:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:39:03,969 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand 15 states. [2020-07-21 19:39:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:04,300 INFO L93 Difference]: Finished difference Result 212 states and 472 transitions. [2020-07-21 19:39:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:04,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 179 [2020-07-21 19:39:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:04,306 INFO L225 Difference]: With dead ends: 212 [2020-07-21 19:39:04,306 INFO L226 Difference]: Without dead ends: 180 [2020-07-21 19:39:04,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 333 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:39:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-21 19:39:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 154. [2020-07-21 19:39:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 19:39:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 320 transitions. [2020-07-21 19:39:04,333 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 320 transitions. Word has length 179 [2020-07-21 19:39:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:04,334 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 320 transitions. [2020-07-21 19:39:04,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 320 transitions. [2020-07-21 19:39:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 19:39:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:04,339 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:04,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:04,555 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 128823812, now seen corresponding path program 18 times [2020-07-21 19:39:04,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:04,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742705817] [2020-07-21 19:39:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:04,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:04,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:39:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 204 proven. 33 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2020-07-21 19:39:04,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:05,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 204 proven. 40 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-07-21 19:39:05,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742705817] [2020-07-21 19:39:05,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:05,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 19:39:05,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42095640] [2020-07-21 19:39:05,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:39:05,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:39:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:39:05,857 INFO L87 Difference]: Start difference. First operand 154 states and 320 transitions. Second operand 13 states. [2020-07-21 19:39:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:06,082 INFO L93 Difference]: Finished difference Result 180 states and 367 transitions. [2020-07-21 19:39:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:39:06,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 190 [2020-07-21 19:39:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:06,087 INFO L225 Difference]: With dead ends: 180 [2020-07-21 19:39:06,087 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 19:39:06,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 359 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 19:39:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 154. [2020-07-21 19:39:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 19:39:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 320 transitions. [2020-07-21 19:39:06,123 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 320 transitions. Word has length 190 [2020-07-21 19:39:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:06,123 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 320 transitions. [2020-07-21 19:39:06,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:39:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 320 transitions. [2020-07-21 19:39:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 19:39:06,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:06,132 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:06,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:06,348 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1083167591, now seen corresponding path program 19 times [2020-07-21 19:39:06,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:06,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968826729] [2020-07-21 19:39:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:06,632 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:06,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:06,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:39:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 155 proven. 174 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2020-07-21 19:39:06,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:07,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:07,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 153 proven. 184 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-21 19:39:08,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968826729] [2020-07-21 19:39:08,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:08,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:39:08,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46995876] [2020-07-21 19:39:08,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:39:08,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:08,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:39:08,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:08,385 INFO L87 Difference]: Start difference. First operand 154 states and 320 transitions. Second operand 17 states. [2020-07-21 19:39:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:08,710 INFO L93 Difference]: Finished difference Result 198 states and 412 transitions. [2020-07-21 19:39:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:39:08,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 201 [2020-07-21 19:39:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:08,714 INFO L225 Difference]: With dead ends: 198 [2020-07-21 19:39:08,714 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 19:39:08,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 375 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:39:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 19:39:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2020-07-21 19:39:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 19:39:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 300 transitions. [2020-07-21 19:39:08,734 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 300 transitions. Word has length 201 [2020-07-21 19:39:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:08,734 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 300 transitions. [2020-07-21 19:39:08,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:39:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 300 transitions. [2020-07-21 19:39:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-21 19:39:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:08,744 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 11, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:08,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:08,959 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash 519968671, now seen corresponding path program 20 times [2020-07-21 19:39:08,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:08,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315912051] [2020-07-21 19:39:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:09,197 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:09,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:39:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 234 proven. 80 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2020-07-21 19:39:09,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:10,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 236 proven. 88 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-07-21 19:39:10,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315912051] [2020-07-21 19:39:10,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:10,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:39:10,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091855307] [2020-07-21 19:39:10,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:39:10,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:39:10,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:39:10,752 INFO L87 Difference]: Start difference. First operand 149 states and 300 transitions. Second operand 15 states. [2020-07-21 19:39:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:11,045 INFO L93 Difference]: Finished difference Result 182 states and 362 transitions. [2020-07-21 19:39:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:11,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 202 [2020-07-21 19:39:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:11,049 INFO L225 Difference]: With dead ends: 182 [2020-07-21 19:39:11,049 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 19:39:11,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 379 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:39:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 19:39:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 146. [2020-07-21 19:39:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 19:39:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 297 transitions. [2020-07-21 19:39:11,075 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 297 transitions. Word has length 202 [2020-07-21 19:39:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:11,075 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 297 transitions. [2020-07-21 19:39:11,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 297 transitions. [2020-07-21 19:39:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 19:39:11,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:11,081 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:11,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:11,294 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:11,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1448884811, now seen corresponding path program 21 times [2020-07-21 19:39:11,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:11,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619375308] [2020-07-21 19:39:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:11,539 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:11,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:39:11,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 108 proven. 221 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2020-07-21 19:39:11,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:12,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:12,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:12,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:13,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:13,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:13,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:13,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 108 proven. 229 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-21 19:39:13,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619375308] [2020-07-21 19:39:13,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:13,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:39:13,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288494665] [2020-07-21 19:39:13,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:39:13,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:39:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:13,366 INFO L87 Difference]: Start difference. First operand 146 states and 297 transitions. Second operand 17 states. [2020-07-21 19:39:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:13,826 INFO L93 Difference]: Finished difference Result 197 states and 403 transitions. [2020-07-21 19:39:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:39:13,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 201 [2020-07-21 19:39:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:13,831 INFO L225 Difference]: With dead ends: 197 [2020-07-21 19:39:13,831 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 19:39:13,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 375 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:39:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 19:39:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-07-21 19:39:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 19:39:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2020-07-21 19:39:13,862 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 201 [2020-07-21 19:39:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:13,863 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2020-07-21 19:39:13,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:39:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2020-07-21 19:39:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:13,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:13,868 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:14,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:14,083 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1156996270, now seen corresponding path program 22 times [2020-07-21 19:39:14,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:14,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599125269] [2020-07-21 19:39:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:14,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:14,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:39:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 234 proven. 69 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 19:39:14,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:15,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:15,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:16,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 232 proven. 79 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 19:39:16,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599125269] [2020-07-21 19:39:16,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:16,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:39:16,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973943382] [2020-07-21 19:39:16,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:39:16,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:16,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:39:16,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:16,279 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand 17 states. [2020-07-21 19:39:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:16,651 INFO L93 Difference]: Finished difference Result 180 states and 348 transitions. [2020-07-21 19:39:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:39:16,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 19:39:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:16,654 INFO L225 Difference]: With dead ends: 180 [2020-07-21 19:39:16,654 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 19:39:16,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:39:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 19:39:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-07-21 19:39:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 19:39:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 254 transitions. [2020-07-21 19:39:16,677 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 254 transitions. Word has length 189 [2020-07-21 19:39:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:16,678 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 254 transitions. [2020-07-21 19:39:16,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:39:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 254 transitions. [2020-07-21 19:39:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:16,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:16,682 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:16,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:16,895 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash -140375518, now seen corresponding path program 23 times [2020-07-21 19:39:16,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:16,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437733682] [2020-07-21 19:39:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:17,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:39:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 211 proven. 43 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2020-07-21 19:39:17,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:17,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 19:39:18,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437733682] [2020-07-21 19:39:18,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:18,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:39:18,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568322803] [2020-07-21 19:39:18,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:39:18,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:39:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:39:18,595 INFO L87 Difference]: Start difference. First operand 136 states and 254 transitions. Second operand 15 states. [2020-07-21 19:39:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:18,932 INFO L93 Difference]: Finished difference Result 158 states and 286 transitions. [2020-07-21 19:39:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:18,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 19:39:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:18,935 INFO L225 Difference]: With dead ends: 158 [2020-07-21 19:39:18,936 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 19:39:18,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:39:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 19:39:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-07-21 19:39:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-21 19:39:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 242 transitions. [2020-07-21 19:39:18,960 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 242 transitions. Word has length 189 [2020-07-21 19:39:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:18,961 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 242 transitions. [2020-07-21 19:39:18,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 242 transitions. [2020-07-21 19:39:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:18,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:18,965 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:19,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:19,179 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1838391522, now seen corresponding path program 24 times [2020-07-21 19:39:19,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:19,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077938883] [2020-07-21 19:39:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:19,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:19,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:19,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 19:39:19,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 198 proven. 54 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-07-21 19:39:19,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:20,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 197 proven. 61 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 19:39:20,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077938883] [2020-07-21 19:39:20,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:20,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 19:39:20,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694876768] [2020-07-21 19:39:20,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:39:20,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:20,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:39:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:39:20,805 INFO L87 Difference]: Start difference. First operand 133 states and 242 transitions. Second operand 15 states. [2020-07-21 19:39:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:21,205 INFO L93 Difference]: Finished difference Result 162 states and 300 transitions. [2020-07-21 19:39:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:39:21,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 189 [2020-07-21 19:39:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:21,209 INFO L225 Difference]: With dead ends: 162 [2020-07-21 19:39:21,209 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 19:39:21,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:39:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 19:39:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2020-07-21 19:39:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 19:39:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 192 transitions. [2020-07-21 19:39:21,248 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 192 transitions. Word has length 189 [2020-07-21 19:39:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:21,249 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 192 transitions. [2020-07-21 19:39:21,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:39:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 192 transitions. [2020-07-21 19:39:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 19:39:21,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:21,254 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:21,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:21,468 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2096855727, now seen corresponding path program 25 times [2020-07-21 19:39:21,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:21,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951019964] [2020-07-21 19:39:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:21,755 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:21,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:39:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 69 proven. 239 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2020-07-21 19:39:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:23,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 73 proven. 251 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-07-21 19:39:23,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951019964] [2020-07-21 19:39:23,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:23,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:39:23,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112799455] [2020-07-21 19:39:23,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:39:23,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:39:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:23,873 INFO L87 Difference]: Start difference. First operand 107 states and 192 transitions. Second operand 17 states. [2020-07-21 19:39:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:24,400 INFO L93 Difference]: Finished difference Result 168 states and 323 transitions. [2020-07-21 19:39:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:39:24,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 178 [2020-07-21 19:39:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:24,405 INFO L225 Difference]: With dead ends: 168 [2020-07-21 19:39:24,405 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 19:39:24,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 327 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:39:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 19:39:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-21 19:39:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 19:39:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 148 transitions. [2020-07-21 19:39:24,424 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 148 transitions. Word has length 178 [2020-07-21 19:39:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:24,424 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 148 transitions. [2020-07-21 19:39:24,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:39:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 148 transitions. [2020-07-21 19:39:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:24,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:24,430 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:24,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:24,647 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1148569106, now seen corresponding path program 26 times [2020-07-21 19:39:24,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:24,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37649558] [2020-07-21 19:39:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:24,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:24,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:39:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 212 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-07-21 19:39:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:26,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:26,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:26,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:26,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:26,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 91 proven. 220 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2020-07-21 19:39:26,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37649558] [2020-07-21 19:39:26,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:26,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:39:26,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521855440] [2020-07-21 19:39:26,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:39:26,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:39:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:39:26,858 INFO L87 Difference]: Start difference. First operand 104 states and 148 transitions. Second operand 17 states. [2020-07-21 19:39:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:27,330 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-07-21 19:39:27,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:39:27,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 189 [2020-07-21 19:39:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:27,334 INFO L225 Difference]: With dead ends: 152 [2020-07-21 19:39:27,334 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 19:39:27,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:39:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 19:39:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-07-21 19:39:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 19:39:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-21 19:39:27,347 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 189 [2020-07-21 19:39:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:27,347 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-21 19:39:27,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:39:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-21 19:39:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 19:39:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:39:27,350 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:39:27,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:27,567 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:39:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:39:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 27 times [2020-07-21 19:39:27,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:39:27,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671273157] [2020-07-21 19:39:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:27,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:39:27,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:39:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:39:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:39:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 89 proven. 260 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-07-21 19:39:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:39:29,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:39:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 87 proven. 276 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2020-07-21 19:39:30,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671273157] [2020-07-21 19:39:30,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:39:30,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:39:30,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086308095] [2020-07-21 19:39:30,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:39:30,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:39:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:39:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:39:30,738 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 19 states. [2020-07-21 19:39:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:39:31,181 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-07-21 19:39:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:39:31,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-07-21 19:39:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:39:31,184 INFO L225 Difference]: With dead ends: 137 [2020-07-21 19:39:31,184 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:39:31,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 347 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:39:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:39:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:39:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:39:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:39:31,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2020-07-21 19:39:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:39:31,189 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:39:31,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:39:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:39:31,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:39:31,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:39:31,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:39:32,246 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 19:39:32,382 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 29 [2020-07-21 19:39:32,721 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 19:39:32,847 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2020-07-21 19:39:32,950 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2020-07-21 19:39:33,073 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2020-07-21 19:39:33,217 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 63 [2020-07-21 19:39:33,468 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 43 [2020-07-21 19:39:33,819 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:34,309 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:34,427 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 36 [2020-07-21 19:39:34,660 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 43 [2020-07-21 19:39:34,900 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 43 [2020-07-21 19:39:35,013 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 54 [2020-07-21 19:39:35,161 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 43 [2020-07-21 19:39:35,332 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 43 [2020-07-21 19:39:35,539 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:35,669 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 43 [2020-07-21 19:39:35,914 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 19:39:36,087 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:36,245 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 43 [2020-07-21 19:39:36,424 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 59 [2020-07-21 19:39:36,553 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 19:39:36,663 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 43 [2020-07-21 19:39:36,934 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:37,138 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 45 [2020-07-21 19:39:37,244 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 58 [2020-07-21 19:39:37,405 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 60 [2020-07-21 19:39:37,521 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 58 [2020-07-21 19:39:37,896 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 59 [2020-07-21 19:39:38,082 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 50 [2020-07-21 19:39:38,364 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:38,647 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:38,943 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:39,092 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 45 [2020-07-21 19:39:39,410 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:39,519 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 45 [2020-07-21 19:39:39,651 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 75 [2020-07-21 19:39:39,765 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 45 [2020-07-21 19:39:39,929 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 57 [2020-07-21 19:39:40,246 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:40,491 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 19:39:40,786 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:41,045 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 79 [2020-07-21 19:39:41,213 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 57 [2020-07-21 19:39:41,350 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 45 [2020-07-21 19:39:41,503 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 45 [2020-07-21 19:39:41,658 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 50 [2020-07-21 19:39:41,941 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:42,051 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 45 [2020-07-21 19:39:42,168 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 45 [2020-07-21 19:39:42,432 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 19:39:42,738 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:42,980 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 19:39:43,141 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 57 [2020-07-21 19:39:43,390 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 72 [2020-07-21 19:39:43,680 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 81 [2020-07-21 19:39:43,862 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 57 [2020-07-21 19:39:44,116 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 79 [2020-07-21 19:39:44,227 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 45 [2020-07-21 19:39:45,317 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 116 DAG size of output: 30 [2020-07-21 19:39:46,083 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 30 [2020-07-21 19:39:46,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:39:46,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:39:46,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:39:46,089 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:39:46,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:39:46,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:39:46,089 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 19:39:46,090 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 19:39:46,091 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 19:39:46,091 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 19:39:46,091 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (let ((.cse0 (= 1 |fibo2_#t~ret2|))) (or (and (= 3 |fibo2_#t~ret2|) (<= 5 |fibo2_#in~n|)) (and (<= 4 |fibo2_#in~n|) (<= |fibo2_#in~n| 4) (= 2 |fibo2_#t~ret2|)) (and (<= |fibo2_#in~n| 2) .cse0 (<= 2 |fibo2_#in~n|)) (<= 6 |fibo2_#in~n|) (and (<= 3 |fibo2_#in~n|) .cse0 (<= |fibo2_#in~n| 3)))) (<= |fibo2_#in~n| fibo2_~n)) [2020-07-21 19:39:46,091 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 19:39:46,091 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 19:39:46,091 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 19:39:46,091 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:39:46,092 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 19:39:46,092 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 19:39:46,092 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 19:39:46,092 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 19:39:46,092 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse2 (= 1 |fibo1_#t~ret0|)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 (= 2 |fibo1_#t~ret0|) .cse1 (<= 4 |fibo1_#in~n|)) (and (<= 5 |fibo1_#in~n|) .cse0 .cse1) (and .cse0 (<= 3 |fibo1_#in~n|) .cse2 .cse1 (<= |fibo1_#in~n| 3)) (and (<= 2 |fibo1_#in~n|) .cse0 (<= |fibo1_#in~n| 2) .cse2 .cse1))) (or (= 5 |fibo1_#t~ret0|) (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5))) [2020-07-21 19:39:46,092 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:39:46,092 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 19:39:46,092 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 19:39:46,093 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 19:39:46,093 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 19:39:46,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:39:46 BoogieIcfgContainer [2020-07-21 19:39:46,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:39:46,101 INFO L168 Benchmark]: Toolchain (without parser) took 94433.45 ms. Allocated memory was 136.8 MB in the beginning and 949.5 MB in the end (delta: 812.6 MB). Free memory was 99.7 MB in the beginning and 340.9 MB in the end (delta: -241.2 MB). Peak memory consumption was 842.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,102 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.15 ms. Allocated memory is still 136.8 MB. Free memory was 99.3 MB in the beginning and 89.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,102 INFO L168 Benchmark]: Boogie Preprocessor took 149.63 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 89.7 MB in the beginning and 181.0 MB in the end (delta: -91.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,105 INFO L168 Benchmark]: RCFGBuilder took 315.51 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 167.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,106 INFO L168 Benchmark]: TraceAbstraction took 93593.40 ms. Allocated memory was 201.9 MB in the beginning and 949.5 MB in the end (delta: 747.6 MB). Free memory was 167.1 MB in the beginning and 340.9 MB in the end (delta: -173.9 MB). Peak memory consumption was 844.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:39:46,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.15 ms. Allocated memory is still 136.8 MB. Free memory was 99.3 MB in the beginning and 89.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.63 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 89.7 MB in the beginning and 181.0 MB in the end (delta: -91.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.51 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 167.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 93593.40 ms. Allocated memory was 201.9 MB in the beginning and 949.5 MB in the end (delta: 747.6 MB). Free memory was 167.1 MB in the beginning and 340.9 MB in the end (delta: -173.9 MB). Peak memory consumption was 844.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 78.8s, OverallIterations: 40, TraceHistogramMax: 18, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1184 SDtfs, 1420 SDslu, 8492 SDs, 0 SdLazy, 7631 SolverSat, 1081 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11634 GetRequests, 10587 SyntacticMatches, 364 SemanticMatches, 683 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 40 MinimizatonAttempts, 717 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 248 PreInvPairs, 5875 NumberOfFragments, 148 HoareAnnotationTreeSize, 248 FomulaSimplifications, 878484726 FormulaSimplificationTreeSizeReduction, 12.8s HoareSimplificationTime, 11 FomulaSimplificationsInter, 18430 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 49.9s InterpolantComputationTime, 5753 NumberOfCodeBlocks, 5740 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 11401 ConstructedInterpolants, 0 QuantifiedInterpolants, 3167031 SizeOfPredicates, 208 NumberOfNonLiveVariables, 12802 ConjunctsInSsa, 527 ConjunctsInUnsatCore, 78 InterpolantComputations, 2 PerfectInterpolantSequences, 41185/49612 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...