/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:28:15,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:28:15,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:28:15,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:28:15,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:28:15,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:28:15,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:28:15,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:28:15,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:28:15,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:28:15,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:28:15,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:28:15,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:28:15,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:28:15,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:28:15,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:28:15,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:28:15,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:28:15,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:28:15,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:28:15,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:28:15,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:28:15,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:28:15,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:28:15,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:28:15,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:28:15,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:28:15,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:28:15,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:28:15,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:28:15,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:28:15,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:28:15,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:28:15,276 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:28:15,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:28:15,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:28:15,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:28:15,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:28:15,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:28:15,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:28:15,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:28:15,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:28:15,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:28:15,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:28:15,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:28:15,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:28:15,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:28:15,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:28:15,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:28:15,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:28:15,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:15,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:28:15,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:28:15,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:28:15,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:28:15,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:15,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:28:15,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:28:15,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:28:15,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:28:15,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:28:15,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:28:15,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:28:15,572 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:28:15,572 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 16:28:15,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbfe0607b/72f51f76c79544b5b5eacc8f77140588/FLAG217725e03 [2020-07-20 16:28:16,070 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:28:16,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 16:28:16,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbfe0607b/72f51f76c79544b5b5eacc8f77140588/FLAG217725e03 [2020-07-20 16:28:16,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbfe0607b/72f51f76c79544b5b5eacc8f77140588 [2020-07-20 16:28:16,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:28:16,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:28:16,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:16,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:28:16,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:28:16,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662a784d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16, skipping insertion in model container [2020-07-20 16:28:16,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:28:16,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:28:16,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:16,702 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:28:16,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:28:16,731 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:28:16,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16 WrapperNode [2020-07-20 16:28:16,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:28:16,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:28:16,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:28:16,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:28:16,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... [2020-07-20 16:28:16,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:28:16,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:28:16,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:28:16,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:28:16,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:28:16,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:28:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:28:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 16:28:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:28:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:28:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:28:16,922 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 16:28:16,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:28:16,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:28:16,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:28:17,108 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:28:17,108 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:28:17,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:17 BoogieIcfgContainer [2020-07-20 16:28:17,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:28:17,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:28:17,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:28:17,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:28:17,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:16" (1/3) ... [2020-07-20 16:28:17,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586947ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:17, skipping insertion in model container [2020-07-20 16:28:17,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:16" (2/3) ... [2020-07-20 16:28:17,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586947ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:17, skipping insertion in model container [2020-07-20 16:28:17,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:17" (3/3) ... [2020-07-20 16:28:17,120 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-20 16:28:17,130 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:28:17,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:28:17,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:28:17,173 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:28:17,173 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:28:17,173 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:28:17,173 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:28:17,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:28:17,174 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:28:17,174 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:28:17,174 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:28:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 16:28:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 16:28:17,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:17,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:17,199 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 16:28:17,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:17,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318842598] [2020-07-20 16:28:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:28:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:28:17,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:28:17,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318842598] [2020-07-20 16:28:17,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:28:17,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:28:17,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285273189] [2020-07-20 16:28:17,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:28:17,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:28:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:28:17,432 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-20 16:28:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:17,570 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-20 16:28:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:28:17,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 16:28:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:17,586 INFO L225 Difference]: With dead ends: 42 [2020-07-20 16:28:17,586 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 16:28:17,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:28:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 16:28:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 16:28:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 16:28:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-20 16:28:17,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-20 16:28:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:17,646 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-20 16:28:17,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:28:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-20 16:28:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:28:17,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:17,650 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] [2020-07-20 16:28:17,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,865 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 16:28:17,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:17,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319513552] [2020-07-20 16:28:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:17,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:28:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 16:28:17,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:18,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:18,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:28:18,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319513552] [2020-07-20 16:28:18,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:18,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 16:28:18,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173504035] [2020-07-20 16:28:18,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:18,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:18,186 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-20 16:28:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:18,322 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-20 16:28:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:28:18,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 16:28:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:18,325 INFO L225 Difference]: With dead ends: 38 [2020-07-20 16:28:18,326 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 16:28:18,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:28:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 16:28:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 16:28:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 16:28:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-20 16:28:18,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-20 16:28:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:18,340 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-20 16:28:18,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-20 16:28:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 16:28:18,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:18,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:18,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:18,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-20 16:28:18,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:18,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100353388] [2020-07-20 16:28:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:18,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:18,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:18,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:28:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:18,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 16:28:18,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100353388] [2020-07-20 16:28:18,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:18,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 16:28:18,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667026096] [2020-07-20 16:28:18,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:28:18,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:28:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:28:18,799 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-20 16:28:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:18,919 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-20 16:28:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:18,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 16:28:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:18,924 INFO L225 Difference]: With dead ends: 87 [2020-07-20 16:28:18,924 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 16:28:18,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:28:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 16:28:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 16:28:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 16:28:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-20 16:28:18,948 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-20 16:28:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:18,949 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-20 16:28:18,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:28:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-20 16:28:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 16:28:18,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:18,957 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:19,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:19,172 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-20 16:28:19,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:19,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929251754] [2020-07-20 16:28:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:19,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:28:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 16:28:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 139 proven. 127 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-07-20 16:28:19,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:19,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 143 proven. 141 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-20 16:28:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929251754] [2020-07-20 16:28:20,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:20,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 16:28:20,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246148451] [2020-07-20 16:28:20,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:28:20,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:28:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:28:20,410 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 12 states. [2020-07-20 16:28:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:20,655 INFO L93 Difference]: Finished difference Result 128 states and 498 transitions. [2020-07-20 16:28:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 16:28:20,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-07-20 16:28:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:20,665 INFO L225 Difference]: With dead ends: 128 [2020-07-20 16:28:20,665 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 16:28:20,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:28:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 16:28:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 16:28:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 16:28:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-20 16:28:20,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 122 [2020-07-20 16:28:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:20,699 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-20 16:28:20,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:28:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-20 16:28:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 16:28:20,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:20,704 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:20,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:20,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:20,920 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-20 16:28:20,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:20,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001027159] [2020-07-20 16:28:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:20,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:20,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 16:28:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-20 16:28:21,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 16:28:22,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001027159] [2020-07-20 16:28:22,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:22,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-20 16:28:22,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389174464] [2020-07-20 16:28:22,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 16:28:22,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 16:28:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 16:28:22,757 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 24 states. [2020-07-20 16:28:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:23,090 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-07-20 16:28:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 16:28:23,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-20 16:28:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:23,095 INFO L225 Difference]: With dead ends: 97 [2020-07-20 16:28:23,095 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 16:28:23,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:28:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 16:28:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-20 16:28:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 16:28:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-20 16:28:23,105 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 82 [2020-07-20 16:28:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:23,106 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-20 16:28:23,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 16:28:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-20 16:28:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-20 16:28:23,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:23,112 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:23,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,326 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 3 times [2020-07-20 16:28:23,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:23,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012342903] [2020-07-20 16:28:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:23,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 16:28:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-20 16:28:23,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:25,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:25,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-20 16:28:28,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012342903] [2020-07-20 16:28:28,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:28,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 35 [2020-07-20 16:28:28,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723983636] [2020-07-20 16:28:28,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:28:28,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:28:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:28:28,115 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 35 states. [2020-07-20 16:28:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:29,336 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-07-20 16:28:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 16:28:29,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-07-20 16:28:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:29,339 INFO L225 Difference]: With dead ends: 126 [2020-07-20 16:28:29,339 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 16:28:29,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2020-07-20 16:28:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 16:28:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-20 16:28:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:28:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-20 16:28:29,359 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 147 [2020-07-20 16:28:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:29,360 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-20 16:28:29,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:28:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-20 16:28:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-20 16:28:29,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:29,363 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:29,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:29,575 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 4 times [2020-07-20 16:28:29,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:29,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395068115] [2020-07-20 16:28:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:29,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 16:28:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-20 16:28:29,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:31,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:31,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:31,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:31,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-20 16:28:32,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395068115] [2020-07-20 16:28:32,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:32,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-20 16:28:32,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47719894] [2020-07-20 16:28:32,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:28:32,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:28:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:28:32,006 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-07-20 16:28:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:32,510 INFO L93 Difference]: Finished difference Result 119 states and 153 transitions. [2020-07-20 16:28:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 16:28:32,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-07-20 16:28:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:32,517 INFO L225 Difference]: With dead ends: 119 [2020-07-20 16:28:32,517 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 16:28:32,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 16:28:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 16:28:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-20 16:28:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 16:28:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-20 16:28:32,532 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 147 [2020-07-20 16:28:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:32,533 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-20 16:28:32,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:28:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-20 16:28:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-20 16:28:32,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:32,536 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:32,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:32,743 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-20 16:28:32,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:32,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192610051] [2020-07-20 16:28:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:32,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:32,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 16:28:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-20 16:28:33,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:34,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:34,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-20 16:28:37,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192610051] [2020-07-20 16:28:37,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:37,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-20 16:28:37,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60781119] [2020-07-20 16:28:37,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 16:28:37,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:37,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 16:28:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 16:28:37,924 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 33 states. [2020-07-20 16:28:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:39,102 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-07-20 16:28:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 16:28:39,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-20 16:28:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:39,108 INFO L225 Difference]: With dead ends: 137 [2020-07-20 16:28:39,108 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 16:28:39,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 263 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 16:28:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 16:28:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-20 16:28:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 16:28:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-20 16:28:39,134 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-20 16:28:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:39,134 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-20 16:28:39,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 16:28:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-20 16:28:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 16:28:39,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:39,138 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:39,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:39,353 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-20 16:28:39,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:39,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447993537] [2020-07-20 16:28:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:39,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:28:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 16:28:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 16:28:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:41,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:41,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:42,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:42,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:28:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-20 16:28:45,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447993537] [2020-07-20 16:28:45,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:45,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-20 16:28:45,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491553335] [2020-07-20 16:28:45,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 16:28:45,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 16:28:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-20 16:28:45,133 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-20 16:28:46,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:28:46,337 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-20 16:28:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 16:28:46,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-20 16:28:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:28:46,340 INFO L225 Difference]: With dead ends: 152 [2020-07-20 16:28:46,341 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 16:28:46,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 285 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 16:28:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 16:28:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-20 16:28:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 16:28:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-20 16:28:46,375 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-20 16:28:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:28:46,376 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-20 16:28:46,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 16:28:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-20 16:28:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-20 16:28:46,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:28:46,383 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:28:46,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:46,598 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:28:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:28:46,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-20 16:28:46,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:28:46,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686253743] [2020-07-20 16:28:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:28:46,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:28:46,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:28:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 16:28:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:28:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-20 16:28:47,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:28:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-20 16:28:49,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686253743] [2020-07-20 16:28:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:28:49,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-20 16:28:49,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806296032] [2020-07-20 16:28:49,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:28:49,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:28:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:28:49,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 16:28:49,535 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-20 16:29:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:01,423 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-20 16:29:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-20 16:29:01,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-20 16:29:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:01,429 INFO L225 Difference]: With dead ends: 323 [2020-07-20 16:29:01,429 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 16:29:01,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 16:29:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 16:29:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-20 16:29:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 16:29:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-20 16:29:01,457 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-20 16:29:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:01,457 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-20 16:29:01,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:29:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-20 16:29:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 16:29:01,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:01,461 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:01,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:01,676 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 8 times [2020-07-20 16:29:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:01,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784072178] [2020-07-20 16:29:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:01,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:29:01,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:01,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 16:29:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-20 16:29:02,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:05,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:05,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:06,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-07-20 16:29:09,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784072178] [2020-07-20 16:29:09,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:09,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-20 16:29:09,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202053883] [2020-07-20 16:29:09,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 16:29:09,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:09,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 16:29:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:29:09,505 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-20 16:29:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:11,005 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-20 16:29:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 16:29:11,008 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-20 16:29:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:11,013 INFO L225 Difference]: With dead ends: 238 [2020-07-20 16:29:11,013 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 16:29:11,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 16:29:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 16:29:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-20 16:29:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 16:29:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-20 16:29:11,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-20 16:29:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:11,044 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-20 16:29:11,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 16:29:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-20 16:29:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-20 16:29:11,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:11,050 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:11,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:11,265 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 9 times [2020-07-20 16:29:11,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:11,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877535525] [2020-07-20 16:29:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:11,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:11,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-20 16:29:11,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1296 proven. 226 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2020-07-20 16:29:11,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 224 proven. 778 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2020-07-20 16:29:13,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877535525] [2020-07-20 16:29:13,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:13,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 21 [2020-07-20 16:29:13,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552022425] [2020-07-20 16:29:13,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:29:13,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:13,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:29:13,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-07-20 16:29:13,580 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 21 states. [2020-07-20 16:29:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:14,810 INFO L93 Difference]: Finished difference Result 200 states and 289 transitions. [2020-07-20 16:29:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 16:29:14,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 212 [2020-07-20 16:29:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:14,814 INFO L225 Difference]: With dead ends: 200 [2020-07-20 16:29:14,814 INFO L226 Difference]: Without dead ends: 115 [2020-07-20 16:29:14,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 16:29:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-20 16:29:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-07-20 16:29:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 16:29:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2020-07-20 16:29:14,828 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 212 [2020-07-20 16:29:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:14,828 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2020-07-20 16:29:14,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:29:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2020-07-20 16:29:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-20 16:29:14,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:29:14,835 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:29:15,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:15,049 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:29:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:29:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 10 times [2020-07-20 16:29:15,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:29:15,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042514804] [2020-07-20 16:29:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:15,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:29:15,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:29:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 16:29:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:29:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-20 16:29:15,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:29:16,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:29:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2020-07-20 16:29:16,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042514804] [2020-07-20 16:29:16,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:29:16,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-20 16:29:16,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102876911] [2020-07-20 16:29:16,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:29:16,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:29:16,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:29:16,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:29:16,979 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand 12 states. [2020-07-20 16:29:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:29:17,145 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-07-20 16:29:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 16:29:17,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-20 16:29:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:29:17,147 INFO L225 Difference]: With dead ends: 107 [2020-07-20 16:29:17,147 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 16:29:17,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:29:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 16:29:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 16:29:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 16:29:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 16:29:17,150 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-20 16:29:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:29:17,150 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 16:29:17,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:29:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 16:29:17,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 16:29:17,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:29:17,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 16:29:18,134 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-20 16:29:18,448 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 127 [2020-07-20 16:29:19,475 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 114 [2020-07-20 16:29:20,582 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 126 [2020-07-20 16:29:23,350 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 12 [2020-07-20 16:29:27,976 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 353 DAG size of output: 66 [2020-07-20 16:29:28,275 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 11 [2020-07-20 16:29:28,522 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 1 [2020-07-20 16:29:28,525 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 16:29:28,525 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:29:28,525 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 16:29:28,525 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 16:29:28,526 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 16:29:28,526 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 16:29:28,526 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:29:28,526 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 16:29:28,526 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (not (= 0 |ackermann_#in~n|)) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 16:29:28,526 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 16:29:28,527 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|) (= 0 |ackermann_#in~n|)) [2020-07-20 16:29:28,527 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse17 (<= |ackermann_#in~m| 0)) (.cse7 (<= |ackermann_#in~n| ackermann_~n)) (.cse4 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse1 (= 3 |ackermann_#t~ret1|)) (.cse10 (and .cse0 .cse17 .cse7 (<= 0 |ackermann_#in~m|) .cse4)) (.cse14 (and .cse0 (<= 3 |ackermann_#in~m|) .cse7 .cse4)) (.cse13 (< |ackermann_#in~n| 2)) (.cse6 (<= 2 |ackermann_#in~m|)) (.cse16 (= 2 |ackermann_#t~ret1|))) (and (let ((.cse9 (= 5 |ackermann_#t~ret1|)) (.cse8 (<= 5 |ackermann_#t~ret1|)) (.cse11 (<= 3 |ackermann_#in~n|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= |ackermann_#in~m| 1)) (.cse5 (<= 1 |ackermann_#in~m|)) (.cse12 (<= 4 |ackermann_#t~ret1|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (<= |ackermann_#in~n| 2) .cse5) (and .cse0 .cse6 .cse2 .cse7 .cse8 .cse4 (not (= 2 |ackermann_#in~n|))) (and .cse0 .cse6 .cse2 .cse7 .cse8 .cse9 .cse4) .cse10 (and (<= |ackermann_#in~n| 4) .cse0 .cse2 .cse7 .cse9 .cse3 .cse4 .cse11 .cse5 .cse12 (not (= 3 |ackermann_#in~n|))) (and .cse0 (<= 3 |ackermann_#t~ret1|) .cse6 .cse2 .cse13 .cse4) .cse14 (and .cse0 .cse2 .cse13 .cse3 .cse4 .cse5) (and (<= 6 |ackermann_#in~n|) .cse0 .cse2 .cse7 .cse8 .cse3 .cse4 .cse5 .cse12) (and .cse0 .cse2 .cse7 .cse3 .cse4 .cse11 .cse5 (<= |ackermann_#in~n| 3) .cse12 (= 4 |ackermann_#t~ret1|)) (and .cse0 .cse2 (<= 5 |ackermann_#in~n|) .cse7 (= 6 |ackermann_#t~ret1|) .cse3 .cse4 .cse5 .cse12))) (let ((.cse15 (<= 1 |ackermann_#in~n|))) (or (and .cse1 .cse15) .cse10 (<= 2 |ackermann_#in~n|) (and .cse16 .cse15) .cse14)) (or (not .cse13) .cse6 .cse17 .cse16)))) [2020-07-20 16:29:28,527 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 16:29:28,528 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-20 16:29:28,529 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 16:29:28,529 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-20 16:29:28,530 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 16:29:28,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:29:28 BoogieIcfgContainer [2020-07-20 16:29:28,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:29:28,537 INFO L168 Benchmark]: Toolchain (without parser) took 72056.74 ms. Allocated memory was 136.8 MB in the beginning and 652.7 MB in the end (delta: 515.9 MB). Free memory was 101.8 MB in the beginning and 476.5 MB in the end (delta: -374.6 MB). Peak memory consumption was 543.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,537 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.23 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,538 INFO L168 Benchmark]: Boogie Preprocessor took 26.78 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,539 INFO L168 Benchmark]: RCFGBuilder took 352.72 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.4 MB in the beginning and 167.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,540 INFO L168 Benchmark]: TraceAbstraction took 71421.89 ms. Allocated memory was 201.3 MB in the beginning and 652.7 MB in the end (delta: 451.4 MB). Free memory was 167.2 MB in the beginning and 476.5 MB in the end (delta: -309.2 MB). Peak memory consumption was 544.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:29:28,543 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.23 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.78 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.72 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.4 MB in the beginning and 167.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 71421.89 ms. Allocated memory was 201.3 MB in the beginning and 652.7 MB in the end (delta: 451.4 MB). Free memory was 167.2 MB in the beginning and 476.5 MB in the end (delta: -309.2 MB). Peak memory consumption was 544.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60.1s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 420 SDtfs, 644 SDslu, 2674 SDs, 0 SdLazy, 9620 SolverSat, 1929 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3842 GetRequests, 3120 SyntacticMatches, 160 SemanticMatches, 562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11489 ImplicationChecksByTransitivity, 15.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 172 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 653 PreInvPairs, 6269 NumberOfFragments, 352 HoareAnnotationTreeSize, 653 FomulaSimplifications, 1067972 FormulaSimplificationTreeSizeReduction, 5.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 162443 FormulaSimplificationTreeSizeReductionInter, 5.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 34.7s InterpolantComputationTime, 1778 NumberOfCodeBlocks, 1527 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 3516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1167557 SizeOfPredicates, 103 NumberOfNonLiveVariables, 4905 ConjunctsInSsa, 344 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26230/32304 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...