/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:15:42,900 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 19:15:42,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:15:42,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:15:42,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:15:42,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:15:42,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:15:42,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:15:42,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:15:42,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:15:42,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:15:42,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:15:42,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:15:42,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:15:42,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:15:42,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:15:42,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:15:43,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:15:43,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:15:43,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:15:43,005 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:15:43,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:15:43,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:15:43,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:15:43,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:15:43,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:15:43,007 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:15:43,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:15:43,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:15:43,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:15:43,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:15:43,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:15:43,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:43,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:15:43,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:15:43,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:15:43,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:15:43,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:43,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:15:43,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:15:43,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:15:43,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:15:43,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:15:43,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:15:43,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:15:43,315 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:15:43,316 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 19:15:43,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7cbb9fd/92a962d14b2f412ab7de034c5c366d74/FLAG2f8b46c71 [2020-07-21 19:15:43,818 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:15:43,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-21 19:15:43,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7cbb9fd/92a962d14b2f412ab7de034c5c366d74/FLAG2f8b46c71 [2020-07-21 19:15:44,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7cbb9fd/92a962d14b2f412ab7de034c5c366d74 [2020-07-21 19:15:44,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:15:44,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:15:44,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:44,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:15:44,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:15:44,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2af008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44, skipping insertion in model container [2020-07-21 19:15:44,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:15:44,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:15:44,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:44,418 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:15:44,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:44,448 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:15:44,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44 WrapperNode [2020-07-21 19:15:44,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:44,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:15:44,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:15:44,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:15:44,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... [2020-07-21 19:15:44,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:15:44,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:15:44,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:15:44,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:15:44,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:15:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:15:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-21 19:15:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:15:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:15:44,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:15:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-21 19:15:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:15:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:15:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:15:44,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:15:44,805 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:15:44,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:44 BoogieIcfgContainer [2020-07-21 19:15:44,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:15:44,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:15:44,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:15:44,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:15:44,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:15:44" (1/3) ... [2020-07-21 19:15:44,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165ba2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:44, skipping insertion in model container [2020-07-21 19:15:44,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:44" (2/3) ... [2020-07-21 19:15:44,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165ba2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:44, skipping insertion in model container [2020-07-21 19:15:44,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:44" (3/3) ... [2020-07-21 19:15:44,817 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-21 19:15:44,828 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:15:44,835 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:15:44,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:15:44,878 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:15:44,879 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:15:44,879 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:15:44,879 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:15:44,880 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:15:44,880 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:15:44,880 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:15:44,880 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:15:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 19:15:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 19:15:44,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:44,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:15:44,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-21 19:15:44,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:44,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935312387] [2020-07-21 19:15:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:45,005 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:15:45,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:15:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:15:45,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:15:45,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935312387] [2020-07-21 19:15:45,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:15:45,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:15:45,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659320302] [2020-07-21 19:15:45,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:15:45,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:45,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:15:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:15:45,112 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-21 19:15:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:45,268 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 19:15:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:15:45,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 19:15:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:45,281 INFO L225 Difference]: With dead ends: 42 [2020-07-21 19:15:45,281 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 19:15:45,285 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 [2020-07-21 19:15:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 19:15:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 19:15:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 19:15:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-07-21 19:15:45,340 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2020-07-21 19:15:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:45,340 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-07-21 19:15:45,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:15:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-07-21 19:15:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 19:15:45,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:45,344 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] [2020-07-21 19:15:45,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:45,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-21 19:15:45,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:45,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015290180] [2020-07-21 19:15:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:45,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:15:45,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:15:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 19:15:45,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:45,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:45,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:15:45,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015290180] [2020-07-21 19:15:45,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:45,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 19:15:45,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907961234] [2020-07-21 19:15:45,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:15:45,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:15:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:15:45,895 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-07-21 19:15:46,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:46,041 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-07-21 19:15:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:15:46,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 19:15:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:46,045 INFO L225 Difference]: With dead ends: 38 [2020-07-21 19:15:46,045 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 19:15:46,047 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 [2020-07-21 19:15:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 19:15:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 19:15:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 19:15:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-07-21 19:15:46,066 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 22 [2020-07-21 19:15:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:46,079 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-07-21 19:15:46,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:15:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-07-21 19:15:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 19:15:46,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:46,083 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] [2020-07-21 19:15:46,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:46,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 687949058, now seen corresponding path program 2 times [2020-07-21 19:15:46,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:46,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115678820] [2020-07-21 19:15:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:46,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:15:46,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:15:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:15:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115678820] [2020-07-21 19:15:46,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:46,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 19:15:46,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4303126] [2020-07-21 19:15:46,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 19:15:46,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 19:15:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-21 19:15:46,449 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 8 states. [2020-07-21 19:15:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:46,568 INFO L93 Difference]: Finished difference Result 87 states and 187 transitions. [2020-07-21 19:15:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:15:46,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-21 19:15:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:46,575 INFO L225 Difference]: With dead ends: 87 [2020-07-21 19:15:46,576 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:15:46,578 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 [2020-07-21 19:15:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:15:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-21 19:15:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 19:15:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2020-07-21 19:15:46,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 29 [2020-07-21 19:15:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:46,601 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2020-07-21 19:15:46,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 19:15:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2020-07-21 19:15:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 19:15:46,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:46,609 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] [2020-07-21 19:15:46,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:46,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 1 times [2020-07-21 19:15:46,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:46,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350810509] [2020-07-21 19:15:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:46,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:15:46,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:15:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 157 proven. 146 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-07-21 19:15:47,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:48,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 159 proven. 168 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-07-21 19:15:48,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350810509] [2020-07-21 19:15:48,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:48,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 19:15:48,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782574620] [2020-07-21 19:15:48,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:15:48,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:15:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:15:48,570 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand 12 states. [2020-07-21 19:15:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:48,824 INFO L93 Difference]: Finished difference Result 128 states and 498 transitions. [2020-07-21 19:15:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:15:48,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2020-07-21 19:15:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:48,833 INFO L225 Difference]: With dead ends: 128 [2020-07-21 19:15:48,834 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 19:15:48,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:15:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 19:15:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-21 19:15:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:15:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-07-21 19:15:48,866 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 122 [2020-07-21 19:15:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:48,867 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-07-21 19:15:48,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:15:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-07-21 19:15:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 19:15:48,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:48,872 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] [2020-07-21 19:15:49,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:49,081 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 2 times [2020-07-21 19:15:49,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:49,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717905965] [2020-07-21 19:15:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:49,156 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:15:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-07-21 19:15:49,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-21 19:15:50,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717905965] [2020-07-21 19:15:50,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:50,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-21 19:15:50,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914804488] [2020-07-21 19:15:50,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:15:50,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:15:50,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:15:50,832 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 24 states. [2020-07-21 19:15:51,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:51,166 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-07-21 19:15:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:15:51,168 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-07-21 19:15:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:51,170 INFO L225 Difference]: With dead ends: 97 [2020-07-21 19:15:51,170 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 19:15:51,172 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 [2020-07-21 19:15:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 19:15:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-07-21 19:15:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:15:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-07-21 19:15:51,180 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 82 [2020-07-21 19:15:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:51,181 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-07-21 19:15:51,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:15:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-07-21 19:15:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 19:15:51,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:51,186 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] [2020-07-21 19:15:51,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:51,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1706548602, now seen corresponding path program 3 times [2020-07-21 19:15:51,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:51,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371773582] [2020-07-21 19:15:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:51,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:51,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 19:15:51,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-07-21 19:15:51,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:53,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:53,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:53,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-07-21 19:15:55,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371773582] [2020-07-21 19:15:55,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:55,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 35 [2020-07-21 19:15:55,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806696929] [2020-07-21 19:15:55,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 19:15:55,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 19:15:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:15:55,943 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 35 states. [2020-07-21 19:15:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:57,127 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-07-21 19:15:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 19:15:57,128 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-07-21 19:15:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:57,136 INFO L225 Difference]: With dead ends: 126 [2020-07-21 19:15:57,136 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 19:15:57,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 241 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=3600, Unknown=0, NotChecked=0, Total=4422 [2020-07-21 19:15:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 19:15:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2020-07-21 19:15:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:15:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 19:15:57,163 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 147 [2020-07-21 19:15:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:57,166 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 19:15:57,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 19:15:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 19:15:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-21 19:15:57,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:57,173 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] [2020-07-21 19:15:57,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:57,389 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1628439286, now seen corresponding path program 4 times [2020-07-21 19:15:57,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:57,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000798711] [2020-07-21 19:15:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:57,515 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:57,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 19:15:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-07-21 19:15:57,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:15:58,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:58,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:58,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:58,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:15:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-21 19:15:59,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000798711] [2020-07-21 19:15:59,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:15:59,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2020-07-21 19:15:59,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870225051] [2020-07-21 19:15:59,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:15:59,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:15:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:15:59,695 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-07-21 19:16:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:00,170 INFO L93 Difference]: Finished difference Result 119 states and 153 transitions. [2020-07-21 19:16:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 19:16:00,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-07-21 19:16:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:00,173 INFO L225 Difference]: With dead ends: 119 [2020-07-21 19:16:00,173 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 19:16:00,175 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 [2020-07-21 19:16:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 19:16:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-21 19:16:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:16:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-07-21 19:16:00,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 147 [2020-07-21 19:16:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:00,184 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-07-21 19:16:00,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:16:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-07-21 19:16:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-21 19:16:00,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:00,187 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] [2020-07-21 19:16:00,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:00,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 5 times [2020-07-21 19:16:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:00,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276351467] [2020-07-21 19:16:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:00,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 19:16:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-21 19:16:00,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:02,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:02,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:02,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:02,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-07-21 19:16:05,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276351467] [2020-07-21 19:16:05,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:05,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 33 [2020-07-21 19:16:05,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721283023] [2020-07-21 19:16:05,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 19:16:05,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 19:16:05,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 19:16:05,392 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 33 states. [2020-07-21 19:16:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:06,528 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2020-07-21 19:16:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 19:16:06,528 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 160 [2020-07-21 19:16:06,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:06,531 INFO L225 Difference]: With dead ends: 137 [2020-07-21 19:16:06,531 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 19:16:06,534 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 [2020-07-21 19:16:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 19:16:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-07-21 19:16:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 19:16:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-21 19:16:06,544 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 160 [2020-07-21 19:16:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:06,545 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-21 19:16:06,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 19:16:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-21 19:16:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-21 19:16:06,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:06,548 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] [2020-07-21 19:16:06,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:06,763 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-21 19:16:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:06,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637929968] [2020-07-21 19:16:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:06,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-21 19:16:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 19:16:07,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:09,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-07-21 19:16:12,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637929968] [2020-07-21 19:16:12,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:12,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 30 [2020-07-21 19:16:12,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852383239] [2020-07-21 19:16:12,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 19:16:12,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:12,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 19:16:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:16:12,241 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 30 states. [2020-07-21 19:16:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:13,331 INFO L93 Difference]: Finished difference Result 152 states and 202 transitions. [2020-07-21 19:16:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 19:16:13,332 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2020-07-21 19:16:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:13,334 INFO L225 Difference]: With dead ends: 152 [2020-07-21 19:16:13,334 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 19:16:13,337 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 [2020-07-21 19:16:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 19:16:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-07-21 19:16:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 19:16:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2020-07-21 19:16:13,347 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 173 [2020-07-21 19:16:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:13,348 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2020-07-21 19:16:13,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 19:16:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2020-07-21 19:16:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-21 19:16:13,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:13,351 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] [2020-07-21 19:16:13,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:13,565 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-21 19:16:13,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:13,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220812853] [2020-07-21 19:16:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:13,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:13,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-21 19:16:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-21 19:16:14,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2020-07-21 19:16:16,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220812853] [2020-07-21 19:16:16,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:16,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 35 [2020-07-21 19:16:16,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033816767] [2020-07-21 19:16:16,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 19:16:16,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 19:16:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 19:16:16,442 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 35 states. [2020-07-21 19:16:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:27,925 INFO L93 Difference]: Finished difference Result 323 states and 516 transitions. [2020-07-21 19:16:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-21 19:16:27,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 186 [2020-07-21 19:16:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:27,935 INFO L225 Difference]: With dead ends: 323 [2020-07-21 19:16:27,936 INFO L226 Difference]: Without dead ends: 145 [2020-07-21 19:16:27,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2142, Invalid=20208, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 19:16:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-21 19:16:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-07-21 19:16:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 19:16:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2020-07-21 19:16:27,962 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 186 [2020-07-21 19:16:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:27,963 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2020-07-21 19:16:27,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 19:16:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2020-07-21 19:16:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 19:16:27,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:27,967 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] [2020-07-21 19:16:28,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:28,181 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 8 times [2020-07-21 19:16:28,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:28,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605033410] [2020-07-21 19:16:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:28,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:28,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 19:16:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-21 19:16:28,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:31,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:31,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:31,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:31,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:32,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2020-07-21 19:16:35,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605033410] [2020-07-21 19:16:35,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:35,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 34 [2020-07-21 19:16:35,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391976882] [2020-07-21 19:16:35,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 19:16:35,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:35,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 19:16:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 19:16:35,645 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand 34 states. [2020-07-21 19:16:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:37,110 INFO L93 Difference]: Finished difference Result 238 states and 329 transitions. [2020-07-21 19:16:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 19:16:37,111 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 199 [2020-07-21 19:16:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:37,114 INFO L225 Difference]: With dead ends: 238 [2020-07-21 19:16:37,114 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 19:16:37,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 329 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 19:16:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 19:16:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-07-21 19:16:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 19:16:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-07-21 19:16:37,148 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 199 [2020-07-21 19:16:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:37,152 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-07-21 19:16:37,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 19:16:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-07-21 19:16:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-21 19:16:37,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:37,157 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] [2020-07-21 19:16:37,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:37,372 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:37,372 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 9 times [2020-07-21 19:16:37,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:37,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298574728] [2020-07-21 19:16:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:37,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 19:16:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-21 19:16:37,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:40,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:40,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2020-07-21 19:16:41,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298574728] [2020-07-21 19:16:41,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:41,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 23 [2020-07-21 19:16:41,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59585768] [2020-07-21 19:16:41,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:16:41,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:16:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:16:41,329 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 23 states. [2020-07-21 19:16:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:41,948 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2020-07-21 19:16:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 19:16:41,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 212 [2020-07-21 19:16:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:41,951 INFO L225 Difference]: With dead ends: 172 [2020-07-21 19:16:41,951 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 19:16:41,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 380 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 19:16:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 19:16:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2020-07-21 19:16:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 19:16:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-07-21 19:16:41,961 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 212 [2020-07-21 19:16:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:41,962 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-07-21 19:16:41,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:16:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-07-21 19:16:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-21 19:16:41,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:41,964 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] [2020-07-21 19:16:42,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:42,178 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 10 times [2020-07-21 19:16:42,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:42,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224878672] [2020-07-21 19:16:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:42,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:16:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-21 19:16:42,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:43,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2020-07-21 19:16:44,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224878672] [2020-07-21 19:16:44,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:44,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 12 [2020-07-21 19:16:44,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589164370] [2020-07-21 19:16:44,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:16:44,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:16:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:16:44,043 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 12 states. [2020-07-21 19:16:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:44,192 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-21 19:16:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:16:44,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 284 [2020-07-21 19:16:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:44,194 INFO L225 Difference]: With dead ends: 85 [2020-07-21 19:16:44,195 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:16:44,196 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 [2020-07-21 19:16:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:16:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:16:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:16:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:16:44,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-21 19:16:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:44,197 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:16:44,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:16:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:16:44,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:16:44,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:44,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:16:44,953 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2020-07-21 19:16:45,090 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-07-21 19:16:45,452 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-07-21 19:16:50,268 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 10 [2020-07-21 19:16:53,835 WARN L193 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 320 DAG size of output: 59 [2020-07-21 19:16:54,101 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 12 [2020-07-21 19:16:54,241 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-07-21 19:16:54,244 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:16:54,244 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:16:54,245 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:16:54,245 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:16:54,245 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:16:54,245 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:16:54,245 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:16:54,245 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 19:16:54,246 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-21 19:16:54,246 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-21 19:16:54,246 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= 0 |ackermann_#in~n|) (= ackermann_~n |ackermann_#in~n|) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-21 19:16:54,247 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse11 (<= |ackermann_#in~m| ackermann_~m)) (.cse13 (<= |ackermann_#in~n| ackermann_~n)) (.cse12 (<= ackermann_~m |ackermann_#in~m|))) (let ((.cse4 (and .cse11 (<= |ackermann_#in~m| 0) .cse13 (<= 0 |ackermann_#in~m|) .cse12)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse5 (<= 2 |ackermann_#in~m|))) (and (let ((.cse2 (<= 3 |ackermann_#in~n|)) (.cse3 (<= 5 |ackermann_#t~ret1|)) (.cse6 (<= 2 |ackermann_#in~n|)) (.cse9 (<= 3 |ackermann_#t~ret1|)) (.cse10 (<= |ackermann_#t~ret1| 3)) (.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse7 (< |ackermann_#in~n| 2)) (.cse8 (<= 1 |ackermann_#in~n|))) (or (<= 3 |ackermann_#in~m|) (and .cse0 .cse1 .cse2 (<= |ackermann_#in~n| 3) (= 4 |ackermann_#t~ret1|)) (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 (= 5 |ackermann_#t~ret1|)) (and (<= 6 |ackermann_#in~n|) .cse0 .cse3) .cse4 (and .cse5 .cse0 .cse3 .cse2) (and .cse5 (<= |ackermann_#t~ret1| 5) .cse0 .cse3 .cse6) (and .cse0 .cse7 .cse1 (= 2 |ackermann_#t~ret1|) .cse8) (and .cse9 .cse10 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2)) (and .cse0 (<= 5 |ackermann_#in~n|) (= 6 |ackermann_#t~ret1|)) (and .cse9 .cse5 .cse10 .cse0 .cse7 .cse8))) (or .cse4 (and .cse11 .cse1 .cse12 (<= 1 |ackermann_#in~m|)) (and .cse11 .cse5 .cse13 .cse12))))) [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:16:54,247 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-21 19:16:54,248 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-21 19:16:54,249 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-21 19:16:54,249 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-21 19:16:54,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:16:54 BoogieIcfgContainer [2020-07-21 19:16:54,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:16:54,256 INFO L168 Benchmark]: Toolchain (without parser) took 70042.26 ms. Allocated memory was 145.8 MB in the beginning and 637.5 MB in the end (delta: 491.8 MB). Free memory was 103.9 MB in the beginning and 538.9 MB in the end (delta: -435.0 MB). Peak memory consumption was 496.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:16:54,256 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 19:16:54,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.60 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:16:54,257 INFO L168 Benchmark]: Boogie Preprocessor took 21.75 ms. Allocated memory is still 145.8 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:16:54,258 INFO L168 Benchmark]: RCFGBuilder took 338.30 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.6 MB in the beginning and 169.4 MB in the end (delta: -76.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:16:54,259 INFO L168 Benchmark]: TraceAbstraction took 69443.62 ms. Allocated memory was 202.9 MB in the beginning and 637.5 MB in the end (delta: 434.6 MB). Free memory was 169.4 MB in the beginning and 538.9 MB in the end (delta: -369.4 MB). Peak memory consumption was 504.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:16:54,261 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.60 ms. Allocated memory is still 145.8 MB. Free memory was 103.5 MB in the beginning and 94.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.75 ms. Allocated memory is still 145.8 MB. Free memory was 93.9 MB in the beginning and 92.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.30 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.6 MB in the beginning and 169.4 MB in the end (delta: -76.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 69443.62 ms. Allocated memory was 202.9 MB in the beginning and 637.5 MB in the end (delta: 434.6 MB). Free memory was 169.4 MB in the beginning and 538.9 MB in the end (delta: -369.4 MB). Peak memory consumption was 504.9 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: 59.5s, OverallIterations: 13, TraceHistogramMax: 42, AutomataDifference: 18.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 411 SDtfs, 611 SDslu, 2598 SDs, 0 SdLazy, 9370 SolverSat, 1880 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3829 GetRequests, 3094 SyntacticMatches, 184 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=10, 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, 645 PreInvPairs, 6196 NumberOfFragments, 231 HoareAnnotationTreeSize, 645 FomulaSimplifications, 1005512 FormulaSimplificationTreeSizeReduction, 5.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 160786 FormulaSimplificationTreeSizeReductionInter, 4.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 35.4s InterpolantComputationTime, 1778 NumberOfCodeBlocks, 1699 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 3516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1166092 SizeOfPredicates, 106 NumberOfNonLiveVariables, 5125 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 26186/32304 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...