/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:53,296 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 10:45:53,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:53,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:53,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:53,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:53,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:53,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:53,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:53,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:53,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:53,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:53,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:53,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:53,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:53,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:53,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:53,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:53,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:53,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:53,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:53,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:53,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:53,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:53,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:53,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:53,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:45:53,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:53,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:53,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:53,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:53,421 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:53,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:53,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:53,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:53,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:53,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:53,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:53,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:53,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:53,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:53,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:53,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:53,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:53,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:53,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:53,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:53,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:53,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:53,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:53,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:53,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:53,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:53,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:53,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:53,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:53,428 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 -> NOT_INCREMENTALLY [2020-07-20 10:45:53,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:53,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:53,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:53,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:53,789 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:53,790 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 10:45:53,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3a1c70e/628743af9f354123927256819fce77d3/FLAG6282438ee [2020-07-20 10:45:54,396 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:54,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 10:45:54,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3a1c70e/628743af9f354123927256819fce77d3/FLAG6282438ee [2020-07-20 10:45:54,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3a1c70e/628743af9f354123927256819fce77d3 [2020-07-20 10:45:54,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:54,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:54,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:54,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:54,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:54,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:54" (1/1) ... [2020-07-20 10:45:54,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccc7e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:54, skipping insertion in model container [2020-07-20 10:45:54,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:54" (1/1) ... [2020-07-20 10:45:54,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:54,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:54,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:54,998 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:55,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:55,032 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:55,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55 WrapperNode [2020-07-20 10:45:55,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:55,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:55,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:55,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:55,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... [2020-07-20 10:45:55,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:55,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:55,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:55,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:55,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:55,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:55,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:55,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 10:45:55,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:45:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 10:45:55,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:55,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:55,428 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:55,428 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:45:55,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:55 BoogieIcfgContainer [2020-07-20 10:45:55,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:55,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:55,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:55,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:55,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:54" (1/3) ... [2020-07-20 10:45:55,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb1405a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:55, skipping insertion in model container [2020-07-20 10:45:55,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:55" (2/3) ... [2020-07-20 10:45:55,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb1405a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:55, skipping insertion in model container [2020-07-20 10:45:55,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:55" (3/3) ... [2020-07-20 10:45:55,443 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-20 10:45:55,455 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:55,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:55,480 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:55,509 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:55,509 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:55,510 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:55,510 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:55,511 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:55,511 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:55,512 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:55,512 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 10:45:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 10:45:55,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:55,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:55,556 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 10:45:55,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:55,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129145169] [2020-07-20 10:45:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:55,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:55,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129145169] [2020-07-20 10:45:55,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:55,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:45:55,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236013549] [2020-07-20 10:45:55,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:45:55,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:45:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:45:55,837 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-20 10:45:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:56,051 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-07-20 10:45:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:45:56,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 10:45:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:56,066 INFO L225 Difference]: With dead ends: 41 [2020-07-20 10:45:56,067 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 10:45:56,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 10:45:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 10:45:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 10:45:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 10:45:56,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-20 10:45:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:56,123 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 10:45:56,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:45:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 10:45:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 10:45:56,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:56,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:56,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:56,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:56,344 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 10:45:56,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:56,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300046602] [2020-07-20 10:45:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:45:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:45:56,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 10:45:56,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300046602] [2020-07-20 10:45:56,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:45:56,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-07-20 10:45:56,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086534641] [2020-07-20 10:45:56,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:56,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:45:56,820 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-20 10:45:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:57,006 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-20 10:45:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:57,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 10:45:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:57,009 INFO L225 Difference]: With dead ends: 32 [2020-07-20 10:45:57,010 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:45:57,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:45:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:45:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 10:45:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 10:45:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-20 10:45:57,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-20 10:45:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:57,021 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-20 10:45:57,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-20 10:45:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 10:45:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:57,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:57,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,226 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-20 10:45:57,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:57,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445183738] [2020-07-20 10:45:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:57,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:45:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:45:57,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:45:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445183738] [2020-07-20 10:45:57,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:57,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 10:45:57,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623370176] [2020-07-20 10:45:57,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:45:57,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:45:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:45:57,556 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 9 states. [2020-07-20 10:45:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:57,727 INFO L93 Difference]: Finished difference Result 53 states and 81 transitions. [2020-07-20 10:45:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:45:57,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 10:45:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:57,730 INFO L225 Difference]: With dead ends: 53 [2020-07-20 10:45:57,730 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:45:57,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:45:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:45:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 10:45:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 10:45:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 10:45:57,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-20 10:45:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:57,741 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 10:45:57,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:45:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 10:45:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 10:45:57,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:57,744 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:57,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:57,959 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-20 10:45:57,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:57,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563261671] [2020-07-20 10:45:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:58,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:45:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 10:45:58,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 10:45:58,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563261671] [2020-07-20 10:45:58,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:58,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-07-20 10:45:58,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130281064] [2020-07-20 10:45:58,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:45:58,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:45:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:45:58,779 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 22 states. [2020-07-20 10:45:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:59,402 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions. [2020-07-20 10:45:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 10:45:59,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 35 [2020-07-20 10:45:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:59,411 INFO L225 Difference]: With dead ends: 56 [2020-07-20 10:45:59,412 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 10:45:59,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 10:45:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 10:45:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-07-20 10:45:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 10:45:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 67 transitions. [2020-07-20 10:45:59,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 67 transitions. Word has length 35 [2020-07-20 10:45:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:59,459 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 67 transitions. [2020-07-20 10:45:59,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:45:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 67 transitions. [2020-07-20 10:45:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 10:45:59,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:59,465 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:59,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:59,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash -692340191, now seen corresponding path program 2 times [2020-07-20 10:45:59,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:59,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446542506] [2020-07-20 10:45:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:45:59,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 10:45:59,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-20 10:46:00,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446542506] [2020-07-20 10:46:00,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:00,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 10:46:00,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796169043] [2020-07-20 10:46:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 10:46:00,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 10:46:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:46:00,258 INFO L87 Difference]: Start difference. First operand 41 states and 67 transitions. Second operand 14 states. [2020-07-20 10:46:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:00,466 INFO L93 Difference]: Finished difference Result 84 states and 183 transitions. [2020-07-20 10:46:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:00,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-07-20 10:46:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:00,470 INFO L225 Difference]: With dead ends: 84 [2020-07-20 10:46:00,470 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 10:46:00,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:46:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 10:46:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-07-20 10:46:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 10:46:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-07-20 10:46:00,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 49 [2020-07-20 10:46:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:00,487 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-07-20 10:46:00,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 10:46:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-07-20 10:46:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 10:46:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:00,491 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:00,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:00,704 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1882326077, now seen corresponding path program 3 times [2020-07-20 10:46:00,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:00,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810646270] [2020-07-20 10:46:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:46:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 60 proven. 63 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-20 10:46:00,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:01,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:01,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:01,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 10:46:01,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810646270] [2020-07-20 10:46:01,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:01,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2020-07-20 10:46:01,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796567124] [2020-07-20 10:46:01,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:46:01,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:46:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:46:01,327 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 9 states. [2020-07-20 10:46:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:01,467 INFO L93 Difference]: Finished difference Result 122 states and 312 transitions. [2020-07-20 10:46:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:46:01,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2020-07-20 10:46:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:01,473 INFO L225 Difference]: With dead ends: 122 [2020-07-20 10:46:01,474 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 10:46:01,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-07-20 10:46:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 10:46:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 10:46:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 10:46:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 154 transitions. [2020-07-20 10:46:01,497 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 154 transitions. Word has length 82 [2020-07-20 10:46:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:01,498 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 154 transitions. [2020-07-20 10:46:01,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:46:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 154 transitions. [2020-07-20 10:46:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 10:46:01,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:01,502 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:01,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:01,717 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1731624099, now seen corresponding path program 4 times [2020-07-20 10:46:01,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:01,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803214947] [2020-07-20 10:46:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:46:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 79 proven. 89 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-07-20 10:46:01,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:02,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:02,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:02,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:02,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:02,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-07-20 10:46:03,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803214947] [2020-07-20 10:46:03,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:03,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 10:46:03,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153232770] [2020-07-20 10:46:03,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:46:03,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:46:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:46:03,024 INFO L87 Difference]: Start difference. First operand 69 states and 154 transitions. Second operand 13 states. [2020-07-20 10:46:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:03,289 INFO L93 Difference]: Finished difference Result 167 states and 527 transitions. [2020-07-20 10:46:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:46:03,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 10:46:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:03,295 INFO L225 Difference]: With dead ends: 167 [2020-07-20 10:46:03,296 INFO L226 Difference]: Without dead ends: 106 [2020-07-20 10:46:03,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:46:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-20 10:46:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-07-20 10:46:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 10:46:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 254 transitions. [2020-07-20 10:46:03,327 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 254 transitions. Word has length 82 [2020-07-20 10:46:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:03,328 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 254 transitions. [2020-07-20 10:46:03,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:46:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 254 transitions. [2020-07-20 10:46:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 10:46:03,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:03,330 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:03,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:03,544 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -615976298, now seen corresponding path program 5 times [2020-07-20 10:46:03,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:03,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717466630] [2020-07-20 10:46:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:03,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:46:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 37 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 10:46:03,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-20 10:46:05,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717466630] [2020-07-20 10:46:05,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:05,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-07-20 10:46:05,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556533955] [2020-07-20 10:46:05,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 10:46:05,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:05,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 10:46:05,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-07-20 10:46:05,430 INFO L87 Difference]: Start difference. First operand 106 states and 254 transitions. Second operand 24 states. [2020-07-20 10:46:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:05,761 INFO L93 Difference]: Finished difference Result 150 states and 380 transitions. [2020-07-20 10:46:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:46:05,763 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-07-20 10:46:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:05,765 INFO L225 Difference]: With dead ends: 150 [2020-07-20 10:46:05,765 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:46:05,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 10:46:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:46:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:46:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:46:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:46:05,771 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-20 10:46:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:05,773 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:46:05,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 10:46:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:46:05,773 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:46:05,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:05,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:46:06,801 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-07-20 10:46:06,945 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2020-07-20 10:46:06,952 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:46:06,952 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:46:06,952 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:46:06,952 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:46:06,953 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:46:06,953 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:46:06,953 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-20 10:46:06,953 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~n |ackermann_#in~n|) (<= |ackermann_#in~n| ackermann_~n) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= ackermann_~m |ackermann_#in~m|)) [2020-07-20 10:46:06,953 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-20 10:46:06,953 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 10:46:06,954 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~m| ackermann_~m) (<= ackermann_~n |ackermann_#in~n|) (<= 0 |ackermann_#in~n|) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (<= |ackermann_#in~n| ackermann_~n) (<= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| 0)) [2020-07-20 10:46:06,954 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= |ackermann_#in~m| ackermann_~m)) (.cse1 (<= |ackermann_#in~n| ackermann_~n))) (let ((.cse2 (and .cse0 (<= ackermann_~m 0) .cse1 (<= 0 |ackermann_#in~m|)))) (and (or (and .cse0 (<= ackermann_~n |ackermann_#in~n|) .cse1 (<= ackermann_~m |ackermann_#in~m|) (<= 1 |ackermann_#in~n|)) .cse2) (or (not (<= |ackermann_#in~m| 0)) .cse2) (or (<= 3 |ackermann_#t~ret1|) .cse2 (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1)))))) [2020-07-20 10:46:06,954 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 10:46:06,954 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 10:46:06,954 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-20 10:46:06,955 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 10:46:06,955 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-20 10:46:06,955 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-20 10:46:06,959 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-20 10:46:06,960 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 10:46:06,960 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-20 10:46:06,960 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-20 10:46:06,960 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-20 10:46:06,960 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-20 10:46:06,960 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-07-20 10:46:06,961 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-20 10:46:06,961 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-20 10:46:06,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:46:06 BoogieIcfgContainer [2020-07-20 10:46:06,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:46:06,972 INFO L168 Benchmark]: Toolchain (without parser) took 12202.15 ms. Allocated memory was 146.8 MB in the beginning and 316.7 MB in the end (delta: 169.9 MB). Free memory was 104.6 MB in the beginning and 267.6 MB in the end (delta: -163.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,973 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.19 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 94.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,974 INFO L168 Benchmark]: Boogie Preprocessor took 28.89 ms. Allocated memory is still 146.8 MB. Free memory was 94.8 MB in the beginning and 93.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,975 INFO L168 Benchmark]: RCFGBuilder took 370.83 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 93.3 MB in the beginning and 168.2 MB in the end (delta: -74.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,976 INFO L168 Benchmark]: TraceAbstraction took 11533.39 ms. Allocated memory was 201.9 MB in the beginning and 316.7 MB in the end (delta: 114.8 MB). Free memory was 167.5 MB in the beginning and 267.6 MB in the end (delta: -100.1 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:46:06,980 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.19 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 94.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.89 ms. Allocated memory is still 146.8 MB. Free memory was 94.8 MB in the beginning and 93.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.83 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 93.3 MB in the beginning and 168.2 MB in the end (delta: -74.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11533.39 ms. Allocated memory was 201.9 MB in the beginning and 316.7 MB in the end (delta: 114.8 MB). Free memory was 167.5 MB in the beginning and 267.6 MB in the end (delta: -100.1 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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: 10.4s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 179 SDtfs, 225 SDslu, 725 SDs, 0 SdLazy, 904 SolverSat, 283 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 802 GetRequests, 621 SyntacticMatches, 34 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 213 PreInvPairs, 382 NumberOfFragments, 129 HoareAnnotationTreeSize, 213 FomulaSimplifications, 2303 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1533 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 382 NumberOfCodeBlocks, 382 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 734 ConstructedInterpolants, 0 QuantifiedInterpolants, 92642 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1134 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 1218/1636 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...