/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:46:03,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:46:03,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:46:03,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:46:03,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:46:03,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:46:03,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:46:03,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:46:03,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:46:03,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:46:03,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:46:03,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:46:03,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:46:03,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:46:03,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:46:03,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:46:03,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:46:03,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:46:03,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:46:03,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:46:03,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:46:03,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:46:03,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:46:03,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:46:03,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:46:03,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:46:03,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:46:03,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:46:03,379 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 [2020-07-19 21:46:03,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:46:03,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:46:03,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:46:03,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:46:03,403 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:46:03,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:46:03,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:46:03,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:46:03,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:46:03,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:46:03,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:46:03,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:46:03,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:46:03,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:46:03,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:46:03,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:46:03,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:46:03,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:46:03,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:46:03,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:46:03,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:46:03,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:46:03,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:46:03,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:46:03,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:46:03,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:46:03,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:46:03,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:46:03,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:46:03,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:46:03,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:46:03,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:46:03,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:46:03,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:46:03,696 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:46:03,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-19 21:46:03,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0618ce118/70702f2420c54618b2f3d0227ae1d98b/FLAG6cc45e326 [2020-07-19 21:46:04,222 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:46:04,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-19 21:46:04,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0618ce118/70702f2420c54618b2f3d0227ae1d98b/FLAG6cc45e326 [2020-07-19 21:46:04,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0618ce118/70702f2420c54618b2f3d0227ae1d98b [2020-07-19 21:46:04,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:46:04,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:46:04,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:04,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:46:04,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:46:04,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2c1fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04, skipping insertion in model container [2020-07-19 21:46:04,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:46:04,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:46:04,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:04,780 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:46:04,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:04,808 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:46:04,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04 WrapperNode [2020-07-19 21:46:04,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:04,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:46:04,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:46:04,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:46:04,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (1/1) ... [2020-07-19 21:46:04,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:46:04,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:46:04,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:46:04,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:46:04,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (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 [2020-07-19 21:46:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:46:04,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:46:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:46:04,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:46:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:46:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:46:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:46:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:46:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:46:05,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:46:05,145 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:46:05,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:05 BoogieIcfgContainer [2020-07-19 21:46:05,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:46:05,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:46:05,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:46:05,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:46:05,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:46:04" (1/3) ... [2020-07-19 21:46:05,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3988be53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:05, skipping insertion in model container [2020-07-19 21:46:05,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:04" (2/3) ... [2020-07-19 21:46:05,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3988be53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:05, skipping insertion in model container [2020-07-19 21:46:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:05" (3/3) ... [2020-07-19 21:46:05,157 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-19 21:46:05,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:46:05,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:46:05,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:46:05,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:46:05,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:46:05,208 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:46:05,211 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:46:05,211 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:46:05,211 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:46:05,211 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:46:05,211 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:46:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-19 21:46:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:46:05,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:05,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:05,239 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-07-19 21:46:05,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:05,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615255624] [2020-07-19 21:46:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:05,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615255624] [2020-07-19 21:46:05,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:05,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:46:05,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116089540] [2020-07-19 21:46:05,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:46:05,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:46:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:46:05,373 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-07-19 21:46:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:05,398 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-19 21:46:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:46:05,400 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 21:46:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:05,410 INFO L225 Difference]: With dead ends: 29 [2020-07-19 21:46:05,410 INFO L226 Difference]: Without dead ends: 12 [2020-07-19 21:46:05,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:46:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-19 21:46:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-19 21:46:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-19 21:46:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-19 21:46:05,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-19 21:46:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:05,457 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-19 21:46:05,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:46:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-19 21:46:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:46:05,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:05,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:05,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:46:05,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:05,460 INFO L82 PathProgramCache]: Analyzing trace with hash -15914692, now seen corresponding path program 1 times [2020-07-19 21:46:05,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:05,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774352162] [2020-07-19 21:46:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774352162] [2020-07-19 21:46:05,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:05,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:46:05,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353516266] [2020-07-19 21:46:05,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:46:05,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:46:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:46:05,549 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-07-19 21:46:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:05,706 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-19 21:46:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:46:05,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-19 21:46:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:05,708 INFO L225 Difference]: With dead ends: 19 [2020-07-19 21:46:05,708 INFO L226 Difference]: Without dead ends: 14 [2020-07-19 21:46:05,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:46:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-19 21:46:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-19 21:46:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-19 21:46:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-19 21:46:05,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-19 21:46:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:05,717 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-19 21:46:05,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:46:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-19 21:46:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-19 21:46:05,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:05,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:05,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:46:05,720 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-07-19 21:46:05,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:05,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280714091] [2020-07-19 21:46:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:05,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280714091] [2020-07-19 21:46:05,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541056152] [2020-07-19 21:46:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:46:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:05,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:05,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-19 21:46:05,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588924125] [2020-07-19 21:46:05,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:46:05,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:05,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:46:05,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:46:05,865 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-07-19 21:46:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:05,895 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-19 21:46:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:46:05,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-19 21:46:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:05,897 INFO L225 Difference]: With dead ends: 21 [2020-07-19 21:46:05,897 INFO L226 Difference]: Without dead ends: 16 [2020-07-19 21:46:05,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:46:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-19 21:46:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-19 21:46:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 21:46:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-19 21:46:05,902 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-19 21:46:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:05,903 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-19 21:46:05,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:46:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-19 21:46:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:46:05,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:05,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:06,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:46:06,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2020-07-19 21:46:06,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:06,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354366540] [2020-07-19 21:46:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354366540] [2020-07-19 21:46:06,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947053282] [2020-07-19 21:46:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:46:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:06,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-19 21:46:06,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231864764] [2020-07-19 21:46:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:46:06,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:46:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:06,208 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-19 21:46:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:06,238 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-19 21:46:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:46:06,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 21:46:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:06,240 INFO L225 Difference]: With dead ends: 23 [2020-07-19 21:46:06,240 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 21:46:06,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 21:46:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-19 21:46:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-19 21:46:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-19 21:46:06,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-19 21:46:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:06,246 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-19 21:46:06,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:46:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-19 21:46:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:46:06,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:06,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:06,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:06,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2020-07-19 21:46:06,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:06,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8885166] [2020-07-19 21:46:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8885166] [2020-07-19 21:46:06,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919548038] [2020-07-19 21:46:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-19 21:46:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:46:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:06,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-19 21:46:06,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891876195] [2020-07-19 21:46:06,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:46:06,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:06,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:46:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:06,584 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-07-19 21:46:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:06,621 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-19 21:46:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:06,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-19 21:46:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:06,623 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:46:06,623 INFO L226 Difference]: Without dead ends: 20 [2020-07-19 21:46:06,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:46:06,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-19 21:46:06,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-19 21:46:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-19 21:46:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-19 21:46:06,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-19 21:46:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:06,629 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-19 21:46:06,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:46:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-19 21:46:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:46:06,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:06,630 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:06,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:06,845 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2020-07-19 21:46:06,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:06,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160574920] [2020-07-19 21:46:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160574920] [2020-07-19 21:46:06,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896635067] [2020-07-19 21:46:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:46:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:06,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:06,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-19 21:46:06,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58277603] [2020-07-19 21:46:06,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:46:06,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:07,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:46:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:07,000 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-07-19 21:46:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:07,056 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-19 21:46:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:46:07,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-19 21:46:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:07,057 INFO L225 Difference]: With dead ends: 27 [2020-07-19 21:46:07,058 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 21:46:07,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:46:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 21:46:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-19 21:46:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:46:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-19 21:46:07,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-07-19 21:46:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:07,069 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-19 21:46:07,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:46:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-19 21:46:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:46:07,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:07,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:07,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:07,283 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2020-07-19 21:46:07,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:07,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062210732] [2020-07-19 21:46:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:07,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062210732] [2020-07-19 21:46:07,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16602626] [2020-07-19 21:46:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:46:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:07,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:07,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-19 21:46:07,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632212944] [2020-07-19 21:46:07,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:46:07,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:46:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:07,421 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-07-19 21:46:07,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:07,461 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-19 21:46:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:46:07,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-19 21:46:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:07,462 INFO L225 Difference]: With dead ends: 29 [2020-07-19 21:46:07,462 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:46:07,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:46:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:46:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-19 21:46:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:46:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-19 21:46:07,468 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-07-19 21:46:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:07,468 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-19 21:46:07,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:46:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-19 21:46:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:46:07,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:07,469 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:07,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:46:07,680 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:07,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2020-07-19 21:46:07,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:07,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860444197] [2020-07-19 21:46:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:07,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860444197] [2020-07-19 21:46:07,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852831524] [2020-07-19 21:46:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:46:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:07,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:07,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-07-19 21:46:07,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631605312] [2020-07-19 21:46:07,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:46:07,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:07,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:46:07,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:07,799 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-07-19 21:46:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:07,832 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-19 21:46:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:46:07,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-19 21:46:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:07,834 INFO L225 Difference]: With dead ends: 31 [2020-07-19 21:46:07,835 INFO L226 Difference]: Without dead ends: 26 [2020-07-19 21:46:07,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:46:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-19 21:46:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-19 21:46:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 21:46:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-19 21:46:07,840 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-07-19 21:46:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:07,841 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-19 21:46:07,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:46:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-19 21:46:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:46:07,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:07,842 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:08,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:08,056 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2020-07-19 21:46:08,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:08,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237239253] [2020-07-19 21:46:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:08,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237239253] [2020-07-19 21:46:08,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282683425] [2020-07-19 21:46:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-19 21:46:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:46:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:08,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:08,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-07-19 21:46:08,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163561142] [2020-07-19 21:46:08,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:46:08,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:08,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:46:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:08,206 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-07-19 21:46:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:08,242 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-07-19 21:46:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:46:08,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-19 21:46:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:08,244 INFO L225 Difference]: With dead ends: 32 [2020-07-19 21:46:08,244 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:46:08,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:46:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:46:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 21:46:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:46:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-19 21:46:08,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-07-19 21:46:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:08,249 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-19 21:46:08,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:46:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-19 21:46:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:46:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:08,250 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:08,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:08,462 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2020-07-19 21:46:08,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:08,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367855053] [2020-07-19 21:46:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:08,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367855053] [2020-07-19 21:46:08,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627686245] [2020-07-19 21:46:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:08,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:46:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:08,742 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:46:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:08,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:08,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-19 21:46:08,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403531977] [2020-07-19 21:46:08,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:46:08,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:46:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:46:08,801 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-19 21:46:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:08,922 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-19 21:46:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:46:08,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-07-19 21:46:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:08,924 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:46:08,924 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 21:46:08,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:46:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 21:46:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-19 21:46:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:46:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-19 21:46:08,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-19 21:46:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:08,930 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-19 21:46:08,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:46:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-19 21:46:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:46:08,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:08,932 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:09,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:46:09,145 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2020-07-19 21:46:09,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:09,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900945343] [2020-07-19 21:46:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@16b74266 [2020-07-19 21:46:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:46:09,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900945343] [2020-07-19 21:46:09,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:09,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-19 21:46:09,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968013161] [2020-07-19 21:46:09,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:46:09,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:46:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:09,235 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-07-19 21:46:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:09,292 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-19 21:46:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:46:09,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-19 21:46:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:09,294 INFO L225 Difference]: With dead ends: 29 [2020-07-19 21:46:09,294 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:46:09,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:46:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:46:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:46:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:46:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:46:09,296 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-19 21:46:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:09,296 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:46:09,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:46:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:46:09,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:46:09,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 21:46:09,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:46:09,439 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:46:09,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:09,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:09,439 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:46:09,439 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:46:09,439 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:09,439 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-19 21:46:09,439 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-19 21:46:09,440 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-07-19 21:46:09,440 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-19 21:46:09,441 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8) (<= main_~i~0 5)) (and (<= main_~sn~0 0) (<= 0 main_~sn~0) (<= main_~i~0 1) (<= 1 main_~i~0)) (and (<= main_~i~0 3) (<= 4 main_~sn~0) (<= 3 main_~i~0) (<= main_~sn~0 4)) (and (<= main_~sn~0 6) (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0)) (and (<= main_~sn~0 16) (<= 9 main_~i~0) (<= 16 main_~sn~0)) (and (<= 14 main_~sn~0) (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 12 main_~sn~0) (<= main_~i~0 7) (<= 7 main_~i~0) (<= main_~sn~0 12))) [2020-07-19 21:46:09,441 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (<= 16 main_~sn~0)) [2020-07-19 21:46:09,441 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-19 21:46:09,441 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:46:09,441 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:46:09,442 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:46:09,442 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-19 21:46:09,442 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:46:09,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:46:09 BoogieIcfgContainer [2020-07-19 21:46:09,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:46:09,462 INFO L168 Benchmark]: Toolchain (without parser) took 4866.83 ms. Allocated memory was 144.7 MB in the beginning and 245.9 MB in the end (delta: 101.2 MB). Free memory was 103.3 MB in the beginning and 187.6 MB in the end (delta: -84.3 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,463 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.16 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,465 INFO L168 Benchmark]: Boogie Preprocessor took 26.39 ms. Allocated memory is still 144.7 MB. Free memory was 93.1 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,466 INFO L168 Benchmark]: RCFGBuilder took 312.17 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 170.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,466 INFO L168 Benchmark]: TraceAbstraction took 4310.10 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 169.4 MB in the beginning and 187.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:09,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 213.16 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.39 ms. Allocated memory is still 144.7 MB. Free memory was 93.1 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.17 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 170.1 MB in the end (delta: -78.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4310.10 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 169.4 MB in the beginning and 187.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((8 <= sn && 5 <= i) && sn <= 8) && i <= 5) || (((sn <= 0 && 0 <= sn) && i <= 1) && 1 <= i)) || (((i <= 3 && 4 <= sn) && 3 <= i) && sn <= 4)) || (((sn <= 6 && i <= 4) && 6 <= sn) && 4 <= i)) || ((sn <= 16 && 9 <= i) && 16 <= sn)) || (((14 <= sn && i <= 8) && 8 <= i) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && 6 <= i) && i <= 6)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((12 <= sn && i <= 7) && 7 <= i) && sn <= 12) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 37 SDslu, 380 SDs, 0 SdLazy, 276 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 352 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 8 NumberOfNonLiveVariables, 372 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 81/489 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...