/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:22:31,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:22:31,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:22:31,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 13:22:31,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:22:31,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:22:31,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:22:31,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:22:31,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:22:31,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:22:31,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:22:31,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:22:31,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:22:31,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:22:31,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:22:31,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:22:31,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:22:31,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:22:31,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:22:31,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:22:31,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:22:31,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:22:31,434 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:22:31,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:22:31,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:22:31,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:22:31,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:22:31,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:22:31,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:22:31,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:22:31,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:22:31,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:22:31,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:22:31,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:22:31,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:22:31,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:22:31,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:22:31,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:22:31,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:22:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:22:31,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:22:31,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:22:31,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:22:31,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:22:31,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:22:31,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:22:31,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:22:31,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:22:31,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:22:31,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:22:31,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:22:31,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:22:31,937 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:22:31,938 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-09-04 13:22:32,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02b9039ea/434846921e8944a6a14360db80ccddad/FLAG071b4015e [2020-09-04 13:22:32,672 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:22:32,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-09-04 13:22:32,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02b9039ea/434846921e8944a6a14360db80ccddad/FLAG071b4015e [2020-09-04 13:22:33,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02b9039ea/434846921e8944a6a14360db80ccddad [2020-09-04 13:22:33,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:22:33,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:22:33,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:33,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:22:33,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:22:33,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a592201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33, skipping insertion in model container [2020-09-04 13:22:33,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:22:33,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:22:33,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:33,326 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:22:33,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:22:33,358 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:22:33,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33 WrapperNode [2020-09-04 13:22:33,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:22:33,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:22:33,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:22:33,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:22:33,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... [2020-09-04 13:22:33,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:22:33,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:22:33,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:22:33,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:22:33,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:22:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:22:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-04 13:22:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:22:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:22:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-04 13:22:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:22:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:22:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:22:33,762 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:22:33,762 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:22:33,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:33 BoogieIcfgContainer [2020-09-04 13:22:33,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:22:33,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:22:33,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:22:33,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:22:33,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:22:33" (1/3) ... [2020-09-04 13:22:33,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0faf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:33, skipping insertion in model container [2020-09-04 13:22:33,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:22:33" (2/3) ... [2020-09-04 13:22:33,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0faf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:22:33, skipping insertion in model container [2020-09-04 13:22:33,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:22:33" (3/3) ... [2020-09-04 13:22:33,778 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-09-04 13:22:33,789 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:22:33,798 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:22:33,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:22:33,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:22:33,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:22:33,850 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:22:33,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:22:33,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:22:33,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:22:33,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:22:33,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:22:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 13:22:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:22:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:33,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:33,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-09-04 13:22:33,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:33,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681662775] [2020-09-04 13:22:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:22:34,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681662775] [2020-09-04 13:22:34,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:22:34,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:22:34,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341575676] [2020-09-04 13:22:34,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:22:34,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:22:34,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:22:34,179 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-04 13:22:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:34,287 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-04 13:22:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:22:34,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:22:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:34,308 INFO L225 Difference]: With dead ends: 30 [2020-09-04 13:22:34,308 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 13:22:34,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:22:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 13:22:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 13:22:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:22:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 13:22:34,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-04 13:22:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:34,397 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 13:22:34,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:22:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 13:22:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:22:34,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:34,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:34,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:22:34,400 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-09-04 13:22:34,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:34,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396981033] [2020-09-04 13:22:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:34,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396981033] [2020-09-04 13:22:34,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144490173] [2020-09-04 13:22:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:22:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:22:34,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:34,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-04 13:22:34,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001803318] [2020-09-04 13:22:34,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:22:34,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:22:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:22:34,777 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-09-04 13:22:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:34,855 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 13:22:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:22:34,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-04 13:22:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:34,858 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:22:34,858 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:22:34,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:22:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:22:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 13:22:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 13:22:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-04 13:22:34,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-04 13:22:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:34,872 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-04 13:22:34,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:22:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-04 13:22:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:22:34,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:34,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:35,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:22:35,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-09-04 13:22:35,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:35,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018794437] [2020-09-04 13:22:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:35,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018794437] [2020-09-04 13:22:35,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390636960] [2020-09-04 13:22:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:35,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:22:35,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:22:35,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:35,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-04 13:22:35,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891019796] [2020-09-04 13:22:35,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:22:35,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:22:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:22:35,455 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-09-04 13:22:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:35,561 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-04 13:22:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:22:35,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-04 13:22:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:35,564 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:22:35,564 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:22:35,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:22:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:22:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:22:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:22:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 13:22:35,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-04 13:22:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:35,581 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 13:22:35,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:22:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 13:22:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:22:35,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:35,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:35,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:35,799 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-09-04 13:22:35,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:35,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041563992] [2020-09-04 13:22:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041563992] [2020-09-04 13:22:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002130552] [2020-09-04 13:22:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:36,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:22:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:22:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:22:36,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:36,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-04 13:22:36,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357689060] [2020-09-04 13:22:36,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:22:36,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:36,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:22:36,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:22:36,096 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-09-04 13:22:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:36,175 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-04 13:22:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:22:36,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-04 13:22:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:36,177 INFO L225 Difference]: With dead ends: 31 [2020-09-04 13:22:36,177 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 13:22:36,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:22:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 13:22:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 13:22:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:22:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 13:22:36,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-04 13:22:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:36,185 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 13:22:36,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:22:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 13:22:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:22:36,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:36,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:36,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:36,401 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:36,402 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-09-04 13:22:36,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:36,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032940721] [2020-09-04 13:22:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:36,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032940721] [2020-09-04 13:22:36,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736393187] [2020-09-04 13:22:36,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:36,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:22:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 13:22:36,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:36,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-04 13:22:36,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951914748] [2020-09-04 13:22:36,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:22:36,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:22:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:22:36,829 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-09-04 13:22:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:36,956 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-04 13:22:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:22:36,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-04 13:22:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:36,958 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:22:36,958 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:22:36,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:22:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:22:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:22:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:22:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-04 13:22:36,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-04 13:22:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:36,981 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-04 13:22:36,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:22:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-04 13:22:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:22:36,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:36,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:37,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:37,200 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-09-04 13:22:37,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:37,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351942138] [2020-09-04 13:22:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:37,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351942138] [2020-09-04 13:22:37,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864782754] [2020-09-04 13:22:37,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:37,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-04 13:22:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:22:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:22:37,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:37,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-04 13:22:37,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799032552] [2020-09-04 13:22:37,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:22:37,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:22:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:22:37,753 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-09-04 13:22:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:37,907 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-04 13:22:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:22:37,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-04 13:22:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:37,909 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:22:37,909 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:22:37,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:22:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:22:37,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:22:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:22:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 13:22:37,918 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-04 13:22:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:37,919 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 13:22:37,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:22:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 13:22:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:22:37,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:37,921 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:38,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:22:38,135 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:38,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-09-04 13:22:38,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:38,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275287125] [2020-09-04 13:22:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:38,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275287125] [2020-09-04 13:22:38,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369231049] [2020-09-04 13:22:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:38,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:22:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:22:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-04 13:22:38,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:38,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-04 13:22:38,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434635922] [2020-09-04 13:22:38,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:22:38,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:38,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:22:38,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:22:38,510 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-09-04 13:22:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:38,624 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-04 13:22:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:22:38,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-09-04 13:22:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:38,626 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:22:38,626 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:22:38,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:22:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:22:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:22:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:22:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 13:22:38,633 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-04 13:22:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:38,634 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 13:22:38,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:22:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 13:22:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:22:38,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:38,636 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:38,849 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-09-04 13:22:38,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:38,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496403656] [2020-09-04 13:22:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:38,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:39,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496403656] [2020-09-04 13:22:39,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936394487] [2020-09-04 13:22:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:22:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 13:22:39,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:39,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-04 13:22:39,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855121555] [2020-09-04 13:22:39,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:22:39,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:22:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:22:39,313 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-09-04 13:22:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:39,487 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-04 13:22:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:22:39,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-04 13:22:39,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:39,489 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:22:39,489 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:22:39,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:22:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:22:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:22:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:22:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:22:39,496 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-04 13:22:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:39,497 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:22:39,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:22:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:22:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 13:22:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:39,499 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:39,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:39,700 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-09-04 13:22:39,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:39,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186684777] [2020-09-04 13:22:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:39,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:40,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186684777] [2020-09-04 13:22:40,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029847645] [2020-09-04 13:22:40,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:22:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:22:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-04 13:22:40,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:40,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-04 13:22:40,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64531079] [2020-09-04 13:22:40,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:22:40,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:22:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:22:40,201 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-09-04 13:22:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:40,348 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 13:22:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:22:40,348 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-09-04 13:22:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:40,350 INFO L225 Difference]: With dead ends: 46 [2020-09-04 13:22:40,350 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 13:22:40,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:22:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 13:22:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-04 13:22:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:22:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 13:22:40,358 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-04 13:22:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 13:22:40,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:22:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 13:22:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:22:40,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:40,360 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:40,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:22:40,574 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-09-04 13:22:40,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:40,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317958510] [2020-09-04 13:22:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:40,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317958510] [2020-09-04 13:22:40,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955572843] [2020-09-04 13:22:40,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:41,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:22:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-04 13:22:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-04 13:22:41,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:41,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-04 13:22:41,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085372982] [2020-09-04 13:22:41,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:22:41,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:22:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:22:41,120 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-09-04 13:22:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:41,276 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-04 13:22:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:22:41,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 13:22:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:41,278 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:22:41,279 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:22:41,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:22:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:22:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 13:22:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:22:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 13:22:41,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-04 13:22:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:41,286 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 13:22:41,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:22:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 13:22:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:22:41,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:41,288 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:41,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:41,502 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-09-04 13:22:41,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:41,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859036651] [2020-09-04 13:22:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:22:41,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859036651] [2020-09-04 13:22:41,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663788234] [2020-09-04 13:22:41,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:41,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:22:41,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-04 13:22:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-09-04 13:22:42,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:42,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-04 13:22:42,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851061570] [2020-09-04 13:22:42,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:22:42,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:22:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:22:42,077 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-09-04 13:22:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:42,295 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-09-04 13:22:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:22:42,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-04 13:22:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:42,297 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:22:42,297 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:22:42,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-09-04 13:22:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:22:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:22:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:22:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-09-04 13:22:42,305 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-09-04 13:22:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:42,305 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-09-04 13:22:42,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:22:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-09-04 13:22:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:22:42,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:42,307 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:42,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:42,520 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:42,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-09-04 13:22:42,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:42,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596550858] [2020-09-04 13:22:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:42,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:22:43,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596550858] [2020-09-04 13:22:43,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021104732] [2020-09-04 13:22:43,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:43,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:22:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-04 13:22:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-09-04 13:22:43,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:43,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-04 13:22:43,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036861438] [2020-09-04 13:22:43,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:22:43,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:22:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:22:43,157 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-09-04 13:22:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:43,394 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 13:22:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:22:43,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-09-04 13:22:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:43,396 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:22:43,397 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:22:43,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-09-04 13:22:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:22:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 13:22:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:22:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 13:22:43,405 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-09-04 13:22:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:43,405 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 13:22:43,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:22:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 13:22:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 13:22:43,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:43,407 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:43,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:22:43,615 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-09-04 13:22:43,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:43,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831983119] [2020-09-04 13:22:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:43,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:22:44,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831983119] [2020-09-04 13:22:44,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252780565] [2020-09-04 13:22:44,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:44,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:22:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 13:22:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-09-04 13:22:44,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:44,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-04 13:22:44,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027086424] [2020-09-04 13:22:44,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:22:44,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:44,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:22:44,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:22:44,295 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-09-04 13:22:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:44,535 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-09-04 13:22:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:22:44,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-09-04 13:22:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:44,536 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:22:44,536 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:22:44,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:22:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:22:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-04 13:22:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:22:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 13:22:44,552 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-09-04 13:22:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:44,553 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 13:22:44,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:22:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 13:22:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 13:22:44,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:44,554 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:44,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:22:44,768 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:44,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-09-04 13:22:44,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:44,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473723911] [2020-09-04 13:22:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:44,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:22:45,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473723911] [2020-09-04 13:22:45,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286230475] [2020-09-04 13:22:45,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-04 13:22:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-09-04 13:22:45,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:45,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-04 13:22:45,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125244181] [2020-09-04 13:22:45,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:22:45,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:22:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-09-04 13:22:45,552 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-09-04 13:22:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:45,810 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-09-04 13:22:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:22:45,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-09-04 13:22:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:45,812 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:22:45,812 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:22:45,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 13:22:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:22:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 13:22:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:22:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-04 13:22:45,829 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-09-04 13:22:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:45,830 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-04 13:22:45,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:22:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-04 13:22:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 13:22:45,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:45,831 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:46,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:22:46,048 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-09-04 13:22:46,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:46,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951044306] [2020-09-04 13:22:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:22:46,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951044306] [2020-09-04 13:22:46,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067830056] [2020-09-04 13:22:46,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:46,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:22:46,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:46,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-04 13:22:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-09-04 13:22:46,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:46,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-04 13:22:46,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423548866] [2020-09-04 13:22:46,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 13:22:46,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:46,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 13:22:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-09-04 13:22:46,859 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-09-04 13:22:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:47,083 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 13:22:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:22:47,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-09-04 13:22:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:47,085 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:22:47,085 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:22:47,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 13:22:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:22:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-04 13:22:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:22:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 13:22:47,092 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-09-04 13:22:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:47,092 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 13:22:47,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 13:22:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 13:22:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 13:22:47,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:22:47,094 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:22:47,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:47,310 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:22:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:22:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-09-04 13:22:47,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:22:47,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399286242] [2020-09-04 13:22:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:22:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:22:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:22:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:47,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:22:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:22:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-09-04 13:22:49,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399286242] [2020-09-04 13:22:49,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700363189] [2020-09-04 13:22:49,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:22:49,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-04 13:22:49,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:22:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 137 conjunts are in the unsatisfiable core [2020-09-04 13:22:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:22:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-09-04 13:22:51,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:22:51,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-09-04 13:22:51,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249390602] [2020-09-04 13:22:51,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 13:22:51,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:22:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 13:22:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 13:22:51,586 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 74 states. [2020-09-04 13:22:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:22:55,604 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-09-04 13:22:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 13:22:55,605 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 103 [2020-09-04 13:22:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:22:55,606 INFO L225 Difference]: With dead ends: 63 [2020-09-04 13:22:55,606 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:22:55,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2020-09-04 13:22:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:22:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:22:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:22:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:22:55,611 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-09-04 13:22:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:22:55,611 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:22:55,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 13:22:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:22:55,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:22:55,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:22:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:22:55,857 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:22:55,857 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:55,857 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:22:55,858 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:22:55,858 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:22:55,858 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:22:55,858 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-09-04 13:22:55,858 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-09-04 13:22:55,858 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-09-04 13:22:55,859 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-09-04 13:22:55,859 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-09-04 13:22:55,859 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-09-04 13:22:55,859 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-09-04 13:22:55,860 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-09-04 13:22:55,860 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-09-04 13:22:55,860 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-04 13:22:55,860 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-09-04 13:22:55,860 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~a~0 15) [2020-09-04 13:22:55,860 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-04 13:22:55,861 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-09-04 13:22:55,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:22:55 BoogieIcfgContainer [2020-09-04 13:22:55,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:22:55,872 INFO L168 Benchmark]: Toolchain (without parser) took 22821.51 ms. Allocated memory was 139.5 MB in the beginning and 454.6 MB in the end (delta: 315.1 MB). Free memory was 102.9 MB in the beginning and 310.2 MB in the end (delta: -207.3 MB). Peak memory consumption was 107.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,873 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,874 INFO L168 Benchmark]: Boogie Preprocessor took 29.83 ms. Allocated memory is still 139.5 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,875 INFO L168 Benchmark]: RCFGBuilder took 378.00 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 168.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,876 INFO L168 Benchmark]: TraceAbstraction took 22099.77 ms. Allocated memory was 201.3 MB in the beginning and 454.6 MB in the end (delta: 253.2 MB). Free memory was 168.8 MB in the beginning and 310.2 MB in the end (delta: -141.4 MB). Peak memory consumption was 111.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:22:55,879 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.83 ms. Allocated memory is still 139.5 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.00 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 168.8 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22099.77 ms. Allocated memory was 201.3 MB in the beginning and 454.6 MB in the end (delta: 253.2 MB). Free memory was 168.8 MB in the beginning and 310.2 MB in the end (delta: -141.4 MB). Peak memory consumption was 111.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.9s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 511 SDslu, 1615 SDs, 0 SdLazy, 2090 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1559 GetRequests, 1170 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1843 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1812 ConstructedInterpolants, 0 QuantifiedInterpolants, 414750 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2700 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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...