/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/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:08,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:08,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:08,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:08,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:08,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:08,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:08,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:08,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:08,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:08,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:08,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:08,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:08,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:08,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:08,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:08,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:08,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:08,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:08,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:08,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:08,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:08,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:08,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:08,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:08,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:08,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:08,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:08,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:56:08,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:08,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:08,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:08,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:08,482 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:08,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:08,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:08,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:08,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:08,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:08,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:08,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:08,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:08,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:08,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:08,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:08,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:08,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:08,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:08,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:08,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:08,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:08,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:08,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:08,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:08,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:08,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:08,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:08,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:08,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:08,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:08,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:08,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:08,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:08,801 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:08,802 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 16:56:08,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79cfa81c8/5a774709fc104e0485ded3bd6dffa045/FLAGbe878df84 [2020-08-22 16:56:09,348 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:09,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 16:56:09,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79cfa81c8/5a774709fc104e0485ded3bd6dffa045/FLAGbe878df84 [2020-08-22 16:56:09,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79cfa81c8/5a774709fc104e0485ded3bd6dffa045 [2020-08-22 16:56:09,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:09,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:09,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:09,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:09,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:09,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:09" (1/1) ... [2020-08-22 16:56:09,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:09, skipping insertion in model container [2020-08-22 16:56:09,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:09" (1/1) ... [2020-08-22 16:56:09,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:09,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:10,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:10,078 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:10,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:10,211 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:10,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10 WrapperNode [2020-08-22 16:56:10,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:10,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:10,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:10,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:10,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... [2020-08-22 16:56:10,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:10,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:10,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:10,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:10,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 16:56:10,329 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 16:56:10,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 16:56:10,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 16:56:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:56:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:10,734 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:10,734 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 16:56:10,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:10 BoogieIcfgContainer [2020-08-22 16:56:10,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:10,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:10,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:10,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:10,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:09" (1/3) ... [2020-08-22 16:56:10,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc17362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:10, skipping insertion in model container [2020-08-22 16:56:10,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:10" (2/3) ... [2020-08-22 16:56:10,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc17362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:10, skipping insertion in model container [2020-08-22 16:56:10,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:10" (3/3) ... [2020-08-22 16:56:10,762 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 16:56:10,770 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:10,778 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:10,791 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:10,812 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:10,813 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:10,813 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:10,813 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:10,813 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:10,813 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:10,813 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:10,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 16:56:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:56:10,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:10,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:10,843 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-22 16:56:10,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:10,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000933555] [2020-08-22 16:56:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:11,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000933555] [2020-08-22 16:56:11,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:11,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:11,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136442627] [2020-08-22 16:56:11,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:11,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:11,075 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-22 16:56:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:11,387 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-22 16:56:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:11,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 16:56:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:11,400 INFO L225 Difference]: With dead ends: 150 [2020-08-22 16:56:11,400 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 16:56:11,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 16:56:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-22 16:56:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:56:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-22 16:56:11,460 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-22 16:56:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:11,461 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-22 16:56:11,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-22 16:56:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:56:11,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:11,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:11,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:11,463 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-22 16:56:11,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:11,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149879080] [2020-08-22 16:56:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:11,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149879080] [2020-08-22 16:56:11,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949622754] [2020-08-22 16:56:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -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 [2020-08-22 16:56:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:11,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:11,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-08-22 16:56:11,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431444406] [2020-08-22 16:56:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:56:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:56:11,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:56:11,677 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 6 states. [2020-08-22 16:56:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:11,959 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-22 16:56:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:56:11,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 16:56:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:11,962 INFO L225 Difference]: With dead ends: 170 [2020-08-22 16:56:11,962 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 16:56:11,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:56:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 16:56:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-22 16:56:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 16:56:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-22 16:56:11,977 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-22 16:56:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:11,977 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-22 16:56:11,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:56:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-22 16:56:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:56:11,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:11,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:12,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:12,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:12,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-22 16:56:12,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:12,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325742735] [2020-08-22 16:56:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:12,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325742735] [2020-08-22 16:56:12,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17442327] [2020-08-22 16:56:12,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:12,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:56:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:12,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:56:12,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:12,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-08-22 16:56:12,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095963179] [2020-08-22 16:56:12,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:12,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:12,367 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 4 states. [2020-08-22 16:56:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:12,409 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2020-08-22 16:56:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:12,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-22 16:56:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:12,411 INFO L225 Difference]: With dead ends: 112 [2020-08-22 16:56:12,411 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:56:12,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:12,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:56:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 16:56:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 16:56:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-08-22 16:56:12,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 18 [2020-08-22 16:56:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:12,421 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-08-22 16:56:12,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-08-22 16:56:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:56:12,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:12,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:12,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:12,640 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1841898364, now seen corresponding path program 1 times [2020-08-22 16:56:12,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:12,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413981557] [2020-08-22 16:56:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:56:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 16:56:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:12,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413981557] [2020-08-22 16:56:12,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552478548] [2020-08-22 16:56:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2020-08-22 16:56:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:12,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-08-22 16:56:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:56:12,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:12,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-08-22 16:56:12,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717154601] [2020-08-22 16:56:12,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:12,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:12,809 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 3 states. [2020-08-22 16:56:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:12,833 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-08-22 16:56:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:12,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-08-22 16:56:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:12,835 INFO L225 Difference]: With dead ends: 125 [2020-08-22 16:56:12,835 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 16:56:12,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 16:56:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-08-22 16:56:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 16:56:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-08-22 16:56:12,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 37 [2020-08-22 16:56:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:12,846 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-08-22 16:56:12,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-08-22 16:56:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 16:56:12,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:12,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:13,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:13,062 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash 581153498, now seen corresponding path program 1 times [2020-08-22 16:56:13,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:13,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029647814] [2020-08-22 16:56:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 16:56:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:56:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:13,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029647814] [2020-08-22 16:56:13,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698628528] [2020-08-22 16:56:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -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 [2020-08-22 16:56:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:56:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:13,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:13,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-08-22 16:56:13,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062776280] [2020-08-22 16:56:13,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:56:13,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:56:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:56:13,279 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 8 states. [2020-08-22 16:56:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:13,581 INFO L93 Difference]: Finished difference Result 179 states and 230 transitions. [2020-08-22 16:56:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:56:13,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-08-22 16:56:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:13,584 INFO L225 Difference]: With dead ends: 179 [2020-08-22 16:56:13,584 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 16:56:13,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 16:56:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2020-08-22 16:56:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 16:56:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-08-22 16:56:13,596 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 39 [2020-08-22 16:56:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:13,597 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-08-22 16:56:13,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:56:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-08-22 16:56:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 16:56:13,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:13,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:13,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:13,814 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash -822197896, now seen corresponding path program 2 times [2020-08-22 16:56:13,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:13,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116443353] [2020-08-22 16:56:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 16:56:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:56:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:13,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116443353] [2020-08-22 16:56:13,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422957098] [2020-08-22 16:56:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:13,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:56:13,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:56:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 16:56:14,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:14,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2020-08-22 16:56:14,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325103233] [2020-08-22 16:56:14,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:56:14,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:56:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:56:14,054 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 8 states. [2020-08-22 16:56:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:14,213 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-08-22 16:56:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:56:14,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-22 16:56:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:14,215 INFO L225 Difference]: With dead ends: 129 [2020-08-22 16:56:14,215 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 16:56:14,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:56:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 16:56:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-08-22 16:56:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 16:56:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-08-22 16:56:14,225 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2020-08-22 16:56:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:14,226 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-08-22 16:56:14,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:56:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-08-22 16:56:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 16:56:14,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:14,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:14,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:56:14,442 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:14,443 INFO L82 PathProgramCache]: Analyzing trace with hash -665199112, now seen corresponding path program 1 times [2020-08-22 16:56:14,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:14,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877369815] [2020-08-22 16:56:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 16:56:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:56:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 16:56:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:56:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 16:56:14,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877369815] [2020-08-22 16:56:14,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369762042] [2020-08-22 16:56:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -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 [2020-08-22 16:56:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:56:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 16:56:14,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:14,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-08-22 16:56:14,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443350210] [2020-08-22 16:56:14,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:56:14,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:56:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:14,663 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 9 states. [2020-08-22 16:56:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:14,998 INFO L93 Difference]: Finished difference Result 260 states and 340 transitions. [2020-08-22 16:56:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:56:14,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 16:56:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:15,001 INFO L225 Difference]: With dead ends: 260 [2020-08-22 16:56:15,002 INFO L226 Difference]: Without dead ends: 198 [2020-08-22 16:56:15,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:56:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-22 16:56:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 77. [2020-08-22 16:56:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 16:56:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-08-22 16:56:15,015 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 58 [2020-08-22 16:56:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:15,015 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-08-22 16:56:15,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:56:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-08-22 16:56:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 16:56:15,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:15,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:15,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,228 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -997532006, now seen corresponding path program 2 times [2020-08-22 16:56:15,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:15,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426607781] [2020-08-22 16:56:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:56:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:56:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:56:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:56:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-22 16:56:15,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426607781] [2020-08-22 16:56:15,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66222115] [2020-08-22 16:56:15,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:15,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-08-22 16:56:15,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:56:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 16:56:15,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:15,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2020-08-22 16:56:15,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987383493] [2020-08-22 16:56:15,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:56:15,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:56:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:56:15,506 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 10 states. [2020-08-22 16:56:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:15,901 INFO L93 Difference]: Finished difference Result 216 states and 294 transitions. [2020-08-22 16:56:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:56:15,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-08-22 16:56:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:15,908 INFO L225 Difference]: With dead ends: 216 [2020-08-22 16:56:15,908 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 16:56:15,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:56:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 16:56:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 90. [2020-08-22 16:56:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 16:56:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-08-22 16:56:15,937 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 60 [2020-08-22 16:56:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:15,938 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-08-22 16:56:15,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:56:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-08-22 16:56:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 16:56:15,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:15,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:16,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:16,143 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 420057297, now seen corresponding path program 1 times [2020-08-22 16:56:16,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:16,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821094105] [2020-08-22 16:56:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:56:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:56:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:56:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 16:56:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-08-22 16:56:16,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821094105] [2020-08-22 16:56:16,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138174273] [2020-08-22 16:56:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -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 [2020-08-22 16:56:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:56:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 16:56:16,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:16,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-08-22 16:56:16,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168163077] [2020-08-22 16:56:16,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:56:16,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:16,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:56:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:56:16,368 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 11 states. [2020-08-22 16:56:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:17,078 INFO L93 Difference]: Finished difference Result 528 states and 725 transitions. [2020-08-22 16:56:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:56:17,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 16:56:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:17,083 INFO L225 Difference]: With dead ends: 528 [2020-08-22 16:56:17,084 INFO L226 Difference]: Without dead ends: 453 [2020-08-22 16:56:17,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:56:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-08-22 16:56:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 94. [2020-08-22 16:56:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 16:56:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-08-22 16:56:17,109 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 60 [2020-08-22 16:56:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:17,109 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-08-22 16:56:17,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:56:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-08-22 16:56:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 16:56:17,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:17,111 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:17,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:56:17,326 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1850595157, now seen corresponding path program 2 times [2020-08-22 16:56:17,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:17,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626766430] [2020-08-22 16:56:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:56:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:56:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 16:56:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 16:56:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 16:56:17,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626766430] [2020-08-22 16:56:17,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133814407] [2020-08-22 16:56:17,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:17,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:17,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:17,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:56:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 16:56:17,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:17,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-08-22 16:56:17,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368454630] [2020-08-22 16:56:17,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:56:17,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:17,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:56:17,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:56:17,592 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 11 states. [2020-08-22 16:56:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:18,012 INFO L93 Difference]: Finished difference Result 384 states and 524 transitions. [2020-08-22 16:56:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:56:18,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-08-22 16:56:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:18,016 INFO L225 Difference]: With dead ends: 384 [2020-08-22 16:56:18,016 INFO L226 Difference]: Without dead ends: 307 [2020-08-22 16:56:18,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:56:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-08-22 16:56:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 96. [2020-08-22 16:56:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 16:56:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-08-22 16:56:18,032 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 64 [2020-08-22 16:56:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:18,032 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-08-22 16:56:18,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:56:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-08-22 16:56:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 16:56:18,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:18,034 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:18,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:18,249 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash 728782455, now seen corresponding path program 3 times [2020-08-22 16:56:18,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:18,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358583163] [2020-08-22 16:56:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:56:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:56:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:56:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 16:56:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 16:56:18,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358583163] [2020-08-22 16:56:18,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889123479] [2020-08-22 16:56:18,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:18,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:56:18,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:18,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:56:18,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:18,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2020-08-22 16:56:18,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930029942] [2020-08-22 16:56:18,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:18,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:56:18,578 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 7 states. [2020-08-22 16:56:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:18,686 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2020-08-22 16:56:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:56:18,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-22 16:56:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:18,688 INFO L225 Difference]: With dead ends: 185 [2020-08-22 16:56:18,689 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 16:56:18,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:56:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 16:56:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-08-22 16:56:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 16:56:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-08-22 16:56:18,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 66 [2020-08-22 16:56:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:18,699 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-08-22 16:56:18,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-08-22 16:56:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 16:56:18,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:18,701 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:18,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:18,915 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1402871403, now seen corresponding path program 1 times [2020-08-22 16:56:18,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:18,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77077708] [2020-08-22 16:56:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:18,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:56:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:56:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 16:56:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:56:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:19,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77077708] [2020-08-22 16:56:19,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849949114] [2020-08-22 16:56:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:19,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:19,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2020-08-22 16:56:19,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847864963] [2020-08-22 16:56:19,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:56:19,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:56:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:56:19,123 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 12 states. [2020-08-22 16:56:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:19,668 INFO L93 Difference]: Finished difference Result 404 states and 543 transitions. [2020-08-22 16:56:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:56:19,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-08-22 16:56:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:19,671 INFO L225 Difference]: With dead ends: 404 [2020-08-22 16:56:19,672 INFO L226 Difference]: Without dead ends: 323 [2020-08-22 16:56:19,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:56:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-08-22 16:56:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 102. [2020-08-22 16:56:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 16:56:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-08-22 16:56:19,687 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 69 [2020-08-22 16:56:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:19,687 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-08-22 16:56:19,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:56:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2020-08-22 16:56:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 16:56:19,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:19,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:19,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:56:19,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -973371469, now seen corresponding path program 2 times [2020-08-22 16:56:19,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:19,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925707274] [2020-08-22 16:56:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 16:56:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 16:56:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:56:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 16:56:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925707274] [2020-08-22 16:56:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75649409] [2020-08-22 16:56:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:20,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:20,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:56:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:20,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2020-08-22 16:56:20,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925589854] [2020-08-22 16:56:20,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:56:20,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:56:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:56:20,109 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand 13 states. [2020-08-22 16:56:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:20,567 INFO L93 Difference]: Finished difference Result 440 states and 594 transitions. [2020-08-22 16:56:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:56:20,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-08-22 16:56:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:20,573 INFO L225 Difference]: With dead ends: 440 [2020-08-22 16:56:20,573 INFO L226 Difference]: Without dead ends: 359 [2020-08-22 16:56:20,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-08-22 16:56:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 104. [2020-08-22 16:56:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 16:56:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2020-08-22 16:56:20,588 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 71 [2020-08-22 16:56:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:20,588 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2020-08-22 16:56:20,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:56:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2020-08-22 16:56:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:56:20,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:20,590 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:20,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:56:20,792 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -540795311, now seen corresponding path program 3 times [2020-08-22 16:56:20,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:20,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398529909] [2020-08-22 16:56:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:56:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 16:56:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 16:56:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 16:56:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 16:56:20,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398529909] [2020-08-22 16:56:20,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831095836] [2020-08-22 16:56:20,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:21,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:56:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:56:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-08-22 16:56:21,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:21,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2020-08-22 16:56:21,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50743318] [2020-08-22 16:56:21,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:21,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:21,052 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand 4 states. [2020-08-22 16:56:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:21,067 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2020-08-22 16:56:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:21,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-08-22 16:56:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:21,068 INFO L225 Difference]: With dead ends: 172 [2020-08-22 16:56:21,069 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 16:56:21,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 16:56:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-08-22 16:56:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 16:56:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-08-22 16:56:21,079 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 73 [2020-08-22 16:56:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:21,079 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-08-22 16:56:21,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-08-22 16:56:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:56:21,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:21,081 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:21,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:56:21,294 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash 416452360, now seen corresponding path program 1 times [2020-08-22 16:56:21,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:21,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075725715] [2020-08-22 16:56:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 16:56:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 16:56:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 16:56:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 16:56:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:56:21,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075725715] [2020-08-22 16:56:21,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175914548] [2020-08-22 16:56:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:56:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:56:21,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:21,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-08-22 16:56:21,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539492361] [2020-08-22 16:56:21,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:56:21,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:56:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:56:21,526 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 14 states. [2020-08-22 16:56:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:22,130 INFO L93 Difference]: Finished difference Result 480 states and 634 transitions. [2020-08-22 16:56:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:56:22,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-08-22 16:56:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:22,134 INFO L225 Difference]: With dead ends: 480 [2020-08-22 16:56:22,134 INFO L226 Difference]: Without dead ends: 396 [2020-08-22 16:56:22,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:56:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-08-22 16:56:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 109. [2020-08-22 16:56:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 16:56:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-08-22 16:56:22,157 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 73 [2020-08-22 16:56:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:22,157 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-08-22 16:56:22,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:56:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-08-22 16:56:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 16:56:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:22,159 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:22,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:22,374 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -489687514, now seen corresponding path program 2 times [2020-08-22 16:56:22,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:22,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630459581] [2020-08-22 16:56:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:56:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 16:56:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 16:56:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 16:56:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:56:22,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630459581] [2020-08-22 16:56:22,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457983953] [2020-08-22 16:56:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:56:22,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:56:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:22,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:56:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:56:22,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:56:22,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-08-22 16:56:22,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103742955] [2020-08-22 16:56:22,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:56:22,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:56:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:56:22,676 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 15 states. [2020-08-22 16:56:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:23,299 INFO L93 Difference]: Finished difference Result 516 states and 684 transitions. [2020-08-22 16:56:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:56:23,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-08-22 16:56:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:23,303 INFO L225 Difference]: With dead ends: 516 [2020-08-22 16:56:23,303 INFO L226 Difference]: Without dead ends: 432 [2020-08-22 16:56:23,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:56:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-08-22 16:56:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 111. [2020-08-22 16:56:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 16:56:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-08-22 16:56:23,320 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 75 [2020-08-22 16:56:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:23,320 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-08-22 16:56:23,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:56:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-08-22 16:56:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 16:56:23,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:23,322 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:23,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:56:23,535 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 588254660, now seen corresponding path program 3 times [2020-08-22 16:56:23,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:23,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627162914] [2020-08-22 16:56:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 16:56:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:56:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 16:56:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 16:56:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 16:56:23,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627162914] [2020-08-22 16:56:23,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185298720] [2020-08-22 16:56:23,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:23,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:56:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:56:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:56:23,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-22 16:56:23,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:23,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2020-08-22 16:56:23,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336638902] [2020-08-22 16:56:23,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:56:23,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:23,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:56:23,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:56:23,821 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 5 states. [2020-08-22 16:56:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:23,864 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2020-08-22 16:56:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:56:23,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-08-22 16:56:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:23,865 INFO L225 Difference]: With dead ends: 131 [2020-08-22 16:56:23,865 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:56:23,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:56:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:56:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:56:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:56:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:56:23,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2020-08-22 16:56:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:23,867 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:56:23,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:56:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:56:23,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:56:24,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:56:24,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:56:24,567 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 16:56:24,567 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 16:56:24,567 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-22 16:56:24,567 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 16:56:24,568 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-22 16:56:24,568 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (or (not (<= |elem_exists_#in~size| 0)) (and (<= 0 elem_exists_~i~0) (<= elem_exists_~size |elem_exists_#in~size|))) [2020-08-22 16:56:24,568 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-22 16:56:24,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:56:24,570 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 16:56:24,571 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:56:24,571 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-22 16:56:24,571 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-22 16:56:24,571 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-22 16:56:24,571 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:56:24,572 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:56:24,572 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:56:24,572 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:56:24,572 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-22 16:56:24,572 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-22 16:56:24,572 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-22 16:56:24,573 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-22 16:56:24,573 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-08-22 16:56:24,573 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-22 16:56:24,573 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-08-22 16:56:24,574 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-22 16:56:24,574 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-22 16:56:24,574 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-08-22 16:56:24,576 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-22 16:56:24,576 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-22 16:56:24,576 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-22 16:56:24,576 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-22 16:56:24,576 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-22 16:56:24,576 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-22 16:56:24,576 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-22 16:56:24,577 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-22 16:56:24,578 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-22 16:56:24,578 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-22 16:56:24,578 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 16:56:24,578 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-22 16:56:24,579 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (<= 0 main_~x~0)) [2020-08-22 16:56:24,579 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-22 16:56:24,581 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-22 16:56:24,581 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-08-22 16:56:24,581 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-22 16:56:24,582 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 0) (= main_~x~0 0)) [2020-08-22 16:56:24,583 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-22 16:56:24,583 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-22 16:56:24,583 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-22 16:56:24,583 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-22 16:56:24,583 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~n~0 1)) [2020-08-22 16:56:24,584 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-22 16:56:24,584 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-22 16:56:24,584 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-22 16:56:24,584 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-22 16:56:24,584 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~n~0 1)) [2020-08-22 16:56:24,586 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-22 16:56:24,586 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-22 16:56:24,586 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-22 16:56:24,586 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-22 16:56:24,586 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-22 16:56:24,588 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-22 16:56:24,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:24 BoogieIcfgContainer [2020-08-22 16:56:24,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:24,632 INFO L168 Benchmark]: Toolchain (without parser) took 14782.03 ms. Allocated memory was 144.2 MB in the beginning and 347.6 MB in the end (delta: 203.4 MB). Free memory was 102.1 MB in the beginning and 217.1 MB in the end (delta: -115.0 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,633 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,635 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.81 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 180.6 MB in the end (delta: -78.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,635 INFO L168 Benchmark]: Boogie Preprocessor took 58.71 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,636 INFO L168 Benchmark]: RCFGBuilder took 478.30 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 154.4 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,637 INFO L168 Benchmark]: TraceAbstraction took 13872.90 ms. Allocated memory was 201.9 MB in the beginning and 347.6 MB in the end (delta: 145.8 MB). Free memory was 153.8 MB in the beginning and 217.1 MB in the end (delta: -63.4 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:24,650 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.81 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 180.6 MB in the end (delta: -78.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.71 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 478.30 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 154.4 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13872.90 ms. Allocated memory was 201.9 MB in the beginning and 347.6 MB in the end (delta: 145.8 MB). Free memory was 153.8 MB in the beginning and 217.1 MB in the end (delta: -63.4 MB). Peak memory consumption was 82.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && 0 <= x - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: !(\old(size) <= 0) || (0 <= i && size <= \old(size)) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 0 <= x && n <= 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (0 <= n && n <= 0) && x == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: (0 <= x && 1 <= y) && n <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 17, TraceHistogramMax: 10, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1151 SDtfs, 2036 SDslu, 3187 SDs, 0 SdLazy, 3795 SolverSat, 1045 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1191 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 2057 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 162 PreInvPairs, 186 NumberOfFragments, 117 HoareAnnotationTreeSize, 162 FomulaSimplifications, 3537 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 22 FomulaSimplificationsInter, 211 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 1808 NumberOfCodeBlocks, 1715 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1775 ConstructedInterpolants, 0 QuantifiedInterpolants, 170337 SizeOfPredicates, 31 NumberOfNonLiveVariables, 3190 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 33 InterpolantComputations, 8 PerfectInterpolantSequences, 713/1486 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...