/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:35:42,403 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:35:42,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:35:42,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:35:42,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:35:42,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:35:42,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:35:42,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:35:42,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:35:42,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:35:42,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:35:42,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:35:42,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:35:42,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:35:42,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:35:42,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:35:42,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:35:42,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:35:42,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:35:42,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:35:42,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:35:42,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:35:42,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:35:42,531 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:35:42,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:35:42,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:35:42,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:35:42,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:35:42,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:35:42,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:35:42,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:35:42,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:35:42,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:35:42,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:35:42,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:35:42,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:35:42,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:35:42,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:35:42,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:35:42,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:35:42,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:42,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:35:42,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:35:42,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:35:42,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:35:42,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:35:42,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:35:42,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:35:42,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:35:42,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:35:42,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:35:42,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:35:42,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:35:42,868 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:35:42,871 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-20 03:35:42,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13b71d6bd/a23ca9ecf5bc4ae59dc760c36de95060/FLAGd1b651df7 [2020-07-20 03:35:43,349 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:35:43,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-20 03:35:43,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13b71d6bd/a23ca9ecf5bc4ae59dc760c36de95060/FLAGd1b651df7 [2020-07-20 03:35:43,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13b71d6bd/a23ca9ecf5bc4ae59dc760c36de95060 [2020-07-20 03:35:43,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:35:43,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:35:43,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:43,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:35:43,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:35:43,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:43" (1/1) ... [2020-07-20 03:35:43,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121f1e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:43, skipping insertion in model container [2020-07-20 03:35:43,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:43" (1/1) ... [2020-07-20 03:35:43,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:35:43,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:35:43,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:43,985 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:35:44,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:44,021 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:35:44,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44 WrapperNode [2020-07-20 03:35:44,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:44,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:35:44,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:35:44,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:35:44,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:35:44,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:35:44,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:35:44,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:35:44,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:35:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:35:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 03:35:44,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:35:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:35:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 03:35:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:35:44,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:35:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:35:44,360 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:35:44,361 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:35:44,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:44 BoogieIcfgContainer [2020-07-20 03:35:44,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:35:44,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:35:44,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:35:44,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:35:44,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:35:43" (1/3) ... [2020-07-20 03:35:44,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511c3d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:44, skipping insertion in model container [2020-07-20 03:35:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44" (2/3) ... [2020-07-20 03:35:44,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511c3d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:44, skipping insertion in model container [2020-07-20 03:35:44,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:44" (3/3) ... [2020-07-20 03:35:44,373 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-07-20 03:35:44,384 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:35:44,392 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:35:44,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:35:44,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:35:44,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:35:44,432 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:35:44,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:35:44,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:35:44,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:35:44,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:35:44,432 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:35:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 03:35:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:35:44,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:44,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:44,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:44,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 03:35:44,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:44,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439656816] [2020-07-20 03:35:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:35:44,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439656816] [2020-07-20 03:35:44,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:35:44,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:35:44,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564158102] [2020-07-20 03:35:44,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:35:44,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:44,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:35:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:35:44,700 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 03:35:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:44,796 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 03:35:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:35:44,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:35:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:44,817 INFO L225 Difference]: With dead ends: 30 [2020-07-20 03:35:44,817 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:35:44,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:35:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:35:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 03:35:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 03:35:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 03:35:44,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 03:35:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:44,879 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 03:35:44,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:35:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 03:35:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:35:44,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:44,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:44,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:35:44,883 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 03:35:44,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:44,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588184090] [2020-07-20 03:35:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:45,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588184090] [2020-07-20 03:35:45,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244521075] [2020-07-20 03:35:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50804907 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:45,103 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50804907 issued 2 check-sat command(s) [2020-07-20 03:35:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:35:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:45,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:45,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 03:35:45,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448992435] [2020-07-20 03:35:45,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:35:45,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:45,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:35:45,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:35:45,170 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 03:35:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:45,241 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 03:35:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:35:45,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 03:35:45,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:45,243 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:35:45,243 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:35:45,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:35:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:35:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:35:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:35:45,252 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 03:35:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:45,253 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:35:45,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:35:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:35:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:35:45,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:45,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:45,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:35:45,468 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 03:35:45,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:45,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517733805] [2020-07-20 03:35:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:45,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517733805] [2020-07-20 03:35:45,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788346356] [2020-07-20 03:35:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15d7cfc5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:45,699 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15d7cfc5 issued 2 check-sat command(s) [2020-07-20 03:35:45,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:35:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:45,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:45,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 03:35:45,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334964069] [2020-07-20 03:35:45,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:35:45,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:35:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:35:45,751 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 03:35:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:45,850 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 03:35:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:35:45,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 03:35:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:45,852 INFO L225 Difference]: With dead ends: 28 [2020-07-20 03:35:45,852 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:35:45,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:35:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 03:35:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:35:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 03:35:45,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 03:35:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:45,860 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 03:35:45,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:35:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 03:35:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:35:45,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:45,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:46,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:46,078 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 03:35:46,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:46,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111073449] [2020-07-20 03:35:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:46,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111073449] [2020-07-20 03:35:46,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653203427] [2020-07-20 03:35:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ff52b4e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,351 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ff52b4e issued 2 check-sat command(s) [2020-07-20 03:35:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:46,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:35:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:46,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:46,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 03:35:46,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68361341] [2020-07-20 03:35:46,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:35:46,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:35:46,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:46,391 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 03:35:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:46,493 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 03:35:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:35:46,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 03:35:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:46,495 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:35:46,496 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:35:46,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:35:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:35:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:35:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:35:46,503 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 03:35:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:46,504 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:35:46,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:35:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:35:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:35:46,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:46,506 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:46,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,707 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 03:35:46,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:46,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764563945] [2020-07-20 03:35:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:46,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764563945] [2020-07-20 03:35:46,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484912488] [2020-07-20 03:35:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13215a3c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,930 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13215a3c issued 2 check-sat command(s) [2020-07-20 03:35:46,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:35:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:46,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:46,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 03:35:46,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491726408] [2020-07-20 03:35:46,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:35:46,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:35:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:46,993 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 03:35:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:47,094 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 03:35:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:35:47,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 03:35:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:47,096 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:35:47,096 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:35:47,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:35:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:35:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:35:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 03:35:47,103 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 03:35:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:47,104 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 03:35:47,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:35:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 03:35:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 03:35:47,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:47,106 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:47,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:47,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 03:35:47,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:47,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90197660] [2020-07-20 03:35:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:47,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90197660] [2020-07-20 03:35:47,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213056426] [2020-07-20 03:35:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58a52cd8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:47,702 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58a52cd8 issued 2 check-sat command(s) [2020-07-20 03:35:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:35:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:47,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:47,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 03:35:47,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331541564] [2020-07-20 03:35:47,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:35:47,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:35:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:47,758 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 03:35:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:47,875 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 03:35:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:35:47,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 03:35:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:47,877 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:35:47,877 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:35:47,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:35:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:35:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:35:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:35:47,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 03:35:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:47,885 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:35:47,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:35:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:35:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:35:47,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:47,887 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:48,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:35:48,088 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 03:35:48,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:48,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40056899] [2020-07-20 03:35:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:48,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40056899] [2020-07-20 03:35:48,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440856484] [2020-07-20 03:35:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28d59764 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:48,318 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28d59764 issued 2 check-sat command(s) [2020-07-20 03:35:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:35:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:48,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:48,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 03:35:48,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235920590] [2020-07-20 03:35:48,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:35:48,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:35:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:48,362 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 03:35:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:48,491 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 03:35:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:35:48,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 03:35:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:48,493 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:35:48,493 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:35:48,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:35:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 03:35:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:35:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 03:35:48,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 03:35:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:48,501 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 03:35:48,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:35:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 03:35:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 03:35:48,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:48,502 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:48,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:48,717 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 03:35:48,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:48,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652026952] [2020-07-20 03:35:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:48,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652026952] [2020-07-20 03:35:48,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574186741] [2020-07-20 03:35:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ddd506b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:48,995 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ddd506b issued 2 check-sat command(s) [2020-07-20 03:35:48,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:35:49,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:49,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:49,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 03:35:49,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252798308] [2020-07-20 03:35:49,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:35:49,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:35:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:49,075 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 03:35:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:49,236 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 03:35:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:35:49,237 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 03:35:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:49,238 INFO L225 Difference]: With dead ends: 43 [2020-07-20 03:35:49,239 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:35:49,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:35:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:35:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:35:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:35:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:35:49,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 03:35:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:49,257 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:35:49,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:35:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:35:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:35:49,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:49,260 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:49,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:49,461 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 03:35:49,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:49,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714063414] [2020-07-20 03:35:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714063414] [2020-07-20 03:35:49,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948180447] [2020-07-20 03:35:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c1aaea3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:49,872 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c1aaea3 issued 2 check-sat command(s) [2020-07-20 03:35:49,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:35:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:49,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:49,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 03:35:49,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278923737] [2020-07-20 03:35:49,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:35:49,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:35:49,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:49,917 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 03:35:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:50,054 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 03:35:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:35:50,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 03:35:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:50,056 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:35:50,057 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:35:50,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:35:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:35:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 03:35:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:35:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 03:35:50,064 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 03:35:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:50,065 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 03:35:50,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:35:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 03:35:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:35:50,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:50,066 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:50,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:35:50,281 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 03:35:50,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:50,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548785637] [2020-07-20 03:35:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:50,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548785637] [2020-07-20 03:35:50,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056312680] [2020-07-20 03:35:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f9cd8a4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:50,705 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f9cd8a4 issued 2 check-sat command(s) [2020-07-20 03:35:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:35:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:50,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:50,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 03:35:50,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17804285] [2020-07-20 03:35:50,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:35:50,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:35:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:50,776 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 03:35:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:50,933 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 03:35:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:35:50,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 03:35:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:50,935 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:35:50,935 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 03:35:50,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:35:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 03:35:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 03:35:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:35:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:35:50,950 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 03:35:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:50,950 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:35:50,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:35:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:35:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:35:50,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:50,952 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:51,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:51,171 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 03:35:51,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:51,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569496679] [2020-07-20 03:35:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569496679] [2020-07-20 03:35:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332855531] [2020-07-20 03:35:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c3f47b 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 [2020-07-20 03:35:51,535 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c3f47b issued 2 check-sat command(s) [2020-07-20 03:35:51,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:35:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:51,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:51,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 03:35:51,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210257788] [2020-07-20 03:35:51,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:35:51,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:35:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:51,609 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 03:35:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:51,805 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 03:35:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:35:51,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 03:35:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:51,808 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:35:51,809 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:35:51,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-20 03:35:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:35:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:35:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:35:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 03:35:51,825 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 03:35:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:51,827 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 03:35:51,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:35:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 03:35:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 03:35:51,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:51,829 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:52,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:52,044 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 03:35:52,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:52,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148244805] [2020-07-20 03:35:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:52,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148244805] [2020-07-20 03:35:52,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275003073] [2020-07-20 03:35:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e3e573e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:52,486 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e3e573e issued 2 check-sat command(s) [2020-07-20 03:35:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:35:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:52,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:52,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 03:35:52,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595101582] [2020-07-20 03:35:52,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:35:52,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:35:52,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:52,547 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 03:35:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:52,748 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 03:35:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:35:52,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 03:35:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:52,750 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:35:52,750 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:35:52,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-20 03:35:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:35:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:35:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:35:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:35:52,767 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 03:35:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:52,767 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:35:52,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:35:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:35:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:35:52,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:52,770 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:52,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:35:52,986 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 03:35:52,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:52,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233159165] [2020-07-20 03:35:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:53,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233159165] [2020-07-20 03:35:53,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804533380] [2020-07-20 03:35:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1297c0ab 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 [2020-07-20 03:35:53,498 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1297c0ab issued 2 check-sat command(s) [2020-07-20 03:35:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:35:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:53,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:53,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 03:35:53,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598428129] [2020-07-20 03:35:53,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:35:53,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:35:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:53,540 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 03:35:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:53,732 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 03:35:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:35:53,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 03:35:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:53,734 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:35:53,734 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:35:53,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-20 03:35:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:35:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:35:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:35:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 03:35:53,741 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 03:35:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:53,743 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 03:35:53,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:35:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 03:35:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 03:35:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:53,745 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:53,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:35:53,946 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 03:35:53,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:53,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32216526] [2020-07-20 03:35:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:54,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32216526] [2020-07-20 03:35:54,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463344655] [2020-07-20 03:35:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c95edd2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:54,507 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c95edd2 issued 2 check-sat command(s) [2020-07-20 03:35:54,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:35:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:54,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:54,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 03:35:54,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713827260] [2020-07-20 03:35:54,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:35:54,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:35:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:54,551 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 03:35:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:54,738 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 03:35:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:35:54,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 03:35:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:54,740 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:35:54,740 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:35:54,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 03:35:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:35:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:35:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:35:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:35:54,748 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 03:35:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:54,748 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:35:54,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:35:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:35:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 03:35:54,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:54,750 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:54,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:35:54,966 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 03:35:54,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054867105] [2020-07-20 03:35:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:55,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054867105] [2020-07-20 03:35:55,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035809276] [2020-07-20 03:35:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4864eb31 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 [2020-07-20 03:35:55,614 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4864eb31 issued 2 check-sat command(s) [2020-07-20 03:35:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 03:35:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:55,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:55,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 03:35:55,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194536912] [2020-07-20 03:35:55,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:35:55,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:35:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:55,676 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 03:35:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:55,910 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 03:35:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:35:55,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 03:35:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:55,912 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:35:55,912 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:35:55,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 03:35:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:35:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 03:35:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:35:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 03:35:55,928 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 03:35:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:55,930 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 03:35:55,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:35:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 03:35:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 03:35:55,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:55,933 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:56,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:56,141 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 03:35:56,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:56,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971730028] [2020-07-20 03:35:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bac9f96 [2020-07-20 03:35:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-07-20 03:35:57,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971730028] [2020-07-20 03:35:57,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648088851] [2020-07-20 03:35:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a548362 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:57,990 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a548362 issued 4 check-sat command(s) [2020-07-20 03:35:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:57,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 165 conjunts are in the unsatisfiable core [2020-07-20 03:35:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:35:59,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:59,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2020-07-20 03:35:59,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028940769] [2020-07-20 03:35:59,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-20 03:35:59,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:59,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-20 03:35:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 03:35:59,926 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 72 states. [2020-07-20 03:36:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:03,108 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-07-20 03:36:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 03:36:03,109 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 103 [2020-07-20 03:36:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:03,110 INFO L225 Difference]: With dead ends: 63 [2020-07-20 03:36:03,110 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:36:03,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1283, Invalid=9847, Unknown=0, NotChecked=0, Total=11130 [2020-07-20 03:36:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:36:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:36:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:36:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:36:03,116 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-07-20 03:36:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:03,116 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:36:03,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-20 03:36:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:36:03,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:36:03,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:36:03,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:36:03,363 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:36:03,364 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:03,364 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:36:03,364 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:36:03,364 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:36:03,364 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:36:03,364 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-20 03:36:03,365 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-20 03:36:03,365 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-20 03:36:03,365 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-20 03:36:03,365 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-20 03:36:03,365 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-20 03:36:03,365 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-20 03:36:03,365 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 03:36:03,366 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 03:36:03,366 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-20 03:36:03,366 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 03:36:03,366 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= 15 main_~a~0) (<= main_~a~0 15)) [2020-07-20 03:36:03,366 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-20 03:36:03,366 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-20 03:36:03,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:36:03 BoogieIcfgContainer [2020-07-20 03:36:03,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:36:03,376 INFO L168 Benchmark]: Toolchain (without parser) took 19634.54 ms. Allocated memory was 139.5 MB in the beginning and 424.1 MB in the end (delta: 284.7 MB). Free memory was 104.4 MB in the beginning and 106.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 282.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,376 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.46 ms. Allocated memory is still 139.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,378 INFO L168 Benchmark]: Boogie Preprocessor took 24.84 ms. Allocated memory is still 139.5 MB. Free memory was 94.7 MB in the beginning and 93.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,378 INFO L168 Benchmark]: RCFGBuilder took 317.73 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 171.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,379 INFO L168 Benchmark]: TraceAbstraction took 19007.29 ms. Allocated memory was 203.4 MB in the beginning and 424.1 MB in the end (delta: 220.7 MB). Free memory was 171.3 MB in the beginning and 106.9 MB in the end (delta: 64.4 MB). Peak memory consumption was 285.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:03,382 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.46 ms. Allocated memory is still 139.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.84 ms. Allocated memory is still 139.5 MB. Free memory was 94.7 MB in the beginning and 93.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.73 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 171.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19007.29 ms. Allocated memory was 203.4 MB in the beginning and 424.1 MB in the end (delta: 220.7 MB). Free memory was 171.3 MB in the beginning and 106.9 MB in the end (delta: 64.4 MB). Peak memory consumption was 285.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 508 SDslu, 1284 SDs, 0 SdLazy, 1491 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1560 GetRequests, 1172 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1812 ConstructedInterpolants, 0 QuantifiedInterpolants, 426582 SizeOfPredicates, 168 NumberOfNonLiveVariables, 2133 ConjunctsInSsa, 431 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...