/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_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:35:43,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:35:43,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:35:43,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:35:43,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:35:43,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:35:43,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:35:43,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:35:43,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:35:43,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:35:43,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:35:43,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:35:43,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:35:43,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:35:43,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:35:43,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:35:43,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:35:43,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:35:43,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:35:43,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:35:43,169 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 03:35:43,183 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:35:43,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:35:43,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:35:43,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:35:43,185 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:35:43,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:35:43,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:35:43,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:35:43,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:35:43,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:35:43,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:35:43,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:35:43,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:35:43,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:35:43,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:35:43,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:35:43,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:35:43,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:35:43,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:35:43,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:35:43,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:35:43,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:43,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:35:43,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:35:43,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:35:43,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:35:43,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:35:43,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:35:43,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:35:43,192 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 03:35:43,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:35:43,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:35:43,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:35:43,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:35:43,519 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:35:43,520 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-20 03:35:43,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41b3a279/94130ad5b29c43edac4f2fc62f38a5ea/FLAGd49111cb6 [2020-07-20 03:35:43,982 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:35:43,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-20 03:35:43,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41b3a279/94130ad5b29c43edac4f2fc62f38a5ea/FLAGd49111cb6 [2020-07-20 03:35:44,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b41b3a279/94130ad5b29c43edac4f2fc62f38a5ea [2020-07-20 03:35:44,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:35:44,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:35:44,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:44,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:35:44,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:35:44,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d425a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44, skipping insertion in model container [2020-07-20 03:35:44,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:44" (1/1) ... [2020-07-20 03:35:44,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:35:44,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:35:44,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:44,620 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:35:44,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:44,651 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:35:44,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:44 WrapperNode [2020-07-20 03:35:44,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:44,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:35:44,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:35:44,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:35:44,667 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 03:35:44,667 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 03:35:44,672 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 03:35:44,673 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 03:35:44,676 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 03:35:44,678 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 03:35:44,679 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 03:35:44,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:35:44,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:35:44,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:35:44,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:35:44,682 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 03:35:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:35:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:35:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 03:35:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:35:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:35:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 03:35:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:35:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:35:44,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:35:45,003 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:35:45,004 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:35:45,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:45 BoogieIcfgContainer [2020-07-20 03:35:45,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:35:45,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:35:45,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:35:45,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:35:45,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:35:44" (1/3) ... [2020-07-20 03:35:45,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f9ebaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:45, skipping insertion in model container [2020-07-20 03:35:45,015 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 03:35:45,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f9ebaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:45, skipping insertion in model container [2020-07-20 03:35:45,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:45" (3/3) ... [2020-07-20 03:35:45,017 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-07-20 03:35:45,029 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:35:45,038 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:35:45,053 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:35:45,113 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:35:45,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:35:45,113 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:35:45,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:35:45,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:35:45,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:35:45,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:35:45,115 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:35:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 03:35:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:35:45,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:45,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:45,150 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 03:35:45,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:45,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323152270] [2020-07-20 03:35:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,393 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 03:35:45,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323152270] [2020-07-20 03:35:45,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:35:45,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:35:45,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645046287] [2020-07-20 03:35:45,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:35:45,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:45,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:35:45,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:35:45,420 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 03:35:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:45,497 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 03:35:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:35:45,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:35:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:45,511 INFO L225 Difference]: With dead ends: 30 [2020-07-20 03:35:45,511 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:35:45,515 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 03:35:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:35:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 03:35:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 03:35:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 03:35:45,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 03:35:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:45,560 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 03:35:45,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:35:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 03:35:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:35:45,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:45,563 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 03:35:45,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:35:45,564 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 03:35:45,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:45,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190084874] [2020-07-20 03:35:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:45,707 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 03:35:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190084874] [2020-07-20 03:35:45,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179118714] [2020-07-20 03:35:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a99be96 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:45,755 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a99be96 issued 2 check-sat command(s) [2020-07-20 03:35:45,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:45,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:35:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:45,835 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 03:35:45,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:45,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 03:35:45,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329775426] [2020-07-20 03:35:45,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:35:45,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:35:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:35:45,845 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 03:35:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:45,939 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 03:35:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:35:45,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 03:35:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:45,942 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:35:45,942 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:35:45,943 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 03:35:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:35:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:35:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:35:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:35:45,951 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 03:35:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:45,952 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:35:45,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:35:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:35:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:35:45,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:45,954 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 03:35:46,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:35:46,169 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 03:35:46,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:46,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473771759] [2020-07-20 03:35:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:46,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473771759] [2020-07-20 03:35:46,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820559361] [2020-07-20 03:35:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e5139f8 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 03:35:46,362 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e5139f8 issued 2 check-sat command(s) [2020-07-20 03:35:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:35:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:46,408 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 03:35:46,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:46,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 03:35:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518159562] [2020-07-20 03:35:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:35:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:35:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:35:46,413 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 03:35:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:46,499 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 03:35:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:35:46,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 03:35:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:46,501 INFO L225 Difference]: With dead ends: 28 [2020-07-20 03:35:46,501 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:35:46,502 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 03:35:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:35:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 03:35:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:35:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 03:35:46,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 03:35:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:46,510 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 03:35:46,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:35:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 03:35:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:35:46,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:46,511 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 03:35:46,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,727 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 03:35:46,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:46,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191529488] [2020-07-20 03:35:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:46,910 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 03:35:46,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191529488] [2020-07-20 03:35:46,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132822419] [2020-07-20 03:35:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75f91a45 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:46,945 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75f91a45 issued 2 check-sat command(s) [2020-07-20 03:35:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:35:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:46,974 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 03:35:46,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:46,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 03:35:46,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117451215] [2020-07-20 03:35:46,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:35:46,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:35:46,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:46,977 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 03:35:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:47,063 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 03:35:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:35:47,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 03:35:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:47,066 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:35:47,066 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:35:47,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:35:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:35:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:35:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:35:47,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 03:35:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:47,075 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:35:47,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:35:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:35:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:35:47,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:47,077 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 03:35:47,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:47,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 03:35:47,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:47,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692938146] [2020-07-20 03:35:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692938146] [2020-07-20 03:35:47,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464055452] [2020-07-20 03:35:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1068ee 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 03:35:47,520 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1068ee issued 2 check-sat command(s) [2020-07-20 03:35:47,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:47,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:35:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:47,552 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 03:35:47,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:47,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 03:35:47,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536710776] [2020-07-20 03:35:47,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:35:47,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:35:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:47,555 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 03:35:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:47,657 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 03:35:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:35:47,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 03:35:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:47,659 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:35:47,659 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:35:47,660 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 03:35:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:35:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:35:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:35:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 03:35:47,667 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 03:35:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:47,667 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 03:35:47,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:35:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 03:35:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 03:35:47,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:47,669 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 03:35:47,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:47,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 03:35:47,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:47,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178679847] [2020-07-20 03:35:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,100 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 03:35:48,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178679847] [2020-07-20 03:35:48,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854584310] [2020-07-20 03:35:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21d2e4dd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:48,140 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21d2e4dd issued 2 check-sat command(s) [2020-07-20 03:35:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:35:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:48,186 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 03:35:48,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:48,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 03:35:48,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179103724] [2020-07-20 03:35:48,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:35:48,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:48,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:35:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:48,191 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 03:35:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:48,282 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 03:35:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:35:48,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 03:35:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:48,284 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:35:48,284 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:35:48,285 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 03:35:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:35:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:35:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:35:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:35:48,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 03:35:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:48,292 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:35:48,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:35:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:35:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:35:48,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:48,294 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 03:35:48,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:35:48,496 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 03:35:48,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:48,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079469273] [2020-07-20 03:35:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:48,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079469273] [2020-07-20 03:35:48,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073568296] [2020-07-20 03:35:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@167cad1a 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 03:35:48,778 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@167cad1a issued 2 check-sat command(s) [2020-07-20 03:35:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:35:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:48,848 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 03:35:48,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:48,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 03:35:48,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243230233] [2020-07-20 03:35:48,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:35:48,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:35:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:48,852 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 03:35:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:48,985 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 03:35:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:35:48,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 03:35:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:48,986 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:35:48,986 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:35:48,987 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 03:35:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:35:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 03:35:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:35:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 03:35:48,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 03:35:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:48,997 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 03:35:49,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:35:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 03:35:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 03:35:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:49,004 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 03:35:49,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:49,221 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 03:35:49,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:49,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924487362] [2020-07-20 03:35:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,454 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 03:35:49,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924487362] [2020-07-20 03:35:49,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44463362] [2020-07-20 03:35:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69016e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:49,499 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@69016e issued 2 check-sat command(s) [2020-07-20 03:35:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:35:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:49,533 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 03:35:49,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:49,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 03:35:49,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393006968] [2020-07-20 03:35:49,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:35:49,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:35:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:49,536 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 03:35:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:49,660 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 03:35:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:35:49,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 03:35:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:49,662 INFO L225 Difference]: With dead ends: 43 [2020-07-20 03:35:49,662 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:35:49,663 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 03:35:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:35:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:35:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:35:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:35:49,669 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 03:35:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:49,669 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:35:49,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:35:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:35:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:35:49,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:49,671 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 03:35:49,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:49,886 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 03:35:49,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:49,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059099365] [2020-07-20 03:35:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:50,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059099365] [2020-07-20 03:35:50,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958961164] [2020-07-20 03:35:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@936fa94 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 03:35:50,229 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@936fa94 issued 2 check-sat command(s) [2020-07-20 03:35:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:35:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:50,290 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 03:35:50,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:50,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 03:35:50,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637197714] [2020-07-20 03:35:50,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:35:50,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:35:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:50,293 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 03:35:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:50,449 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 03:35:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:35:50,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 03:35:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:50,451 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:35:50,451 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:35:50,452 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 03:35:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:35:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 03:35:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:35:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 03:35:50,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 03:35:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:50,459 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 03:35:50,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:35:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 03:35:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:35:50,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:50,461 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 03:35:50,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:35:50,663 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 03:35:50,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:50,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347959295] [2020-07-20 03:35:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:50,951 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 03:35:50,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347959295] [2020-07-20 03:35:50,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537764305] [2020-07-20 03:35:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39f757a9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:50,993 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39f757a9 issued 2 check-sat command(s) [2020-07-20 03:35:50,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:50,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:35:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:51,036 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 03:35:51,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:51,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 03:35:51,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415438247] [2020-07-20 03:35:51,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:35:51,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:35:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:51,039 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 03:35:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:51,201 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 03:35:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:35:51,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 03:35:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:51,203 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:35:51,203 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 03:35:51,205 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 03:35:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 03:35:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 03:35:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:35:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:35:51,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 03:35:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:51,212 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:35:51,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:35:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:35:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:35:51,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:51,214 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 03:35:51,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:51,428 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 03:35:51,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:51,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548529947] [2020-07-20 03:35:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548529947] [2020-07-20 03:35:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632106191] [2020-07-20 03:35:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11a1200c 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 03:35:51,860 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11a1200c issued 2 check-sat command(s) [2020-07-20 03:35:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:35:51,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:51,926 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 03:35:51,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:51,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 03:35:51,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084070725] [2020-07-20 03:35:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:35:51,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:35:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:51,931 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 03:35:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:52,111 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 03:35:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:35:52,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 03:35:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:52,113 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:35:52,114 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:35:52,115 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 03:35:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:35:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:35:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:35:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 03:35:52,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 03:35:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:52,130 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 03:35:52,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:35:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 03:35:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 03:35:52,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:52,134 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 03:35:52,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:52,350 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 03:35:52,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:52,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799694860] [2020-07-20 03:35:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:52,855 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 03:35:52,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799694860] [2020-07-20 03:35:52,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288170408] [2020-07-20 03:35:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6545fb90 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:52,905 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6545fb90 issued 2 check-sat command(s) [2020-07-20 03:35:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:35:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:52,979 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 03:35:52,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:52,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 03:35:52,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845306801] [2020-07-20 03:35:52,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:35:52,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:35:52,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:52,983 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 03:35:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:53,193 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 03:35:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:35:53,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 03:35:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:53,194 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:35:53,195 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:35:53,199 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 03:35:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:35:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:35:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:35:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:35:53,208 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 03:35:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:53,209 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:35:53,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:35:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:35:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:35:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:53,210 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 03:35:53,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:35:53,426 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 03:35:53,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:53,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113881660] [2020-07-20 03:35:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:53,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113881660] [2020-07-20 03:35:53,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581816467] [2020-07-20 03:35:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56b62ae1 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 03:35:53,908 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56b62ae1 issued 2 check-sat command(s) [2020-07-20 03:35:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:35:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:53,957 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 03:35:53,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:53,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 03:35:53,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411789543] [2020-07-20 03:35:53,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:35:53,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:35:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:53,960 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 03:35:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:54,170 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 03:35:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:35:54,171 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 03:35:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:54,173 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:35:54,173 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:35:54,174 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 03:35:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:35:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:35:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:35:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 03:35:54,191 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 03:35:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:54,191 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 03:35:54,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:35:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 03:35:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 03:35:54,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:54,196 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 03:35:54,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:35:54,397 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 03:35:54,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:54,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928225601] [2020-07-20 03:35:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:54,921 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 03:35:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928225601] [2020-07-20 03:35:54,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096516072] [2020-07-20 03:35:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d81cccc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:54,984 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d81cccc issued 2 check-sat command(s) [2020-07-20 03:35:54,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:35:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:55,023 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 03:35:55,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:55,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 03:35:55,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516403944] [2020-07-20 03:35:55,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:35:55,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:55,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:35:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:55,026 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 03:35:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:55,250 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 03:35:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:35:55,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 03:35:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:55,253 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:35:55,253 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:35:55,255 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 03:35:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:35:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:35:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:35:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:35:55,273 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 03:35:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:55,273 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:35:55,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:35:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:35:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 03:35:55,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:55,276 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 03:35:55,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:35:55,492 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 03:35:55,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:55,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336956661] [2020-07-20 03:35:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,124 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 03:35:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336956661] [2020-07-20 03:35:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390031400] [2020-07-20 03:35:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399ee3d3 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 03:35:56,205 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@399ee3d3 issued 2 check-sat command(s) [2020-07-20 03:35:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:56,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 03:35:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:56,260 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 03:35:56,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:56,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 03:35:56,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168908407] [2020-07-20 03:35:56,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:35:56,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:35:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:56,263 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 03:35:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:56,490 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 03:35:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:35:56,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 03:35:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:56,492 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:35:56,492 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:35:56,494 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 03:35:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:35:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 03:35:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:35:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 03:35:56,505 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 03:35:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:56,506 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 03:35:56,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:35:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 03:35:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 03:35:56,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:56,508 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 03:35:56,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:56,724 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 03:35:56,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:56,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795681898] [2020-07-20 03:35:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,834 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 03:35:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,373 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 03:35:57,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795681898] [2020-07-20 03:35:57,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466831865] [2020-07-20 03:35:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a5211f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:57,441 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a5211f issued 2 check-sat command(s) [2020-07-20 03:35:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 03:35:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:57,483 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 03:35:57,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:57,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-20 03:35:57,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834483757] [2020-07-20 03:35:57,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:35:57,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:57,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:35:57,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:35:57,486 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-20 03:35:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:57,705 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 03:35:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:35:57,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-20 03:35:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:57,707 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:35:57,707 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 03:35:57,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 03:35:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 03:35:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 03:35:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 03:35:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 03:35:57,726 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 03:35:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:57,727 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 03:35:57,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:35:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 03:35:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:35:57,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:57,731 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:57,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:35:57,932 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-20 03:35:57,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:57,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059938124] [2020-07-20 03:35:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:58,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059938124] [2020-07-20 03:35:58,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306739070] [2020-07-20 03:35:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42c9f818 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:58,684 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42c9f818 issued 2 check-sat command(s) [2020-07-20 03:35:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:58,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 03:35:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:58,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:58,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-20 03:35:58,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540395341] [2020-07-20 03:35:58,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:35:58,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:35:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:35:58,732 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-20 03:35:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:58,985 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 03:35:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:35:58,985 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-20 03:35:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:58,987 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:35:58,987 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:35:58,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 03:35:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:35:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:35:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:35:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 03:35:58,997 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 03:35:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:58,998 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 03:35:58,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:35:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 03:35:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 03:35:58,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:58,999 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:59,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 03:35:59,214 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:59,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-20 03:35:59,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:59,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584679636] [2020-07-20 03:35:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:35:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:35:59,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584679636] [2020-07-20 03:35:59,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428844207] [2020-07-20 03:35:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8bd070a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:00,084 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@8bd070a issued 2 check-sat command(s) [2020-07-20 03:36:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 03:36:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:36:00,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:00,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-20 03:36:00,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190820243] [2020-07-20 03:36:00,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 03:36:00,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 03:36:00,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:36:00,161 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-20 03:36:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:00,460 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 03:36:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:36:00,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-20 03:36:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:00,462 INFO L225 Difference]: With dead ends: 73 [2020-07-20 03:36:00,462 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 03:36:00,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 03:36:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 03:36:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 03:36:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 03:36:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 03:36:00,475 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 03:36:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:00,475 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 03:36:00,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 03:36:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 03:36:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 03:36:00,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:00,477 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:00,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 03:36:00,692 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-20 03:36:00,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:00,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962500499] [2020-07-20 03:36:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:36:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:36:01,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962500499] [2020-07-20 03:36:01,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682476196] [2020-07-20 03:36:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5cd1ed06 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:01,579 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5cd1ed06 issued 2 check-sat command(s) [2020-07-20 03:36:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 03:36:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:36:01,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:01,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-20 03:36:01,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764447283] [2020-07-20 03:36:01,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 03:36:01,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 03:36:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:36:01,678 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-20 03:36:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:01,988 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 03:36:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 03:36:01,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-20 03:36:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:01,989 INFO L225 Difference]: With dead ends: 76 [2020-07-20 03:36:01,990 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 03:36:01,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 03:36:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 03:36:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 03:36:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 03:36:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 03:36:01,998 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 03:36:01,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:01,999 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 03:36:01,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 03:36:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 03:36:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 03:36:02,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:02,000 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:02,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:02,209 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-20 03:36:02,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:02,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504938931] [2020-07-20 03:36:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:36:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:36:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:36:03,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504938931] [2020-07-20 03:36:03,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804173117] [2020-07-20 03:36:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3bab534c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:03,417 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3bab534c issued 2 check-sat command(s) [2020-07-20 03:36:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:36:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 03:36:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:36:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:36:03,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:36:03,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-20 03:36:03,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729142471] [2020-07-20 03:36:03,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 03:36:03,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:36:03,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 03:36:03,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:36:03,474 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-20 03:36:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:36:03,786 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 03:36:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 03:36:03,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-20 03:36:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:36:03,788 INFO L225 Difference]: With dead ends: 79 [2020-07-20 03:36:03,788 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 03:36:03,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 03:36:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 03:36:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 03:36:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 03:36:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 03:36:03,794 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 03:36:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:36:03,794 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 03:36:03,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 03:36:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 03:36:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 03:36:03,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:36:03,796 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:36:04,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:36:04,007 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:36:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:36:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-20 03:36:04,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:36:04,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249978047] [2020-07-20 03:36:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@73fa64b3 [2020-07-20 03:36:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:36:04,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:36:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:36:04,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:36:04,091 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:36:04,092 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:36:04,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 03:36:04,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:36:04 BoogieIcfgContainer [2020-07-20 03:36:04,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:36:04,187 INFO L168 Benchmark]: Toolchain (without parser) took 19786.82 ms. Allocated memory was 144.7 MB in the beginning and 491.3 MB in the end (delta: 346.6 MB). Free memory was 102.4 MB in the beginning and 177.5 MB in the end (delta: -75.0 MB). Peak memory consumption was 271.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,187 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.34 ms. Allocated memory is still 144.7 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,188 INFO L168 Benchmark]: Boogie Preprocessor took 28.38 ms. Allocated memory is still 144.7 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,191 INFO L168 Benchmark]: RCFGBuilder took 327.12 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 169.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,192 INFO L168 Benchmark]: TraceAbstraction took 19172.98 ms. Allocated memory was 201.3 MB in the beginning and 491.3 MB in the end (delta: 289.9 MB). Free memory was 168.9 MB in the beginning and 177.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 281.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:36:04,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.34 ms. Allocated memory is still 144.7 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.38 ms. Allocated memory is still 144.7 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.12 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 169.6 MB in the end (delta: -78.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19172.98 ms. Allocated memory was 201.3 MB in the beginning and 491.3 MB in the end (delta: 289.9 MB). Free memory was 168.9 MB in the beginning and 177.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 281.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; VAL [a=20, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=20, b=0, sum(a, b)=20] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=20, b=0, result=20] [L16] __VERIFIER_error() VAL [a=20, b=0, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.9s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 883 SDslu, 1148 SDs, 0 SdLazy, 821 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2308 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2245 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 602160 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3146 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...